ADU Design Resource · Berthoud, CO
The Complete Guide to
Building an ADU in Berthoud, CO
Everything Berthoud 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 Berthoud, CO ADUs
Market Context
Berthoud has a median home value of $550,000. Adding an ADU typically increases that by 30% — approximately $165,000 in added equity. A 1-bedroom ADU in Berthoud rents for approximately $1,412/month in the Larimer County rental market , yielding a 6% cap rate on the investment. Occupancy averages 100% in this market.
Top Berthoud neighborhoods for ADU investment include Heritage Ridge, Rose Farm Acres, Farmstead, Prairie Star, Vantage. Dense single-family enclave on Berthoud's south side with affordable starter homes and proximity to Berthoud High School, supporting strong family rental ADU demand. Mature neighborhood directly south of the high school within walking distance of downtown Berthoud jobs and schools, with larger legacy lots ideal for detached ADUs.
Permit Process
Permit applications are reviewed by the Building Department . Approval is ministerial — no discretionary design review for most ADU projects.
Berthoud outsources plan review to SAFEbuilt (ProCode), which means your ADU drawings get reviewed by contractors who aren't in-house city staff — so questions and corrections often bounce through an extra email layer instead of a quick desk conversation, slowing things down compared to cities with in-house reviewers. Since Berthoud Fire runs its own separate 15-business-day review outside the main building permit process, your ADU can clear the building department's checklist and still sit waiting on fire sign-off, especially if the property is on a well or has limited hydrant access common in the older parts of town near 4th Street. Also budget for a real water tap or meter upgrade fee — Berthoud requires a separate water assessment for any new dwelling unit, and that cost isn't included in the base $993.75 permit fee, so it often surprises homeowners who only budgeted off the building department's posted schedule.
"In my experience with Berthoud permit files, both that timeline and the per-square-foot cost you're seeing are state-level estimates, not verified local figures—I'd get quotes from two or three Berthoud-based contractors and call the Building Department directly before penciling in a budget or start date. With no confirmed timeline listed and HOA coverage sitting around 40% in this area, don't assume your lot is HOA-free until you've actually pulled the covenants, since that review can quietly add weeks the state data won't capture."
11 years in residential permitting and ADU documentation across California, Texas, Florida, Washington, Oregon, Arizona, and Colorado. This guide was researched and verified against Berthoud's building department records and current 2026 Colorado's HB24-1152 ADU law.
Property Eligibility
Is My Berthoud, CO Property Eligible for an ADU?
Berthoud 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 Berthoud under Colorado's HB24-1152 (2024). No owner-occupancy requirement in Berthoud — you can rent both units as investment properties. Colorado doesn't set a fixed statutory review-day count — confirm the current timeline with the Building Department.
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 Berthoud's local rules. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 40% of Berthoud 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.
Always verify eligibility with Building Department before designing.
Free — No Obligation
Will Berthoud Approve an ADU on Your Lot?
Send us the address and we’ll check it against Berthoud’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 Berthoud 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
Berthoud ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Berthoud 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 × 30% 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 Department (source ↗), Zillow Rental Market Reports, and public state/local housing data. Last verified: 2026-08-15.
Local Market Data
Top Berthoud Neighborhoods for ADU Investment
Heritage Ridge
Dense single-family enclave on Berthoud's south side with affordable starter homes and proximity to Berthoud High School, supporting strong family rental ADU demand.
Rose Farm Acres
Mature neighborhood directly south of the high school within walking distance of downtown Berthoud jobs and schools, with larger legacy lots ideal for detached ADUs.
Farmstead
Newer SFH-only community with no metro district overhead, modern layouts engineered for accessory structures, and strong young-family rental demand.
Prairie Star
Master-planned community on Berthoud's north side with larger estate lots and I-25 commuter access to Fort Collins/Loveland employers, supporting long-term tenant demand.
Vantage
Family-oriented D.R. Horton SFH neighborhood with 3-5 bedroom homes that pair well with ADUs for multigenerational or rental living near growing employers.
Berthoud Heights
Older, well-established subdivision near downtown Berthoud with mature lots that already meet Larimer County's ADU-friendly lot-size thresholds.
Berthoud Heights West
Quiet family-friendly western extension of Berthoud Heights with consistent SFH density and easy commute access to Loveland and Longmont job centers.
Heron Lakes at TPC Colorado
Luxury golf-course master-planned community with custom estate lots; ADU upside is limited by HOA covenants but premium rental demand exists for resort tenants.
Legacy Heights
Established neighborhood with predominantly single-family homes and proximity to schools, suitable for homeowners adding rental ADUs for supplemental income.
Mountain Views
Scenic hillside neighborhood of newer single-family homes; smaller lots limit detached ADUs, but attached/converted ADUs are viable for the view-premium rental niche.
