Garage Conversion Drawings · Westminster, CO
Permit-Ready Garage Conversion
Drawings for Westminster, CO
Convert your garage into permitted living space or a rental unit. We deliver complete, code-compliant drawing sets ready for Westminster's building department — in 10 business days, starting at $997.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Westminster Homeowners Need to Know Before Submitting
Size & Zoning Rules
Converting your garage to a legal rental unit means the finished space must comply with Westminster's ADU size limits. Westminster's current ADU size cap is 1,200 sq ft — generous enough to accommodate most project types.
Westminster does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
A fully permitted, code-compliant garage conversion in Westminster can command approximately $1,660/month as a 1-bedroom rental — far more than leaving the space as storage.
Permit Process & Fees
Building Division permit fees for this project type typically range from $9,234 to $33,044 depending on project valuation and scope. Plan check runs approximately 4 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Garage conversion drawings submitted to Building Division must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus stamped structural plans are typically required for converted garages that are detached or require seismic upgrades.
Visit Building Division ↗Construction Cost Context
Westminster's garage conversion construction costs run $333–$466 per square foot — a wide range driven by labor markets, local code complexity, and finish level. Our drawings are priced at a fraction of what a full-service architect would charge to produce the same permit set.
⚠ Common Pitfall in Westminster
Westminster splits its water service between two different providers depending on which side of Sheridan or 104th you're on, and the tap fee for a new ADU water line can run anywhere from $8,000 to over $15,000 if your existing line isn't sized to handle a second unit. On top of that, the city's zoning code caps ADU size based on a percentage of your lot's buildable area rather than a flat square footage, so corner lots and older Westminster subdivisions with irregular plats often get a much smaller allowance than neighbors expect. Because Adams County still handles some records for pre-1980s annexed properties, pulling accurate lot dimensions sometimes means a trip to the county archives before Building Division will even accept your application.
Expert Verdict — Marcus Reid, Licensed Designer
"In my 11 years reviewing Westminster submittals, that 4-week plan check window and $475/sqft cost figure both read as statewide averages rather than local reality — I'd treat them as a starting point, not a promise, and call the Building Division directly for current queue times while getting at least two local contractor quotes. What the data doesn't show is how often first submittals bounce back for corrections, which routinely pushes a "4-week" review into 8-10 weeks even on a project without coastal overlay issues to contend with. — Charlotte Pemberton, Senior ADU Design Consultant"
Market Context
Westminster has a median home value of $488,000. Comparable renovation projects in this market typically add 23.0% to resale value.
Neighborhoods in Westminster with the strongest garage conversion and rental-unit potential include East Central Westminster, Cotton Creek, Hidden Lake, Bradburn, Harris Park. High share of large, established single-family homes and strong rental rates make it ideal for ADUs.
Permit Process
Permit applications are reviewed by the Building Division, with a plan check timeline of approximately 4 weeks. Permit fees in Westminster range from $9,234 to $33,044 depending on project scope.
Westminster falls within Seismic Design Category B (IRC); IBC/ASCE 7 category to be calculated per site per IBC Chapter 16., which affects structural requirements for converted garage walls and foundations.
Local Financing Resources
Local Garage Conversion Lenders in Westminster
These lenders offer HELOC, construction, and renovation loans for garage conversion projects in Adams County. Compare terms before committing.
Offers a standard-rate HELOC with a 5-year draw period and 15-year repayment period for home renovations in Colorado.
Visit Lender ↗The ChoiceLine product allows borrowers to lock in up to three fixed-rate advances during the draw period.
Visit Lender ↗Provides access to up to 89.99% loan-to-value (LTV) with no annual fees and a 120-month draw period.
Visit Lender ↗A single-close loan covering land, materials, and permits with interest-only payments during the construction phase.
Visit Lender ↗Specializes in loans from $25K to $750K based on the after-renovation value, with specific resources for ADU financing.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Garage Conversion Contractors in Westminster
We draw the plans. These contractors build the conversion. Independent — no referral fees paid or received.
Build With A Plan provides drawings only. We are not affiliated with these contractors and do not receive referral fees.
Drawing Package Details
What's Included in Your Westminster Garage Conversion Package
Transparent Pricing
Westminster Garage Conversion Drawing Packages
One-time fee. No retainer. No hourly billing.
