Contact Us
(303) 833-4715
Contact Us
(303) 833-4715

Northern Denver & Front Range's Premier Design-Build Firm

Basement Finishing And Remodeling In Boulder, CO

Helping Boulder Homeowners Finally Build The Basement They've Been Imagining

Start Planning Your Project

Why Boulder Homeowners Choose Christie's

Because Every Boulder Basement
Deserves To Be a Designed Second Floor

For more than 25 years, Christie’s has helped Boulder homeowners stop treating their basement like a holding area for ski gear and holiday boxes and start treating it like the second floor they always needed. The custom bar where Friday nights finally feel easy. The guest suite that makes your parents’ visit something everyone looks forward to. The home gym and sauna that replace a gym membership you were never fully using. That is what makes basement finishing personal.

At Christie’s Design/Build Remodeling, we start with your clay-soil foundation and your column-interrupted floor plan and we design around both, before a single wall goes up. We think about moisture conditions, permit timelines, ceiling clearances, and how your household actually spends a Saturday. From Table Mesa and Gunbarrel to Niwot and the mid-century Ranch streets of South Boulder, we bring the design thinking, the craft, and the straight talk to turn raw concrete into one of the most-loved spaces in your Boulder home.

In Business

25+ Years

Helping Boulder homeowners turn raw, underused square footage into designed spaces they genuinely look forward to walking into.

Our Model

One Team

One unified team guiding your Boulder basement finishing project from the first design conversation through every permit, inspection, and finishing detail.

Where We Work

Boulder, CO

Basement finishing serving Table Mesa, Gunbarrel, Niwot, South Boulder, and surrounding Boulder neighborhoods.

PEACE OF MIND

5-Year Warranty

Confidence that sticks around long after your Boulder basement finishing project is complete, from moisture-proofed foundation to custom millwork finish.

What Makes Basement Finishing & Remodeling Different In Boulder

A Finished Boulder Basement
Has To Be Designed Before It Gets Built

Basement finishing in Boulder looks completely different from one home to the next, and that’s exactly why the design has to lead. A 1970s ranch in Table Mesa may need egress window cuts, a full electrical panel upgrade, and concrete trenching for a new bathroom drain before any framing starts, while a newer Gunbarrel home might already have the rough-ins but still need a floor plan that honestly accounts for columns, ceiling clearance, and how three or four distinct lifestyle zones actually live together. Boulder homeowners at this level aren’t shopping for finished square footage, they’re after a custom entertaining bar, a legal guest suite, a wellness space with a sauna, and a media room that feels purpose-built. At Christie’s Design/Build, we start by reading your home’s structure, your household’s rhythms, and your timeline against Boulder’s 4–7 week permit review window, so the project is fully thought through before construction day one.

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Boulder Homes Across Three Distinct Eras

Boulder basements range from raw, column-interrupted utility floors in 1960s Table Mesa ranches to more generous footprints in Gunbarrel and Niwot, meaning every finishing project starts with an honest read of what the existing structure can actually support.

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Clay Soils and Column Constraints Below

Boulder basements in this era of construction almost always carry support columns, low ductwork runs, and absent plumbing rough-ins that directly shape what the space can become. Finishing them well means solving those structural and mechanical realities before the design conversation even begins.

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Pre-Finish Electrical, Plumbing, and Moisture Work

In Boulder's older Ranch-era neighborhoods, finishing a basement routinely surfaces absent egress windows, panels without capacity for modern entertainment and gym loads, moisture intrusion at the slab tied to expansive clay soils, and structural columns that have to be designed around rather than ignored.

.04

Boulder Wellness and Entertaining Culture

Boulder's clay soils create real moisture pressure at the foundation, seepage, efflorescence, and musty odors that have to be diagnosed and resolved before a single wall goes up. Getting that right is what keeps a finished basement feeling like a living space five years from now, not just the first season.

