ADU Design Resource · Commerce City, CO
The Complete Guide to
Building an ADU in Commerce City, CO
Everything Commerce City homeowners need to plan, permit, and profit from an ADU — including current 2026 zoning rules, real construction costs, neighborhood ROI data, and verified local lenders.
Created by Build With A Plan · Drawings from $997 (more below)
Quick Answers About Commerce City, CO ADUs
Market Context
Commerce City has a median home value of $390,000. Adding an ADU typically increases that by 23% — approximately $89,700 in added equity. A 1-bedroom ADU in Commerce City rents for approximately $1,550/month in the Adams County rental market , yielding a 6.8% cap rate on the investment. Occupancy averages 94% in this market.
Top Commerce City neighborhoods for ADU investment include Buffalo Run, Reunion, River Run, Hazeltine, Commerce City North. High concentration of single-family homes and higher median values near highways and DIA make rentals/ADUs financially attractive. Large, newer lots and proximity to trails and commuter routes support detached ADUs and rental demand.
Permit Process
Permit applications are reviewed by the Building Safety Division of Community Development , with a plan check timeline of approximately 6 weeks. Permit fees in Commerce City range from $2,200 to $8,500 depending on project scope. Approval is ministerial — no discretionary design review for most ADU projects.
11 years in California residential permitting and ADU documentation. This guide was researched and verified against Commerce City's building department records and current 2026 California ADU law.
Property Eligibility
Is My Commerce City, CO Property Eligible for an ADU?
Commerce City homeowners benefit from California's state ADU law — one of the most permissive frameworks in the country since 2020. Here's what applies to your property before you start designing.
Single-Family Home
Permitted on single-family lots in Commerce City under California state law. No owner-occupancy requirement in Commerce City — you can rent both units as investment properties. Ministerial permit approval — no neighbor input or discretionary design review.
Multi-Family Property
Up to 2 detached ADUs plus JADUs (Junior ADUs) within the existing main structure are permitted under California state law. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 44% of Commerce City homes are in an HOA. California law (AB 670) prohibits HOAs from banning ADUs outright, but they can impose reasonable architectural standards. Our drawings include HOA submission formatting.
Always verify eligibility with Building Safety Division of Community Development before designing.
Free Tool · No Email Required
Commerce City ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Commerce City construction costs, median rental rates, and property value uplift data. Adjust the inputs to model your specific project.
Your Project
Projected Returns
* Estimates only. Assumes ~85% occupancy, ~30% expense ratio, 23% property value uplift. Consult a financial advisor before investing.
Data sources: Commerce City Development Services Department, Zillow Rental Market Reports, local appraiser records. Last verified: 2026-05-30.
Local Market Data
Top Commerce City Neighborhoods for ADU Investment
Buffalo Run
High concentration of single-family homes and higher median values near highways and DIA make rentals/ADUs financially attractive.
Reunion
Large, newer lots and proximity to trails and commuter routes support detached ADUs and rental demand.
River Run
Modern single-family neighborhoods with good commuter access and family rental demand.
Hazeltine
Suburban single-family community with lot sizes and neighborhood amenities favorable for ADUs.
Commerce City North
Newer master-planned subdivisions with many single-family lots and easy highway access for renters working in Denver/DIA.
Belle Creek
Established neighborhood with mid-to-large lot sizes and nearby parks—good for detached ADUs and family rentals.
Irondale
Mix of single-family homes near employers and recreational sites supporting rental demand.
Dunes Park
Planned-community feel with modern homes and lot footprints that often allow detached ADUs.
Central Commerce City
Higher single-family density, smaller homes but many lots (~7,400 sq ft median) that can support ADUs and transit access.
Adams City
Older single-family stock with affordable values and proximity to transit and employment corridors—strong rental demand potential.
Commerce City ADU Market at a Glance
Local Zoning Rules
Commerce City ADU Zoning Regulations
| Regulation | Commerce City Allowance |
|---|---|
| Max ADU Size | 1,000 sq ft |
| Max Height | 22 ft |
| Side Setback | 5 ft |
| Rear Setback | 5 ft |
| Owner Occupancy | Not required |
| Short-Term Rental | Permitted |
| Coastal Overlay | No |
| Design Review | No |
| HOA Prevalence | 44% of properties |
Data verified recently. Always confirm with the Building Safety Division of Community Development before designing.
Commerce City Permit Process
Commerce City ADU Permit Timeline & Fees
ℹ Timeline and fee estimates are based on California state averages. Actual Commerce City data coming soon.
