Home Addition Drawings · Beaverton, OR
Permit-Ready Home Addition
Drawings for Beaverton, OR
Expand your home with a permitted room addition, second story, or family room extension. We deliver complete, code-compliant drawing sets for Beaverton's building department — in 10 business days, starting at $1,497.
14-day money-back guarantee · 10 business day turnaround
Local Intelligence
What Beaverton Homeowners Need to Know Before Submitting
Size & Zoning Rules
Any new square footage added to your Beaverton home counts against the same zoning envelope that governs ADU size, meaning large additions may affect your ability to add a future ADU. Beaverton's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
Beaverton does not impose an owner-occupancy requirement, so you can rent both the main home and any ADU or conversion as investment units.
If the addition creates a second unit or is later converted to a rental, Beaverton's ADU market supports approximately $1,695/month for a 2-bedroom unit.
Permit Process & Fees
Building Division permit fees for this project type typically range from $2,500 to $9,000 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.
Addition permit packages submitted to Building Division must include a site plan, floor plans, all four elevations, an electrical plan, and energy compliance documentation — plus stamped structural drawings are always required for any load-bearing elements, second-story work, or new foundation.
Visit Building Division ↗Construction Cost Context
Beaverton's home addition construction costs run $200–$420 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 Beaverton
Washington County's Clean Water Services adds a layer most homeowners don't expect: any ADU project that disturbs more than 500 square feet of ground often triggers a Service Provider Letter review before Beaverton's Building Division will even accept your permit application, and that can tack on 2-4 weeks upfront. Because the area sits in Seismic Design Category D, engineers here typically require site-specific lateral force calculations rather than prescriptive tables — this pushes structural drawings toward custom engineering fees that generic ADU cost guides never factor in. Also, since short-term rentals aren't allowed on ADUs in Beaverton, several lenders in the area will not count projected Airbnb income when qualifying homeowners for construction financing, which catches people off guard when they're planning to offset the build cost.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, that 7-week plan check timeline and the $275/sqft cost figure are Beaverton-area estimates, not gospel — I'd get at least two local contractor quotes and call the Building Division directly before penciling in a schedule. Even with a clean submittal, incomplete drawing sets are the norm rather than the exception here, so I'd budget extra weeks beyond that 7-week figure to avoid a frustrating surprise."
Market Context
Beaverton has a median home value of $472,000. Comparable renovation projects in this market typically add 25.0% to resale value.
Neighborhoods in Beaverton with the strongest home addition and resale value potential include Raleigh Hills, Murray Hill (Murrayhill), Sexton Mountain, West Beaverton, Cedar Hills. Older single-family lots and high home values make rental ADUs attractive.
Permit Process
Permit applications are reviewed by the Building Division, with a plan check timeline of approximately 7 weeks. Permit fees in Beaverton range from $2,500 to $9,000 depending on project scope. Design review: Other - design review applies to ADU new construction or additions where design review/ historic review is required; conversions are excluded.
Beaverton falls within Seismic Design Category Seismic Design Category D (typical for Portland–Beaverton area; site-specific SDC and spectral values must be determined using ASCE/USGS design maps as required by the OSSC), which affects structural requirements for any new addition tying into the existing structure.
Local Financing Resources
Local Home Addition Lenders in Beaverton
These lenders offer HELOC, construction, and renovation loans for home addition projects in Washington County. Compare terms before committing.
Offers HELOCs for home improvement/renovation; available to members at Beaverton branches—rates and approval depend on credit and home equity.
Visit Lender ↗Home Equity products with a 10-year draw/20-year repayment HELOC option; minimum loan amounts and local servicing in Washington County.
Visit Lender ↗Oregon CDFI with ADU loan programs (some options fund total project cost including permitting/design and may require no down payment in specific programs).
Visit Lender ↗Specialty ADU financing in Portland/Portland-metro: personal/ADU loans up to about $450,000 and options that may not require home equity.