Our Work

Boulder, CO Neighborhoods

Your Boulder Home Has
A Second Floor Waiting

Boulder’s neighborhoods are full of 1960s through early 2000s ranch and split-level homes sitting on raw, unfinished basements that have been storing bikes and holiday boxes for decades. Basement finishing in Boulder means something more specific here than in most markets, it means designing a genuine second lifestyle floor around clay-soil moisture conditions, support columns, and permit timelines before construction ever begins. A family in Table Mesa might be ready for a custom entertaining bar and a home gym that fits how Boulder people actually live, while a Gunbarrel homeowner needs a legal guest suite with an egress window for parents who visit for months at a time. We look at your foundation conditions, ceiling clearances, and how your household wants to move through the space before a single wall goes up. The neighborhoods below reflect exactly the kind of homes, and families, we work with every day.

Table Mesa

A Lower Level Built for How Your Family Actually Lives

Homes in Table Mesa carry that midcentury ranch and split-level character, solid bones, generous footprints, and raw basements that have quietly held HVAC equipment and decades of storage while the rest of the house got all the love. For families who have planted roots here and aren’t going anywhere, finishing that lower level is often the move that finally makes the home feel complete. A basement finish in Table Mesa might bring a custom entertaining bar, a legal guest suite with egress window, a wellness space or home gym, and built-ins that feel designed rather than assembled, all resolved around the clay-soil moisture conditions this neighborhood demands before a single wall goes up. The foothills are right there; the home should match the life you’re already living.

Mapleton Hill

Turn A Century-Old Basement Into The Space Your Home Has Always Deserved

Mapleton Hill homes carry a century or more of history in their bones, and the basements beneath those Victorian-era foundations are some of the most character-rich, and technically complex, spaces we work in. Original stone or brick foundation walls, low ceiling clearances, and the absence of any modern plumbing rough-in are the baseline here, not the exception. A basement finish on Mapleton Hill means working thoughtfully around that legacy construction to create something genuinely livable, a custom entertaining bar, a legal guest suite with a proper egress window, a home gym or wellness space, without compromising the integrity of what makes this house worth owning. The goal is a finished lower level that feels as considered and intentional as every room above it.

North Boulder

A Basement Built for the Way North Boulder Families Live

In North Boulder, the basements beneath these Craftsman bungalows and mid-century ranches carry decades of character above them, and the finishing work has to honor that, not fight it. These homes weren’t built with open-concept basements in mind, so thoughtful design comes first: working around columns, older mechanical systems, and ceiling heights that need careful planning before a single wall goes up. What homeowners here want most is a space that feels like it belongs to this house, a custom entertaining bar, a guest suite with proper egress, a wellness zone that fits the way North Boulder families actually live. The finished basement should feel like it was always part of the home.

Chautauqua

Where Historic Character Meets a Basement Built for How You Actually Live

Chautauqua homes carry a kind of architectural weight you don’t find in newer Boulder neighborhoods, wide porches, character-rich bones, and main floors that have already been loved for decades. The basements beneath them, though, are often still raw: unfinished slabs, exposed mechanicals, and square footage that’s been quietly waiting. Finishing that space means honoring everything the home above already is, with design-led rooms, period-sensitive details, and a layout calibrated to the way your family actually gathers, recovers, and hosts guests at the foot of the Flatirons.

Newlands

The Cottage Has More to Give Than You Think

Newlands is a neighborhood where a 1930s cottage sits next to a thoughtful modern infill, and the homeowners in both are asking the same quiet question about what’s underneath. Whether you’re working with an original foundation or a more recent pour, a basement here carries real potential, a wellness zone for post-trail recovery, a guest suite for parents who stay longer than a weekend, or a custom bar that finally gives the main floor room to breathe. It takes design-led problem-solving from the start, but the payoff is a second floor that genuinely fits how you live in Boulder.

Our Boulder Basement Finishing Process

The Space Below You Has Been Waiting Long Enough

Finishing a basement in Boulder comes with decisions that are genuinely specific to your home, your neighborhood, and the life you’re building inside it, a 1970s ranch in Table Mesa sitting on expansive clay soils calls for a very different approach than a newer Gunbarrel home where the slab is dry and the ceiling heights give you room to work with. Our process moves your project through every phase, clay-soil moisture diagnosis, design, Boulder County permitting, construction, and final walkthrough, so the finished lower level feels like it was always supposed to be part of your home.

