Garage Conversion Drawings · Tualatin, OR
Permit-Ready Garage Conversion
Drawings for Tualatin, OR
Convert your garage into permitted living space or a rental unit. We deliver complete, code-compliant drawing sets ready for Tualatin's building department — in 10 business days, starting at $997.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Tualatin Homeowners Need to Know Before Submitting
Size & Zoning Rules
Converting your garage to a legal rental unit means the finished space must comply with Tualatin's ADU size limits. Tualatin's current ADU size cap is 900 sq ft — within the typical range for most floor plan configurations.
Tualatin 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 Tualatin can command approximately $1,614/month as a 1-bedroom rental — far more than leaving the space as storage.
Permit Process & Fees
Building Division permit fees for this project type typically range from $19,885 to $30,324 depending on project valuation and scope. Plan check runs approximately 7 weeks — though each correction cycle adds 3–6 weeks, which is why code-compliant drawings matter so much.
Garage conversion drawings submitted to Building Division 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 Building Division ↗Construction Cost Context
Tualatin's garage conversion construction costs run $210–$336 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 Tualatin
Tualatin's seismic zone D designation means your engineer has to run full site-specific calculations for SDS and Seismic Design Category rather than using default tables, which often adds real engineering hours and cost before the Building Division will even log your plans as complete. Because many Tualatin lots sit on Clean Water Services (CWS) service lines rather than straight city sewer, you'll also need a separate CWS Service Provider Letter confirming capacity — a step homeowners often forget until their permit gets kicked back for missing paperwork. If your ADU is detached and near the rear property line, double-check setback allowances against Tualatin Development Code Chapter 68, since it treats detached ADUs differently from attached ones on fire separation distance.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience with Tualatin submittals, that 7-week plan check figure and the $300/sqft cost are both state-level estimates rather than verified local numbers, so I'd call the Tualatin Building Division directly and get a couple of local contractor bids before penciling in a budget or schedule. Even with clean plans, I've routinely seen first-round corrections push that timeline past 8 weeks, so build in a cushion. — Charlotte Pemberton, Senior ADU Design Consultant"
Market Context
Tualatin has a median home value of $510,000. Comparable renovation projects in this market typically add 25% to resale value.
Neighborhoods in Tualatin with the strongest garage conversion and rental-unit potential include Rosewood, Cook Park, Durham Road, Southview, Lake Forest. High single-family density and proximity to major transit lines create strong rental demand for commuters.
Permit Process
Permit applications are reviewed by the Building Division, with a plan check timeline of approximately 7 weeks. Permit fees in Tualatin range from $19,885 to $30,324 depending on project scope. Design review: No - Planning Division land-use approval (ministerial); ARB not generally required; special overlays (e.g., historic districts) may require additional review.
Tualatin falls within Seismic Design Category Seismic Zone D (City of Tualatin states 'All of Tualatin is located in seismic zone D - Default'; designers must verify SDS and determine the Seismic Design Category per ASCE 7/OSSC), which affects structural requirements for converted garage walls and foundations.
Local Financing Resources
Local Garage Conversion Lenders in Tualatin
These lenders offer HELOC, construction, and renovation loans for garage conversion projects in Washington County. Compare terms before committing.
Offers an EquityFlex Line of Credit with limits up to $150,000 for interest-only options, suitable for home upgrades.
Visit Lender ↗Provides HELOCs with up to 95% LTV and a 10-year draw period, serving members directly in Tualatin.
Visit Lender ↗Specialized BackHome ADU loan offering up to $175,000 with 100% financing and no income restrictions.
Visit Lender ↗Specializes in high-LTV renovation home equity loans that factor in the future value of the home after the ADU is built.
Visit Lender ↗Offers specific construction and renovation financing for accessory dwelling units (ADUs) with a single-closing process.
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 Tualatin
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 Tualatin Garage Conversion Package
Transparent Pricing
Tualatin 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 Tualatin's building department requirements and OR code. Delivered in 10 business days.
Submit to Your Building Dept
Download your complete package and submit to Building Division. We support plan check corrections at no extra charge.
Common Questions
Tualatin Garage Conversion FAQs
Is a garage conversion allowed in Tualatin? +
Yes — garage conversions are permitted in Tualatin. 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 Tualatin? +
Garage conversions in Tualatin typically range from $35,000 to $77,000 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 Tualatin? +
Tualatin'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 Tualatin? +
Plan check in Tualatin typically takes approximately 7 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 Tualatin? +
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 Tualatin'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 Tualatin? +
Our permit-ready garage conversion drawing packages for Tualatin 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 Tualatin'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 Tualatin? +
A permitted garage conversion in Tualatin adds rentable square footage to a home currently valued around $510,000. 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 Tualatin
Need full ADU design drawings instead?
Next Steps
Ready to Move Forward With Your Tualatin 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
$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 Building Division. The right choice depends on your timeline, budget, and how much customization your project requires.