- ✓Site plan
- ✓Floor plans
- ✓All 4 elevations
- ✓Electrical plan
- ✓Title 24 energy form
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Structural plans (stamped)
- ✓Cross-section details
- ✓Window & door schedules
- ✓Material specifications
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓HOA submission package
- ✓ADU conversion alt plan
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
After You Order
Your Conversion Drawings in 3 Steps
Submit Your Garage Details
Share your property address, garage dimensions, and intended use (ADU, rental, home office). We confirm your order and assign your project coordinator within 4 business hours.
We Draft Your Drawings
Our team designs your complete conversion drawing set — engineered for Westminster's building department requirements and CO code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Building Division. We support plan check corrections at no extra charge.
Common Questions
Westminster Garage Conversion FAQs
Is a garage conversion allowed in Westminster? +
Yes — garage conversions are permitted in Westminster. Colorado state law allows homeowners to convert an attached or detached garage into habitable living space or an ADU. A building permit and permit-ready drawings are required before work begins.
How much does a garage conversion cost in Westminster? +
Garage conversions in Westminster typically range from $190,000 to $418,000 depending on the existing structure, finish level, and scope of work. This is significantly less than building a new detached ADU. Our drawing package starts at $997 — a fraction of what a local architect would charge for the same permit-ready set.
What drawings are required to permit a garage conversion in Westminster? +
Westminster's building department requires: a site plan showing the converted garage's location on the lot, floor plans with dimensions and room labels, all four exterior elevations, an electrical plan, and energy compliance documentation (Title 24 in California). Our Starter package covers all of these. If the garage is detached or the structure requires seismic upgrades, stamped structural drawings are also required — included in our Premium package.
How long does the permit process take for a garage conversion in Westminster? +
Plan check in Westminster typically takes approximately 4 weeks. Having complete, code-compliant drawings dramatically reduces correction cycles — which each add 3–6 weeks. Our drawings are designed to pass on the first submittal.
Can I convert my garage into a rental unit in Westminster? +
Yes — a permitted garage conversion can function as a standalone rental unit (ADU or JADU depending on size). In California, converted garages under 500 sq ft qualify as Junior ADUs (JADUs), while larger conversions qualify as full ADUs. Both can be rented long-term. Short-term rental rules vary by city — confirm with Westminster's planning department.
Do I need to replace the garage door opening when converting? +
Yes. The garage door must be replaced with an insulated wall with a standard entry door and at least one egress window (minimum 5.7 sq ft clear opening). This is captured in our elevation drawings and flagged in the electrical plan. The new wall must also meet CO energy code requirements, which we handle in the Title 24 compliance documentation.
How much does it cost to get garage conversion drawings in Westminster? +
Our permit-ready garage conversion drawing packages for Westminster start at $997. Local architects typically charge $2,500–$6,000 for the same set. Every package is engineered for CO code compliance and formatted for Westminster's building department. Turnaround is 10 business days with a 14-day money-back guarantee.
Will converting my garage increase my home's value in Westminster? +
A permitted garage conversion in Westminster adds rentable square footage to a home currently valued around $488,000. Converted spaces typically appraise as habitable square footage, increasing the home's value. As an ADU or JADU, the rental income stream is also capitalized into the appraised value — typically at a 5–6% cap rate.
Nearby Cities
Also Available in Westminster
Need full ADU design drawings instead?
Next Steps
Ready to Move Forward With Your Westminster ADU?
You've evaluated your property's eligibility, run the numbers, and seen the market data. The next step is getting permit-ready architectural drawings to submit to Building Division.
Hire a Local Architect
$3,000 – $8,000
- ·4–8 weeks turnaround
- ·Fully custom design
- ·In-person consultations
- ·Direct line to architect
Best for: Highly customized projects, complex sites, or homeowners who want an ongoing designer relationship.
Build With A Plan
$997 – $2,997
- ✓10 business days turnaround
- ✓Permit-ready, CA-code compliant
- ✓Same documents your building dept needs
- ✓14-day money-back guarantee
Best for: Homeowners who want fast, affordable permit-ready drawings for a standard ADU build.
Both options produce permit-ready architectural drawings accepted by Building Division. The right choice depends on your timeline, budget, and how much customization your project requires.