Start Planning Your Project
(303) 833-4715

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Initial Consultation

We start by getting honest about what your unfinished Boulder basement is dealing with right now, moisture conditions, ceiling clearances, egress options, column placement, and how your mechanical systems live in the space. We look at all of it before a single design decision gets made. From there, we begin shaping a finished layout that works around your home’s real constraints and opens up toward the custom bar, guest suite, or wellness space you’ve been thinking about.

.02

Planning & Budgeting

Every Boulder basement project begins with a real conversation about how you want to use the space and what your home’s structure actually allows. We talk through column placement, ceiling height, egress requirements, and moisture conditions alongside your wishlist, the entertaining bar, the guest suite, the gym, so the plan reflects both. That combination of honest assessment and design intent is what makes the finished space feel right rather than just finished.

.03

Design & Layout Planning

Once we understand your goals, we design the details of your finished Boulder basement around the life you want it to support. That means floor plan layout, ceiling treatments, lighting, custom built-ins, and any bar, bathroom, bedroom, or wellness space you’re planning. Every decision is made with your specific home in mind, so the lower level doesn’t just function well, it feels connected to everything above it.

.04

Permitting & Preparation

Before construction begins, Christie’s handles the coordination that keeps your Boulder basement project moving without unnecessary stress. We manage Boulder County permit filings, material lead times, trade scheduling, and the 4–7 week first-submission review window so nothing catches you off guard. Getting those details locked in early gives the project a clear path from approved plans to the first day crews are on-site.

.05

Construction

This is where your Boulder basement starts becoming the space you’ve been picturing. Our crews move carefully through framing, moisture management, insulation, drywall, flooring, carpentry, and finish work, keeping you informed at every phase along the way. Whether your project centers on a custom entertaining bar, a legal guest suite with egress window, a home gym with sauna, or all of the above, each piece is coordinated so the finished lower level comes together the way it was designed.

.06

Final Walk-Through

When construction wraps, we walk the finished basement with you and go through every detail together. We want you to feel the difference, the way the bar area flows into the lounge, how the guest suite reads like a real bedroom, how the gym finally gives your household room to breathe. The goal is a finished lower level that feels like it’s always been part of your Boulder home, from the very first evening you use it.

Our Boulder Basement Finishing Process

The Space Below You Has Been Waiting Long Enough

Finishing a basement in Boulder comes with decisions that are genuinely specific to your home, your neighborhood, and the life you’re building inside it, a 1970s ranch in Table Mesa sitting on expansive clay soils calls for a very different approach than a newer Gunbarrel home where the slab is dry and the ceiling heights give you room to work with. Our process moves your project through every phase, clay-soil moisture diagnosis, design, Boulder County permitting, construction, and final walkthrough, so the finished lower level feels like it was always supposed to be part of your home.

.01

Initial Consultation

We start by getting honest about what your unfinished Boulder basement is dealing with right now, moisture conditions, ceiling clearances, egress options, column placement, and how your mechanical systems live in the space. We look at all of it before a single design decision gets made. From there, we begin shaping a finished layout that works around your home’s real constraints and opens up toward the custom bar, guest suite, or wellness space you’ve been thinking about.

.02

Planning & Budgeting

Every Boulder basement project begins with a real conversation about how you want to use the space and what your home’s structure actually allows. We talk through column placement, ceiling height, egress requirements, and moisture conditions alongside your wishlist, the entertaining bar, the guest suite, the gym, so the plan reflects both. That combination of honest assessment and design intent is what makes the finished space feel right rather than just finished.

.03

Design & Layout Planning

Once we understand your goals, we design the details of your finished Boulder basement around the life you want it to support. That means floor plan layout, ceiling treatments, lighting, custom built-ins, and any bar, bathroom, bedroom, or wellness space you’re planning. Every decision is made with your specific home in mind, so the lower level doesn’t just function well, it feels connected to everything above it.

.04

Permitting & Preparation

Before construction begins, Christie’s handles the coordination that keeps your Boulder basement project moving without unnecessary stress. We manage Boulder County permit filings, material lead times, trade scheduling, and the 4–7 week first-submission review window so nothing catches you off guard. Getting those details locked in early gives the project a clear path from approved plans to the first day crews are on-site.