Visit Lender ↗Specialty renovation fintech that partners with credit unions nationwide and offers Renovation HELOCs that use after-renovation value to increase borrowing power.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted Home Addition Contractors in Beaverton
We draw the plans. These contractors build the addition. 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 Beaverton Home Addition Package
Transparent Pricing
Beaverton Home Addition Drawing Packages
One-time fee. No retainer. No hourly billing.
- ✓Site plan
- ✓Floor plans (existing + proposed)
- ✓All 4 elevations
- ✓Electrical plan
- ✓Title 24 energy compliance
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Stamped structural drawings
- ✓Foundation plan
- ✓Roof framing plan
- ✓Window & door schedules
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓Cross-section details
- ✓Material specifications
- ✓HOA submission package
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
After You Order
Your Addition Drawings in 3 Steps
Submit Your Project Details
Share your property address, existing floor plan (if available), and the addition scope. We assign your project coordinator within 4 business hours.
We Draft Your Drawings
Our team designs your complete addition drawing set — engineered for Beaverton's building department requirements and OR CBC 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
Beaverton Home Addition FAQs
Do I need a permit for a home addition in Beaverton? +
Yes — any structural addition to your home in Beaverton requires a building permit. This applies to room additions, second-story additions, sunrooms, and attached garages. You'll need permit-ready drawings before the building department will accept your application. Our packages are formatted specifically for Beaverton's submittal requirements.
How much does a home addition cost in Beaverton? +
Home additions in Beaverton typically cost between $250.0–$350.0 per square foot depending on the scope, finishes, and structural complexity. A 600 sq ft addition ranges from $150,000 to $210,000. Second-story additions cost more than ground-floor extensions due to structural requirements. Our drawing packages start at $1,497 — a fraction of local architectural fees.
What drawings are required to permit a home addition in Beaverton? +
Beaverton's building department requires: a site plan showing the addition's footprint and setbacks, floor plans for all affected levels, all four exterior elevations, an electrical plan, and energy compliance (Title 24 in California). Structural plans stamped by a licensed engineer are required for any load-bearing elements — included in our Premium package.
How long does the permit process take for a home addition in Beaverton? +
Plan check in Beaverton typically takes 7 weeks for home additions. Additions with structural components may require additional review. Complete, code-compliant drawings significantly reduce correction cycles — each cycle adds 3–6 weeks. Our drawings are engineered to pass on the first submittal.
What setbacks apply to home additions in Beaverton? +
Beaverton enforces minimum setbacks from property lines for all additions: typically 4–5 ft side setbacks and 5 ft rear setbacks, though these vary by zoning district and lot size. Your addition must stay within the buildable envelope. Our site plan documents existing and proposed setbacks and flags any zoning variances required.
Do I need structural drawings for a home addition in Beaverton? +
Yes, for most additions. Any load-bearing walls, new foundations, second-story construction, or roof structure changes require stamped structural drawings from a licensed engineer. California's CBC (California Building Code) and seismic requirements make structural plans mandatory for most addition types. Our Standard and Premium packages include stamped structural drawings.
How much do home addition drawings cost in Beaverton? +
Our permit-ready home addition drawing packages for Beaverton start at $1,497. Local architects and designers typically charge $3,000–$10,000+ for comparable drawing sets. Every package is engineered for OR code compliance and formatted for Beaverton's building department. Turnaround is 10 business days with a 14-day money-back guarantee.
Will a home addition increase my home's value in Beaverton? +
In Beaverton, where median home values are approximately $472,000, a permitted home addition adds square footage that appraisers value as part of the home's gross living area. Return on investment varies by addition type — master suite additions, family room expansions, and additional bedrooms typically recoup 50–75% of project cost in appraised value in OR markets.
Can I add a second story to my home in Beaverton? +
Second-story additions are permitted in most Beaverton residential zones, subject to height limits and design review requirements. California generally requires ministerial permit approval, but some cities impose design compatibility or neighborhood compatibility review for second stories. Our drawings cover all levels including foundation upgrades, shear walls, and roof framing required for vertical additions.
Nearby Cities
Also Available in Beaverton
Adding an ADU instead? See our ADU design service.
Next Steps
Ready to Move Forward With Your Beaverton 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.