Garage Conversion Drawings · Wilsonville, OR
Permit-Ready Garage Conversion
Drawings for Wilsonville, OR
Convert your garage into permitted living space or a rental unit. We deliver complete, code-compliant drawing sets ready for Wilsonville's building department — in 10 business days, starting at $997.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Wilsonville Homeowners Need to Know Before Submitting
Size & Zoning Rules
Converting your garage to a legal rental unit means the finished space must comply with Wilsonville's ADU size limits. Wilsonville's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
Wilsonville 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 Wilsonville can command approximately $1,442/month as a 1-bedroom rental — far more than leaving the space as storage.
Permit Process & Fees
Community Development Department permit fees for this project type typically range from $64,002 to $65,050 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 Community Development Department 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 Community Development Department ↗Construction Cost Context
Wilsonville's garage conversion construction costs run $176–$260 per square foot — a moderate 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 Wilsonville
Wilsonville's Community Development Department requires a separate Systems Development Charge (SDC) review for ADUs, and because the city sits in Seismic Zone D, your engineer will need to detail specific lateral bracing connections that go beyond standard Oregon residential code — this alone can add a plan review cycle if your first submission doesn't address it. Since many Wilsonville lots were platted with shared utility easements from the city's master-planned neighborhoods (especially in Villebois and Frog Pond), you'll also want to confirm your ADU's septic or sewer lateral doesn't cross a neighbor's easement line, which can trigger a separate encroachment permit through Clackamas County records. If you're planning to use the ADU as a short-term rental, know that Wilsonville's business license and transient lodging tax registration are handled separately from the building permit, so people often finish construction only to discover they can't legally start renting for another few weeks.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that 4-week plan check and $220/sqft figure are Wilsonville state-level estimates, not local truth — I'd call the Community Development Department directly and get at least two local contractor quotes before penciling out your budget, since incomplete drawing sets routinely push timelines past 8 weeks here. The good news is no coastal overlay to worry about, but with HOA presence at 25%, don't forget to check your CC&Rs on STRs even though the jurisdiction allows them."
Market Context
Wilsonville has a median home value of $530,000. Comparable renovation projects in this market typically add 25% to resale value.
Neighborhoods in Wilsonville with the strongest garage conversion and rental-unit potential include Villebois, Frog Pond, Frog Pond West, Charbonneau, Old Town. Large master-planned single-family neighborhood with high density and proximity to WES transit and retail.
Permit Process
Permit applications are reviewed by the Community Development Department, with a plan check timeline of approximately 4 weeks. Permit fees in Wilsonville range from $64,002 to $65,050 depending on project scope. Design review: Other - No citywide design-review requirement; ADUs are reviewed ministerially under clear-and-objective standards, but local design standards/pattern books (and DRB/pattern-book review) continue to apply in specific areas such as Old Town, Villebois (Village zone) and Frog Pond..
Wilsonville falls within Seismic Design Category D, which affects structural requirements for converted garage walls and foundations.
Local Financing Resources
Local Garage Conversion Lenders in Wilsonville
These lenders offer HELOC, construction, and renovation loans for garage conversion projects in Clackamas County. Compare terms before committing.
EquityFlex HELOC with a 10-year draw and 20-year repayment; variable APRs shown in May 2026 in the ~6.75%–9.25% range depending on LTV and credit; serves Oregon (including SW Portland metro).
Visit Lender ↗HELOC lines start at $10,000 with 10-year draw/20-year repayment; up to ~80% of available equity and options to lock segments to fixed rates.
Visit Lender ↗HELOC with 10-year draw/20-year repayment, minimum $5,000, closing costs vary, and up to 95% LTV/CLTV available subject to credit and collateral.
Visit Lender ↗ADU-focused lending platform that arranges HELOC/renovation loans through partner lenders in Oregon; sample RenoFi HELOC pricing referenced (example 8.5% sample variable rate; lender terms vary).
Visit Lender ↗Regional bank offering construction and renovation financing explicitly listing accessory dwelling units (ADUs); serves OR and has a Wilsonville branch.
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 Wilsonville
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 Wilsonville Garage Conversion Package
Transparent Pricing
Wilsonville 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 Wilsonville's building department requirements and OR code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Community Development Department. We support plan check corrections at no extra charge.
Common Questions
Wilsonville Garage Conversion FAQs
Is a garage conversion allowed in Wilsonville? +
Yes — garage conversions are permitted in Wilsonville. Oregon 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 Wilsonville? +
Garage conversions in Wilsonville 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 Wilsonville? +
Wilsonville'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 Wilsonville? +
Plan check in Wilsonville 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 Wilsonville? +
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 Wilsonville'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 OR energy code requirements, which we handle in the Title 24 compliance documentation.
How much does it cost to get garage conversion drawings in Wilsonville? +
Our permit-ready garage conversion drawing packages for Wilsonville start at $997. Local architects typically charge $2,500–$6,000 for the same set. Every package is engineered for OR code compliance and formatted for Wilsonville'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 Wilsonville? +
A permitted garage conversion in Wilsonville adds rentable square footage to a home currently valued around $530,000. 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 Wilsonville
Need full ADU design drawings instead?
Next Steps
Ready to Move Forward With Your Wilsonville 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 Community Development 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
$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 Community Development Department. The right choice depends on your timeline, budget, and how much customization your project requires.