.05

Construction

This is where your Boulder basement starts becoming the space you’ve been picturing. Our crews move carefully through framing, moisture management, insulation, drywall, flooring, carpentry, and finish work, keeping you informed at every phase along the way. Whether your project centers on a custom entertaining bar, a legal guest suite with egress window, a home gym with sauna, or all of the above, each piece is coordinated so the finished lower level comes together the way it was designed.

.06

Final Walk-Through

When construction wraps, we walk the finished basement with you and go through every detail together. We want you to feel the difference, the way the bar area flows into the lounge, how the guest suite reads like a real bedroom, how the gym finally gives your household room to breathe. The goal is a finished lower level that feels like it’s always been part of your Boulder home, from the very first evening you use it.
Start Planning Your Project
(303) 833-4715

What Boulder Homeowners Want From Their Basement Finish

A Boulder Basement That
Feels Like the Rest of Your Home

What Boulder homeowners want from a finished basement is shaped by how they actually live, and this city has a specific culture around wellness, entertaining, and design quality that shows up in every project conversation. Clay soils, column-interrupted floor plans, and permit timelines of four to seven weeks mean the homes here need a design-led process, not just a construction crew with a material list. The goal is a lower level that functions as a true second floor: a bar you actually host at, a gym you use every morning, a guest suite your family is genuinely glad to stay in.

Legal Guest Suites & Full Baths

More Room For The Life You Live

Many Boulder basements hold enough unfinished space to become a genuine second floor, a guest suite, a wellness room, an entertaining lounge that finally gives your home room to breathe for the people who matter most to you.

Design-Led Floor Plans That Work

Make Every Square Foot Matter

Boulder's older ranch and split-level homes come with support columns, low duct runs, and floor plans that were never designed with living space in mind. Smart layout work navigates all of that early, so the finished result flows naturally and actually feels good to be in.

Custom Built-Ins, Bars & Storage

A Space For Every Part Of Life

Without a real storage plan, a finished Boulder basement fills up fast and stops feeling like the retreat you built it to be. Integrated built-ins, dedicated closets, and intentional storage zones keep things organized so the living space stays open and actually gets used.

Custom Millwork & Architectural Details

A Second Floor, Finally Finished

When you're already investing in a full basement buildout, the details are what make it feel like it belongs in your home. Custom millwork, a designed bar, coffered ceilings, and thoughtful hardware are what separate a real finished basement from one that just has drywall and carpet.

Flooring Built For Below Grade

Built Around How You Actually Live

Boulder basements need flooring that holds up against moisture, temperature swings, and heavy daily use, all below grade. Luxury vinyl plank, porcelain tile, and engineered hardwood each handle those conditions differently, and choosing the right one means the floor stays beautiful for years without worry.

What To Consider When Finishing Your Basement In Boulder

Plan Beyond The
Finished Floor

Your Boulder home probably has 800 to 1,200 square feet sitting raw beneath you right now, and what’s down there matters before a single wall goes up. Clay soils, ceiling clearance around ductwork, missing plumbing rough-ins, and egress requirements all shape what the space can actually become. Working through those realities early is what separates a basement that feels designed from one that feels finished.

How do you actually want to feel when you walk downstairs?

It sounds like a simple question, but the answer tells you everything. Do you want the quiet of a wellness space at 6 a.m. before the house wakes up? The energy of having friends over without crowding your main floor? A guest room that finally makes long visits comfortable? Boulder basements can do all of those things, but they do them best when you’ve decided which one matters most before the floor plan starts.
A home gym and sauna might be exactly right for where your family is today, but if your kids are heading to college in a few years, a guest suite might serve you longer. Alternatively, a legal bedroom now could double as a wellness retreat later with the right layout. Think about the household you’ll have in five years, not just the one you have today, good basement design leaves room for that evolution without requiring a redo.
That faint musty smell, the white residue on the foundation wall, the dampness you notice after a heavy spring rain, these aren’t small details to resolve later. Boulder’s clay soils make moisture a real variable in a meaningful share of older homes, and finishing over an unresolved moisture problem is one of the most expensive mistakes a homeowner can make. Before you fall in love with a bar layout or a media room design, take a clear-eyed look at what the foundation is telling you.
Boulder County’s first-submission permit review alone runs four to seven weeks, and that’s before construction starts. If you’re anchoring this project to a family event, a holiday gathering, or a planned move, that timeline needs to be part of your planning from the very first conversation, not a surprise two months in. If you have more flexibility, you can let the design lead without pressure. Knowing which situation you’re in changes everything about how you approach the process.

