Additions and ADUs in Westminster, CO
Making Space for the People Who Matter Most to You
Why Westminster Homeowners Choose Christie's
Because the Westminster Ranch You're In
Has More Space for the People Who Matter Most
For more than 25 years, Christie’s has helped Westminster homeowners navigate the gap between “the city now allows it” and “we’re actually ready to build.” A 1970s ranch with a rear yard that finally has a detached ADU on it, where your mom has her own front door, her own kitchen, and her Saturday morning coffee without anyone else’s schedule in the way. A second story that doubles what your home can hold, without doubling your commute or your property taxes on a new place.
At Christie’s Design/Build Remodeling, we start by being straight with you about what your Westminster home will actually need before a design gets drawn, because HOA covenants, shared utility capacity, and architectural compatibility requirements have a way of surfacing at the worst possible moment if nobody checks first. From established ranches near Standley Lake to newer HOA-governed subdivisions west of Wadsworth and the neighborhoods throughout central Westminster, we plan every addition and ADU around your real home, your real lot, and the people you’re building it for.
In Business
25+ Years
Helping Westminster homeowners navigate HOA covenants, shared utilities, and architectural compatibility rules to build additions and ADUs that actually work, for the family living in them today and the life ahead.
Our Model
One Team
Your Westminster addition or ADU is guided by one coordinated team from utility review and design through permitting, construction, and final walkthrough.
Where We Work
Westminster, CO
Serving homeowners throughout Standley Lake, Legacy Ridge, Walnut Creek, Apple Blossom, and established neighborhoods across Westminster.
Peace Of Mind
5-Year Warranty
Your new Westminster addition or ADU stays covered after construction ends, so you can settle into the space without worry.
What Makes Additions & ADUs Different In Westminster
When It's Done Right,
It Feels Like It Was Always Yours
Adding onto a Westminster home means you’re starting from a very specific set of conditions, a 1970s or 1980s ranch with real lot depth out back, a shared water and sewer connection that has to be scoped before design goes anywhere, and HOA covenants that remain independently enforceable even now that HB24-1152 makes ADUs legal by right across the city. Westminster’s architectural compatibility requirement, matching roof pitch, exterior finishes, and color on any detached ADU, is a code mandate, not a design suggestion, and it shapes decisions from the first concept sketch. At Christie’s Design Build, we work through all of it before design is finalized: utility capacity, covenant verification, lot setbacks, and structural conditions. The goal is an addition or ADU in Westminster, CO that fits your family’s life today and holds its value for every chapter that follows.
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Westminster Ranches Have Real Depth
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Westminster's Ranch Stock Sets the Starting Point
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Westminster's Aging Systems Deserve a Hard Look
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Westminster's Seasons Shape Every Material Decision
Westminster, CO Neighborhoods
More Room Without Leaving
the Westminster You've Built Your Life In
Legacy Ridge
When the Home You Stayed For Still Has Family Left to House
Bradburn Village
Add What Your Family Needs Without Touching What the Neighborhood Loves About Your Home
Standley Lake
When a Lakeside Neighborhood Finally Has Room for the Whole Family
Hyland Greens
Build the Space Your Family Has Been Waiting For
Huntington Trails
Build the Space This Home Has Always Had Room to Become
Our Westminster Additions & ADU Process
From the First Conversation to the Day Your Family Feels Whole
Adding an addition or ADU in Westminster brings questions that are specific to your lot, your subdivision, and the ranch already standing on it, a CC&R in your HOA that operates independently of Colorado’s new ADU law, a shared sewer lateral that has to be scoped before a detached unit can be permitted, an architectural compatibility rule that shapes material and roofline decisions from the very first sketch. A home near Legacy Ridge carries a completely different set of starting conditions than a newer build near Orchard Hills. Our process walks each project through site evaluation, covenant review, design, permitting, utility coordination, construction, and final walkthrough with one team keeping every phase clear from beginning to end.