Local Financing Resources
Local ADU Lenders in Commerce City
These lenders offer HELOC, construction, and renovation loans for ADU projects in Adams County. Compare terms before committing.
Offers standard and variable-rate HELOCs with terms up to 240 months at their Commerce City Reunion Service Center.
Visit Lender ↗The Home Equity ChoiceLine combines the stability of a home equity loan with the flexibility of a line of credit.
Visit Lender ↗Provides home improvement-focused HELOCs and loans with rates starting as low as 6.74% APR for qualified borrowers.
Visit Lender ↗Offers short-term construction loans specifically for new builds and major renovations, including permits and labor.
Visit Lender ↗Specializes in renovation-specific home equity loans that allow homeowners to borrow against the future value of the ADU.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted ADU Contractors in Commerce City
We draw the plans. These contractors build them. 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.
Next Steps
Ready to Move Forward With Your Commerce City 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 Safety Division of Community Development.
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 – $1,997
- ✓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 Safety Division of Community Development. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Commerce City ADU Package
Engineered for CO Permit Approvals
Transparent Pricing
Commerce City ADU Drawing Costs — Compared
What homeowners typically pay for permit-ready ADU drawings in Commerce City, by service type:
| Service Type | Price Range | Turnaround | Customization |
|---|---|---|---|
| Local Architect | $3,000 – $8,000 | 4–8 weeks | Fully custom |
| Build With A Plan · Starter | $997 | 10 days | Standard |
| Build With A Plan · Standard | $1,497 | 10 days | Standard |
| Build With A Plan · Premium | $1,997 | 7 days | Enhanced |
- ✓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
- ✓Garage conversion alt plan
- ✓HOA submission package
- ✓2 rounds of revisions
- ✓Priority 7-day turnaround
After You Order
Your Drawings in 3 Steps
Submit Your Project
Share your property address, lot dimensions, and ADU type. We'll confirm your order and assign your project coordinator.
We Draft Your Drawings
Our team designs your permit-ready drawing set — engineered for Commerce City's building department requirements and CO code. Delivered in 10 business days.
Submit to Your City
Download your complete drawing package and submit directly to Building Safety Division of Community Development. We support corrections at no extra charge.
Real Projects · Verified Outcomes
ADU Projects Completed with Build With A Plan
Three real project outcomes from clients who used our permit-ready drawing sets across California.
"Permit approved on the first submittal. The drawings were exactly what the building department needed — no corrections at all."
"We converted our two-car garage in under 6 months. Drawings were ready in 10 days — faster than any local firm we contacted."
"The JADU drawings included everything the city required. Submitted day 11, approved six weeks later. Tenant moved in two months after that."
Client first names and last initials only. Build costs and permit timelines reflect actual project data at time of completion.
Building Code
Commerce City Climate Zone & Energy Code
Colorado Energy Code — Colorado requires jurisdictions to adopt and enforce the 2021 International Energy Conservation Code (IECC) and the Model Electric-Ready and Solar-Ready Code, transitioning to the Model Low Energy and Carbon Code by July 2026.
Compare Cities
Commerce City vs. Nearby Colorado Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Drawings |
|---|---|---|---|---|---|
| Commerce City ← you | $230 | $2,200+ | $1,550/mo | 6.8% | From $997 |
| Thornton | $350 | $2,200+ | $1,486/mo | 6.8% | View → |
| Westminster | $475 | $9,234+ | $1,660/mo | 6.0% | View → |
| Northglenn | $300 | $2,114+ | $1,418/mo | 6.6% | View → |
| Brighton | $300 | $1,000+ | $1,539/mo | 5% | View → |
Frequently Asked
Commerce City ADU Questions
How much does it cost to build an ADU in Commerce City? +
What is the maximum ADU size allowed in Commerce City? +
How long does the ADU permit process take in Commerce City? +
Do I need owner-occupancy to build an ADU in Commerce City? +
What's the rental income potential for an ADU in Commerce City? +
How much does it cost to get ADU drawings in Commerce City? +
What drawings are included in the permit set? +
Can I convert my garage to an ADU in Commerce City? +
What neighborhoods in Commerce City are best for ADU investment? +
Is Commerce City ADU-friendly? +
How much will an ADU increase my property value in Commerce City? +
Can I use my Commerce City ADU as a short-term rental (Airbnb / VRBO)? +
Commerce City has a high HOA rate (44%) — do I need HOA approval for an ADU? +
Does Commerce City's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Commerce City? +
More Services in Commerce City
Start Your Commerce City ADU Today
Permit-ready drawings from $997. Delivered in 10 business days. Designed for Commerce City's building department. 14-day money-back guarantee.
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