Our Reviews

What Boulder Families Feel
After the Work Is Done

Choosing a team to finish your basement in Boulder means handing someone the keys to a space your family will live in for years, and trusting they’ll treat it that way. You want people who communicate honestly, show up when they say they will, and actually care how it turns out. Our Boulder reviews reflect exactly that: the transparency, the follow-through, and the craftsmanship Christie’s brings to every project from first call to final walkthrough.

Start Planning Your Project

Areas We Service Across Boulder

More Space in Boulder
Inside the Home You Already Love

Across Boulder, homeowners are realizing that the most overlooked space in the house is sitting right beneath them. From mid-century ranch homes in Table Mesa and South Boulder with raw, column-interrupted basements to split-levels in Gunbarrel and Wonderland Hills with wide-open lower floors, every property carries its own potential. Whether you’re picturing a custom bar for weekend entertaining, a legal guest suite so visiting family actually has room to breathe, a home gym with a sauna, or a media room the whole household will actually use, Christie’s turns that unfinished square footage into a designed second floor that truly feels like the rest of your home.
  • Table Mesa
  • Mapleton Hill
  • Gunbarrel
  • Pine Brook Hills
  • Whittier
  • South Boulder
  • Newlands
  • Chautauqua
  • Wonderland Hills
  • North Boulder
  • Baseline
  • University Hill
Contact Us
(303) 833-4715

Other Areas We Service

Weld County

Greeley, CO
Erie, CO
Fort Lupton, CO
Firestone, CO
Frederick, CO

Boulder County

Lafayette, CO
Longmont, CO
Louisville, CO

Adams County

Brighton, CO
Commerce City, CO
Northglenn, CO
Thornton, CO

Jefferson County

Arvada, CO
Westminster, CO

Broomfield County

Broomfield, CO

Larimer County

Loveland, CO
Windsor, CO

Boulder Basement Finishing Frequently Asked Questions

Answers Before You
Build Downstairs

Boulder homeowners come to us with very different basement challenges depending on where they live in the city. A home in Table Mesa or South Boulder might have a raw, column-interrupted footprint sitting on expansive clay soils that need moisture work done before a single wall goes up. Homes in Gunbarrel or Niwot often have larger unfinished footprints with decent bones but no bathroom rough-in, no egress window, and a permit timeline through Boulder County that surprises a lot of families planning around a specific move-in date. These FAQs address what Boulder homeowners most commonly ask before starting a basement finishing project with Christie’s Design/Build Remodeling.

Still Have Questions?
We're Here To Help.

Contact Us
(303) 833-4715

How long does the permitting process take for a finished basement in Boulder?