Berthoud ADU Market at a Glance
Local Zoning Rules
2026 Berthoud ADU Rules
Berthoud's 2026 ADU ordinance caps new units at 850 sq ft and 25 ft of height — on the tighter side, which narrows floor plan options. Setbacks run 5 ft side and 5 ft rear, close to the regional baseline. Berthoud 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 vary by project valuation — in line with what most homeowners budget for permitting through Building Department. Submit directly to the department online — link below.
| Regulation | Berthoud Allowance |
|---|---|
| Max ADU Size | 850 sq ft |
| Max Height | 25 ft |
| Side Setback | 5 ft |
| Rear Setback | 5 ft |
| Architect / Engineer Stamp | Not required under the size cap* |
| Owner Occupancy | Not required |
| Short-Term Rental | Permitted |
| Coastal Overlay | No |
| Design Review | No |
| HOA Prevalence | 40% of properties |
| Permit Fees | Varies by project valuation |
*Load-bearing modifications to the existing house always need an engineer stamp regardless of ADU size. Data verified 2026-08-15T06:10:50.038Z. Always confirm with the Building Department before designing.
Berthoud Permit Process
Berthoud ADU Permit Timeline & Fees
Local Financing Resources
Local ADU Lenders in Berthoud
These lenders offer HELOC, construction, and renovation loans for ADU projects in Larimer County. Compare terms before committing.
Berthoud branch (opened 2018); federally insured Larimer/Weld County credit union offering Home Equity Loans among its core products — flexible equity funding for an ADU build.
Visit Lender ↗Physical Berthoud branch (970-532-9830); full-service Colorado bank providing construction, mortgage, and personal lending through its Berthoud location.
Visit Lender ↗One-Time Close construction-to-permanent loan covering lot + construction + permanent financing, no maximum loan amount, with rate lock at construction start.
Visit Lender ↗Interest-Only HELOC and Platinum HELOC starting at 6.75% APR with a 25-year term (10-yr draw / 15-yr repay); combined LTV typically 80–90% — well-suited to fund ADU builder draws.
Visit Lender ↗Specialty national ADU lender active in Colorado; RenoFi Loans are underwritten on post-construction value with terms up to 20 years, specifically designed for ADU construction and conversion.
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 Berthoud
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 Berthoud 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 Department.
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 Department. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Berthoud ADU Package
Engineered for CO Permit Approvals
What You Get
Berthoud ADU Drawings — What's Included
How our permit-ready drawing sets compare to hiring a local architect in Berthoud:
| 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 Berthoud 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 $1,412/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 Berthoud'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 Department. 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 Berthoud.
Build costs reflect local construction data for Berthoud. Client names are initials only. Permit timelines are project-specific and may vary.
"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."
Representative scenarios. Build costs modeled using Berthoud construction data (city-verified data) and Building Department. Outcomes vary by project scope and site conditions.
Building Code
Berthoud Climate Zone & Energy Code
Berthoud, Colorado is not in California, so California Title 24 does not apply; instead, the Town of Berthoud adopts the 2024 International Energy Conservation Code (IECC 2024) via its 2024 I-Code Amendment (Chapter 11 BUILDING REGULATIONS), which includes Appendix RM (Colorado Model Electric and Solar Ready Code-Residential) for residential compliance. Colorado also enacted a statewide bill requiring jurisdictions to adopt a Model Low Energy and Carbon Code (MLECC) or equivalent after July 1, 2026.
Compare Cities
Berthoud vs. Nearby Colorado Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Eligibility |
|---|---|---|---|---|---|
| Berthoud ← you | — | — | $1,412/mo | 6% | Free check → |
| Fort Collins | $300 | $10,320+ | $1,620/mo | 5.5% | View → |
| Loveland | $215 | $2,200+ | $1,463/mo | 5.2% | View → |
| Wellington | — | $8,900+ | $1,400/mo | 6% | View → |
| Denver | $250 | $2,200+ | $1,588/mo | 5.8% | View → |
Frequently Asked
Berthoud ADU Questions
How much does it cost to build an ADU in Berthoud? +
What is the maximum ADU size allowed in Berthoud? +
How long does the ADU permit process take in Berthoud? +
Do I need owner-occupancy to build an ADU in Berthoud? +
What's the rental income potential for an ADU in Berthoud? +
How much does it cost to get ADU drawings in Berthoud? +
What drawings are required for an ADU permit in Berthoud? +
Can I convert my garage to an ADU in Berthoud? +
What neighborhoods in Berthoud are best for ADU investment? +
Is Berthoud ADU-friendly? +
How much will an ADU increase my property value in Berthoud? +
Can I use my Berthoud ADU as a short-term rental (Airbnb / VRBO)? +
Berthoud has a high HOA rate (40%) — do I need HOA approval for an ADU? +
Does Berthoud's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Berthoud? +
More Services in Berthoud
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