Garage Conversion Drawings · Boulder, CO
Permit-Ready Garage Conversion
Drawings for Boulder, CO
Convert your garage into permitted living space or a rental unit. We deliver complete, code-compliant drawing sets ready for Boulder's building department — in 10 business days, starting at $997.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Boulder Homeowners Need to Know Before Submitting
Size & Zoning Rules
Converting your garage to a legal rental unit means the finished space must comply with Boulder's ADU size limits. Boulder's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
Boulder 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 Boulder can command approximately $1,700/month as a 1-bedroom rental — far more than leaving the space as storage.
Permit Process & Fees
Planning & Development Services permit fees for this project type typically range from $22,977 to $25,469 depending on project valuation and scope. Plan check runs approximately 6 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Garage conversion drawings submitted to Planning & Development Services 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 Planning & Development Services ↗Construction Cost Context
Boulder's garage conversion construction costs run $168–$269 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 Boulder
Boulder's Residential Growth Management system caps how many detached units can get building permits each year, so even a fully compliant ADU application can sit in a queue behind other projects citywide. Because short-term rentals are banned here, Planning & Development Services will also require you to sign a deed restriction affirming long-term occupancy only, which some lenders and title companies flag during refinancing. On top of that, many older Boulder neighborhoods still run on shared sewer laterals, so you'll likely need a sewer scope inspection before the city signs off on utility connections — a step that catches most homeowners off guard.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that $210/sqft and the 6-week plan check are Boulder state-level averages, not numbers I'd bank on for your specific lot — I'd call Planning & Development Services directly and get at least two local contractor quotes before penciling out your budget. I've also seen plenty of "6-week" submittals stretch to 10-12 weeks once corrections come back, especially if the drawing set isn't fully dialed in on the first pass."
Market Context
Boulder has a median home value of $860,000. Comparable renovation projects in this market typically add 23.0% to resale value.
Neighborhoods in Boulder with the strongest garage conversion and rental-unit potential include University Hill, Old North Boulder, Newlands, West Pearl, Mapleton Hill. Extremely strong rental demand from CU Boulder students and faculty, making small ADUs highly rentable.
Permit Process
Permit applications are reviewed by the Planning & Development Services, with a plan check timeline of approximately 6 weeks. Permit fees in Boulder range from $22,977 to $25,469 depending on project scope. Design review: Yes - in historic districts/individually designated historic properties only (otherwise ADUs are approved through standard building permit process).
Boulder falls within Seismic Design Category B, which affects structural requirements for converted garage walls and foundations.
Local Financing Resources
Local Garage Conversion Lenders in Boulder
These lenders offer HELOC, construction, and renovation loans for garage conversion projects in Boulder County. Compare terms before committing.
Offers HELOCs and home equity loans in Colorado; rates shown as low as 6.99% variable APR and 7.99% fixed APR; local underwriting and construction lending available in Colorado.
Visit Lender ↗Provides home equity loans and HELOCs in its Colorado lending area (CLTV limits: HELOCs to 75%, home equity loans to 80% CLTV); credit-line range typically $15,000–$1,000,000.
Visit Lender ↗Home Equity ChoiceLine (HELOC/HELOAN hybrid) with options to lock fixed-rate advances; membership required and no‑closing‑cost option has a $5,000 initial advance requirement.
Visit Lender ↗Offers standard and variable-rate HELOCs (sample APR ranges shown ~6.50%–9.99%), with draw periods and repayment terms suitable for remodels and renovation projects in Colorado.
Visit Lender ↗Specialty renovation financing that uses After Renovation Value (ARV) to increase borrowing power; RenoFi operates via credit union partners in Colorado and lists Boulder contractor partners (example loan scenarios up to ~$500k; terms up to 20 years).
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 Boulder
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 Boulder Garage Conversion Package
Transparent Pricing
Boulder 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 Boulder's building department requirements and CO code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Planning & Development Services. We support plan check corrections at no extra charge.
Common Questions
Boulder Garage Conversion FAQs
Is a garage conversion allowed in Boulder? +
Yes — garage conversions are permitted in Boulder. 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 Boulder? +
Garage conversions in Boulder typically range from $110,000 to $242,000 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 Boulder? +
Boulder'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 Boulder? +
Plan check in Boulder typically takes approximately 6 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 Boulder? +
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 Boulder'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 Boulder? +
Our permit-ready garage conversion drawing packages for Boulder 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 Boulder'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 Boulder? +
A permitted garage conversion in Boulder adds rentable square footage to a home currently valued around $860,000. 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 Boulder
Need full ADU design drawings instead?
Next Steps
Ready to Move Forward With Your Boulder 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 Planning & Development Services.
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 Planning & Development Services. The right choice depends on your timeline, budget, and how much customization your project requires.