Boulder County typically takes four to seven weeks to review a first-submission basement finish permit, and that’s when the application is complete with floor plans, egress details, and electrical and plumbing layouts all included. The City of Boulder runs its own separate workflow through the Building Permits and Inspections division, so your timeline depends on which jurisdiction your address falls under. If you’re planning around a family visit, a move-in date, or even a holiday you want to actually host in the new space, that permitting window needs to be built into your schedule from the very first conversation, not discovered after design is done.
Yes, and there’s no way around it. Any room classified as a bedroom in a finished Boulder basement must have a code-compliant egress window, full stop. Most older homes in Table Mesa, Gunbarrel, and Niwot don’t have them in the basement, which means cutting a rough opening through the foundation wall, installing a window well, and framing properly to meet size and sill-height requirements. It’s standard scope on any guest suite buildout we do, and it’s one of the details that also matters at resale, buyers’ agents and inspectors will ask, and a bedroom without egress has to be disclosed accurately.
It means we address it first, before design goes final and definitely before framing starts. A significant share of Boulder-area homes sit on expansive clay soils, and those soils create real moisture pressure against foundation walls, seepage, efflorescence, musty odors that get worse when you close the space off with drywall. We diagnose what’s actually happening with your specific foundation before we lock in a scope. Homeowners who’ve finished over a moisture problem without fixing it tend to find mold behind walls and flooring failures within a few years. That’s not a conversation anyone wants. We’d rather have it upfront.
With design, honestly. Columns are nearly universal in Boulder’s 1960s through 2000s basement stock, and the question isn’t whether they exist, it’s how your floor plan works around them. Sometimes a column lands in a spot that shapes the bar layout or defines the boundary between the lounge and media room in a way that actually makes design sense. Sometimes it needs to be incorporated into a built-in or a partial wall. We plan around your column locations from the beginning of the design phase, so what could feel like a constraint becomes part of a purposeful layout rather than something we’re working around at the end.
Most homes in this era of Boulder construction come in at seven to eight feet of raw ceiling height before anything is finished. That sounds comfortable until you account for ductwork runs, beam drops, and the finished ceiling itself, then you start losing inches in specific zones. Code requires a minimum of seven feet in habitable rooms, and strategic HVAC routing and soffit placement can protect that clearance where it matters most. In certain zones, a gym, a theater room, a utility area, lower ceilings are actually fine. We look at the whole ceiling plane early in design so you’re not discovering clearance problems after framing is already up.
Not a wet bar cabinet from a showroom floor, a designed room-within-a-room built around how you actually entertain. Custom millwork cabinetry, quartz or natural stone counters, undercounter refrigeration, integrated wine storage, a bar sink, pendant lighting, and barstool seating that connects naturally to the lounge zone. Some projects extend to a dedicated wine cellar with temperature control. The bar is almost always the visual anchor of the space, and it’s typically the first thing homeowners describe when they’re telling us what they want. We design it as a complete interior element, not an appliance package with a cabinet wrap.
That’s the whole goal, and it’s absolutely achievable with the right design decisions made early. Egress windows bring in real natural light where before there was none. Strategic recessed lighting, intentional ceiling treatments, coffered ceilings, board-and-batten detail, and high-quality finishes throughout make the space read as a designed interior, not a finished utility room. Flooring that performs below grade, luxury vinyl plank, tile, engineered hardwood in appropriate zones, also changes how the space feels underfoot. By the time a project wraps, most Boulder families tell us they spend as much time downstairs as they do on the main floor. That’s the version of done we’re working toward.
They work really well, and in Boulder they’re a consistent request rather than an unusual one. Homeowners who hike, run, or bike seriously want recovery infrastructure at home, a sauna or steam shower in the basement gym means the whole loop stays in the house. A sauna requires proper electrical service and ventilation; a steam shower needs a dedicated generator unit, moisture-resistant wall and ceiling finishes, and a drain system set up to handle condensation correctly. Both are scope items we’ve done enough times that the sequencing is dialed in. If that’s part of what you’re imagining downstairs, bring it up early so we can plan the mechanical rough-in before the slab work is done.

Start The Conversation

A Boulder Basement
Your Family Will Love

That raw, column-interrupted space beneath your Boulder home has real potential, a custom bar for hosting, a legal guest suite for the people you love most, a wellness zone built around the active life you already lead, all designed around your home’s specific conditions before a single wall goes up. Christie’s Design/Build Remodeling handles everything from clay-soil moisture diagnostics and Boulder permitting to the finished details that make it feel like the best room in the house, reach out today.

Start Your Project
(303) 833-4715

our Other Remodeling Services

Kitchen
Remodeling

Learn More

Whole-Home
Remodeling

Learn More

Home Additions
& ADUs

Learn More

Bathroom
Remodeling

Learn More

Deck
Construction

Learn More

Outdoor
Living Spaces

Learn More

From The Blog

Ideas For The Boulder Basement
You've Been Putting Off

Planning a basement finishing project in Boulder means thinking through clay-soil moisture, permit timelines, egress requirements, and the kind of lifestyle zones, custom bars, guest suites, wellness spaces, that actually fit how your family lives. Our blog gives Boulder homeowners honest guidance, design ideas, and local insight so you can walk into this project feeling genuinely ready.