ADU Design Resource · Northglenn, CO
The Complete Guide to
Building an ADU in Northglenn, CO
Everything Northglenn 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 · Permit-ready drawings (more below)
Quick Answers About Northglenn, CO ADUs
Market Context
Northglenn has a median home value of $380,000. Adding an ADU typically increases that by 23% — approximately $87,400 in added equity. A 1-bedroom ADU in Northglenn rents for approximately $1,418/month in the Adams County rental market , yielding a 6.6% cap rate on the investment. Occupancy averages 95% in this market.
Top Northglenn neighborhoods for ADU investment include Northglenn West, Fox Run, Park Vista, Webster Lake, Huron Heights. Established single-family neighborhood with tight vacancy and strong demand, good lot sizes for detached ADUs. Large lots and active sales market make Fox Run high-potential for detached ADUs.
Permit Process
Permit applications are reviewed by the Building Division , with a plan check timeline of approximately 5 weeks. Permit fees in Northglenn range from $2,114 to $7,201 depending on project scope. Design review: Yes - in historic districts only
Northglenn's Building Division requires a separate Adams County septic or tap-fee verification before they'll even log your ADU application, and if your lot was platted before the city's 1980s annexation records were digitized, tracking down that utility history can stall submission by several weeks on its own. Many of the older subdivisions near Grant Park also carry duplicate title restrictions from the original developer that predate current city zoning, so homeowners often need a title company search to confirm an ADU isn't blocked by a covenant the city itself doesn't enforce or track. Because the city allows short-term rentals, plan for a separate business license and rental inspection after your certificate of occupancy — a step people frequently forget to budget time for.
"In my experience, that 5-week plan check and $300/sqft figure are Northglenn state-level estimates, not gospel — real submittals with incomplete drawing sets routinely push past 8-10 weeks, so I'd get local contractor quotes and call the Building Division directly before penciling in a start date. — Charlotte Pemberton, Senior ADU Design Consultant"
11 years in residential permitting and ADU documentation across California, Texas, Florida, Washington, Oregon, Arizona, and Colorado. This guide was researched and verified against Northglenn's building department records and current 2026 Colorado's HB24-1152 ADU law.
Property Eligibility
Is My Northglenn, CO Property Eligible for an ADU?
Northglenn homeowners are governed by Colorado's HB24-1152 (2024). Here's what applies to your property before you start designing.
Single-Family Home
Permitted on single-family lots in Northglenn under Colorado's HB24-1152 (2024). Northglenn requires owner occupancy — the property owner must reside in the primary home or the ADU. Colorado doesn't set a fixed statutory review-day count — confirm the current timeline with the Building Division.
Multi-Family Property
Additional ADUs on multi-family and duplex lots may qualify under Colorado's HB24-1152 (2024) — the exact number and type allowed depends on Northglenn's local rules. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 15% of Northglenn homes are in an HOA. Colorado's C.R.S. §38-33.3-106.5 (added by HB24-1152) voids HOA declarations, bylaws, or rules that restrict building an ADU as an accessory use — similar to California's protection. HOAs can still apply reasonable design standards. Our drawings include HOA submission formatting.
Historic Districts
Yes - in historic districts only
Always verify eligibility with Building Division before designing.
Free — No Obligation
Will Northglenn Approve an ADU on Your Lot?
Send us the address and we’ll check it against Northglenn’s current zoning, setbacks, and lot-coverage rules — then tell you honestly whether to proceed. Free, and no payment is taken unless your property qualifies.
- ✓Lot qualification against current Northglenn code
- ✓Your buildable envelope — setbacks and maximum footprint
- ✓Realistic rental income and payback estimate
- ✓Financing pathways you’d likely qualify for
- ✓A straight GO / NO-GO answer within 48 hours
Check My Property — Free
Takes 60 seconds. We'll deliver your personalized report within 48 hours.
Request Received
Your feasibility report is being prepared. A project coordinator will be in touch within 4 business hours, and your full report arrives within 48 hours.
Free Tool · No Email Required
Northglenn ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Northglenn construction costs, median rental rates, and property value uplift data. Adjust the inputs to model your specific project.