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Site & Structure Review
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Goals & Design Direction
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Detailed Project Planning
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Permits & Trade Coordination
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Construction & Communication
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Final Review & Completion
Our Westminster Additions & ADU Process
From the First Conversation to the Day Your Family Feels Whole
Adding an addition or ADU in Westminster brings questions that are specific to your lot, your subdivision, and the ranch already standing on it, a CC&R in your HOA that operates independently of Colorado’s new ADU law, a shared sewer lateral that has to be scoped before a detached unit can be permitted, an architectural compatibility rule that shapes material and roofline decisions from the very first sketch. A home near Legacy Ridge carries a completely different set of starting conditions than a newer build near Orchard Hills. Our process walks each project through site evaluation, covenant review, design, permitting, utility coordination, construction, and final walkthrough with one team keeping every phase clear from beginning to end.
.01
Site & Structure Review
.02
Goals & Design Direction
.03
Detailed Project Planning
.04
Permits & Trade Coordination
.05
Construction & Communication
.06
Final Review & Completion
What Westminster Homeowners Want From Their Addition or ADU
More Room for the
Family Decision You're Already Making
Room for Parents and Everyone
Space That Feels Like Home
In Westminster's established subdivisions like Countryside and Apple Blossom Lane, most homes were designed for households far smaller than the families living in them today. A thoughtful addition or detached ADU can create a genuinely private suite for aging parents, give returning adult children their own entrance, or open a main living area that's felt too tight for years.
Designs That Adapt With You
Room Ready When Life Shifts
Westminster ranches built in the 1980s carry floor plans that made sense then but create daily friction now. Reconnecting old and new space with intentional flow and no jarring transitions is where these projects start feeling like a home again.
Garage Space, Finally Useful
A Real Door, Their Space
Westminster's ranch lots carry real depth, and a well-planned addition can do more than add square footage alone. Built-in storage, a mudroom entry, and a dedicated laundry area make the finished space feel calmer and genuinely easier to move through each day.
Same Lot, Genuine Independence
Family Close, Everyone Comfortable
For homeowners near Standley Lake and in Westminster's quieter northern neighborhoods, a permitted ADU or in-law suite can make multigenerational living feel genuinely sustainable rather than improvised. A private entrance, full kitchen, and curbless shower change the whole dynamic, for everyone living on the property.
Built for Westminster's Real Seasons
Built for Westminster's Real Life
Westminster additions have to hold up against hail seasons, freeze-thaw cycles, and the exterior compatibility requirements that come with connecting new construction to a 1970s or 1980s ranch. Matching roof pitch, exterior finishes, and color aren't just design preferences here, they're code mandates that shape material decisions from the first concept forward.
What To Consider When Building An Addition or ADU In Westminster
Build the Space Your Westminster Home
Has Been Ready For All Along
Who is this space actually for, and what does their average day need to look like inside it?
Does your Westminster HOA have covenants that could affect this project, and have you actually read them recently?
Do you know what your home's existing utilities can actually support?
How do you want this space to feel five or ten years from now, not just the day it's finished?
Our Reviews
Trusted by Westminster Homeowners
With the Spaces Their Families Gather In
Areas We Service Across Westminster
Westminster Ready,
Built Around the Family You Have Now
- Bradburn Village
- Legacy Ridge
- Westview
- Shaw Heights
- Countryside
- Standley Lake
- The Ranch
- Hyland Hills
- Sherwood Hills
- Cotton Creek
- Sunset Ridge
- Arrowhead
Other Areas We Service
Weld County
Boulder County
Adams County
Jefferson County
Broomfield County
Larimer County
Westminster Addition & ADU Frequently Asked Questions
The Questions Behind
Adding More Space to a Westminster Home You Love
Does HB24-1152 mean I can build an ADU in Westminster without any restrictions?
My Westminster subdivision has an HOA. Can it block my ADU even though the city allows it?
Can my Westminster ADU have its own water and sewer meter?
How does Westminster's architectural compatibility requirement actually affect my detached ADU design?
What's the realistic timeline for an addition or ADU in Westminster from the day I call to the day it's finished?
Can I rent my Westminster ADU on a short-term platform like Airbnb?
My Westminster ranch has a 200-amp panel, is that enough to support a new addition or ADU?
Will my Westminster addition or ADU count as finished square footage and add to my home's appraised value?
Start The Conversation
Your Westminster Home
Is Ready for the Family You're Growing Into
Our Other Remodeling Services
From The Blog
Your Westminster Home
Has Space for the People Who Matter Most