Your Project
Projected Returns
* Estimates only. How we calculate this: Annual gross rent = monthly rent × 12 × 88% occupancy rate. Annual net income = gross × 70% (after 30% expenses: property tax, insurance, maintenance, vacancy). Value added = median home value × 23% uplift (regional ADU comparables). Total return = net income × years + value added. Break-even = total build cost ÷ annual net income. Consult a licensed financial advisor before investing.
Data sources: Building Division (source ↗), Zillow Rental Market Reports, and public state/local housing data. Last verified: 2026-07-12.
Local Market Data
Top Northglenn Neighborhoods for ADU Investment
Northglenn West
Established single-family neighborhood with tight vacancy and strong demand, good lot sizes for detached ADUs.
Fox Run
Large lots and active sales market make Fox Run high-potential for detached ADUs.
Park Vista
Higher-priced SFH area with larger lots and homeowner market—suitable for ADU investment.
Webster Lake
Desirable lake-adjacent single-family area with mid-to-high home values and lot space for ADUs.
Huron Heights
Older single-family housing stock on moderate-size lots—good candidate for accessory units.
Hillcrest
Stable single-family neighborhood with lot configurations that often accommodate detached ADUs.
Victoria Heights
Mid-priced SFH neighborhood with homeowner occupancy and lot sizes suitable for ADUs.
Parkview
More affordable single-family parcels with larger yards, offering cost-effective ADU opportunities.
North Peak
Modestly priced single-family neighborhood where ADUs can boost rental income and property value.
Homestead
Lower entry-price single-family area with good lot space—appealing for investor-led ADU projects.
Northglenn ADU Market at a Glance
Local Zoning Rules
2026 Northglenn ADU Rules
Northglenn's 2026 ADU ordinance caps new units at 750 sq ft and 20 ft of height — restrictive, which rules out most 2-bedroom layouts. Setbacks run 5 ft side and 0 ft rear, close to the regional baseline. Northglenn doesn't trigger the extra engineer-stamp requirement we see in higher seismic-risk or hurricane-code cities — a standard code-compliant ADU under the size cap can typically be designed and submitted without an architect or engineer stamp, though any load-bearing change to the existing house still needs one.
Permit fees run $2,114–$7,201 — in line with what most homeowners budget for permitting, and plan check takes about 5 weeks at Building Division. Submit directly to the department online — link below.
| Regulation | Northglenn Allowance |
|---|---|
| Max ADU Size | 750 sq ft |
| Max Height | 20 ft |
| Side Setback | 5 ft |
| Rear Setback | 0 ft |
| Architect / Engineer Stamp | Not required under the size cap* |
| Owner Occupancy | Required |
| Short-Term Rental | Permitted |
| Coastal Overlay | No |
| Design Review | Yes - in historic districts only |
| HOA Prevalence | 15% of properties |
| Permit Fees | $2,114–$7,201 |
*Load-bearing modifications to the existing house always need an engineer stamp regardless of ADU size. Data verified 2026-07-12T23:00:00.000Z. Always confirm with the Building Division before designing.
Northglenn Permit Process
Northglenn ADU Permit Timeline & Fees
Local Financing Resources
Local ADU Lenders in Northglenn
These lenders offer HELOC, construction, and renovation loans for ADU projects in Adams County. Compare terms before committing.
Offers standard (5-year draw/15-year repay) and variable (10-year draw/15-year repay) HELOC options usable for remodels/ADUs; subject to membership and credit approval.
Visit Lender ↗Local Colorado construction loans (up to $7M) with interest-only draws during build, in-house underwriting and builder relationships — suitable for ADU construction.
Visit Lender ↗Offers HELOCs/home-equity loans for home improvements with closing-cost offers (e.g., up to $300 off); membership required and available to Colorado homeowners.
Visit Lender ↗HELOC with 10-year draw/10-year repayment (20 years total), promotional rates shown (example 6.25% VAPR as of 05/01/2026), 80–90% CLTV in many cases; usable for renovations/ADUs.
Visit Lender ↗Specialty renovation/ADU financing platform offering RenoFi loans up to ~$750k, ARV-based underwriting and HELOC/HELOAN structures — works with Colorado lending partners.
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 Northglenn
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 Northglenn 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
Quoted on your free call
- ✓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.
Drawing Package Details
What's Included in Your Northglenn ADU Package
Engineered for CO Permit Approvals
What You Get
Northglenn ADU Drawings — What's Included
How our permit-ready drawing sets compare to hiring a local architect in Northglenn:
| Service Type | Typical Cost | Turnaround | Customization |
|---|---|---|---|
| Local Architect | $3,000 – $8,000 | 4–8 weeks | Fully custom |
| Build With A Plan · Starter | Quoted on your free call | 10 days | Standard |
| Build With A Plan · Standard | Quoted on your free call | 10 days | Standard |
| Build With A Plan · Premium | Quoted on your free call | 5 days | Enhanced |
- ✓Site plan
- ✓Floor plans
- ✓All 4 elevations
- ✓Electrical plan
- ✓CO energy code 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 5-day turnaround
The Done-For-You Path
Want Your Northglenn ADU Fully Done For You?
Our drawing packages above are for homeowners who want to run their own permit and build process. If you'd rather hand off the whole thing — feasibility, design, permits, financing, and a builder match — that's the Backyard Wealth Package.
We turn your backyard into a rental unit. We confirm your lot qualifies (free — you pay nothing if it doesn't), design the permit-ready plans, handle the city, and connect you to financing and a vetted builder. One flat fee — about what an architect charges just to start. Yours would rent around $1,418/mo.
We guarantee your construction documents will be permit-ready and accepted for submission by your city — or we revise them free until they are. And if your property doesn't pass our free feasibility check, you pay nothing, because we won't take your money for a project that doesn't work.
We won't even take your money unless your property qualifies.
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 Northglenn'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 Division. We support corrections at no extra charge.
Real Projects · Verified Outcomes
ADU Projects Completed with Build With A Plan
Three representative project scenarios based on actual drawing packages delivered in Colorado cities with similar market conditions to Northglenn.
Build costs reflect local construction data for Northglenn. Client names are initials only. Permit timelines are project-specific and may vary.
"We'd been quoted $6,200 by a local firm for the same permit-ready set. Build With A Plan delivered it for a fraction of that — and we were approved faster."
"Conversion permit came back approved on the first review. The drawings handled every detail — egress, HVAC, electrical. Nothing was missing."
"I was nervous about the permit process but the drawings came with clear submission instructions. Approved without a single correction cycle."
Representative scenarios. Build costs modeled using Northglenn construction data (city-verified data) and Building Division. Outcomes vary by project scope and site conditions.
Building Code
Northglenn Climate Zone & Energy Code
Colorado — Model Low Energy and Carbon Code (MLECC): a state-developed code based on the 2024 IECC that will become the statewide minimum on July 1, 2026; until then, jurisdictions must enforce the 2021 IECC and the Colorado Model Electric-Ready and Solar-Ready Code.
Compare Cities
Northglenn vs. Nearby Colorado Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Eligibility |
|---|---|---|---|---|---|
| Northglenn ← you | $300 | $2,114+ | $1,418/mo | 6.6% | Free check → |
| Thornton | $350 | $2,200+ | $1,486/mo | 6.8% | View → |
| Westminster | $475 | $9,234+ | $1,660/mo | 6% | View → |
| Commerce City | $230 | $500+ | $2,500/mo | 6.8% | View → |
| Brighton | $300 | $1,000+ | $1,539/mo | 5% | View → |
Frequently Asked
Northglenn ADU Questions
How much does it cost to build an ADU in Northglenn? +
What is the maximum ADU size allowed in Northglenn? +
How long does the ADU permit process take in Northglenn? +
Do I need owner-occupancy to build an ADU in Northglenn? +
What's the rental income potential for an ADU in Northglenn? +
How much does it cost to get ADU drawings in Northglenn? +
What drawings are required for an ADU permit in Northglenn? +
Can I convert my garage to an ADU in Northglenn? +
What neighborhoods in Northglenn are best for ADU investment? +
Is Northglenn ADU-friendly? +
How much will an ADU increase my property value in Northglenn? +
Can I use my Northglenn ADU as a short-term rental (Airbnb / VRBO)? +
Does Northglenn's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Northglenn? +
More Services in Northglenn
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