Home Addition Drawings · The Dalles, OR
Permit-Ready Home Addition
Drawings for The Dalles, OR
Expand your home with a permitted room addition, second story, or family room extension. We deliver complete, code-compliant drawing sets for The Dalles's building department — 14-day money-back guarantee.
14-day money-back guarantee · permit-ready delivery
Local Intelligence
What The Dalles Homeowners Need to Know Before Submitting
Size & Zoning Rules
Any new square footage added to your The Dalles home counts against the same zoning envelope that governs ADU size, meaning large additions may affect your ability to add a future ADU. The Dalles's current ADU size cap is 800 sq ft — within the typical range for most floor plan configurations.
The Dalles 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, The Dalles's ADU market supports approximately $1,397/month for a 2-bedroom unit.
Permit Process & Fees
Building Codes Services permit fees for this project type typically range from $3,000 to $4,500 depending on project valuation and scope.
Addition permit packages submitted to Building Codes Services 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 Codes Services ↗Construction Cost Context
The Dalles's home addition construction costs run $267–$400 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 The Dalles
Because Wasco County contracts building permits through Building Codes Services rather than a city-run office, homeowners often assume they can walk plans into City Hall — but you actually need to route through the county's process, which uses the 2026 fee schedule plus a new 3% tech surcharge added in August 2025. Many older lots in The Dalles were platted before modern water/sewer separation rules, so expect the county to require a site inspection confirming your ADU's sewer lateral doesn't cross under the existing house's foundation, a fix that can mean trenching through a finished basement. Since STRs are allowed here, plan ahead if you want to rent the ADU nightly — you'll still need to clear a separate STR registration with the county after your final building inspection, and that approval can lag weeks behind your certificate of occupancy.
Expert Verdict — Marcus Reid, Licensed Designer
"In my experience, the missing timeline and cost-per-square-foot figures here are a red flag rather than good news — these are likely unverified state-level placeholders, and I'd strongly advise calling Wasco County Building Codes Services directly and getting a couple of local contractor bids before you budget anything. What the data doesn't show is that even straightforward ADU submittals in The Dalles can see plan check stretch well past 8 weeks if the drawing set isn't complete on first pass."
Market Context
The Dalles has a median home value of $380,000. Comparable renovation projects in this market typically add 25% to resale value.
Neighborhoods in The Dalles with the strongest home addition and resale value potential include East Corridor (Hospital & College), Riverview, Downtown & Historic Core, Old Dufur / Richmond, East The Dalles. Anchored by Adventist Health Columbia Gorge and Columbia Gorge Community College, this corridor has steady year-round rental demand from healthcare workers, students, and faculty on modest SFH lots ideal for ADUs.
Permit Process
Permit applications are reviewed by the Building Codes Services. Permit fees in The Dalles range from $3,000 to $4,500 depending on project scope. Design review: Yes - in historic districts only.
The Dalles falls within Seismic Design Category C, which affects structural requirements for any new addition tying into the existing structure.
Local Financing Resources
Local Home Addition Lenders in The Dalles
These lenders offer HELOC, construction, and renovation loans for home addition projects in Wasco County. Compare terms before committing.
Local credit union with a The Dalles branch; HELOC as low as 6.99% APR with a 10-year draw / 20-year repayment period, minimum $5,000, usable for home improvements and renovations including ADUs.
Visit Lender ↗Regional bank with a The Dalles branch at 1100 W. Sixth St; offers One-Time Close construction-to-permanent, Construction-Only, and Renovation loans, plus a HELOC currently at 5.24% intro APR for 6 months.
Visit Lender ↗Has a The Dalles branch at 306 Court St., Suite B; offers new construction loans, renovation loans, HELOC, and cash-out refinance — all usable for ADU construction.
Visit Lender ↗Pacific Northwest CDFI offering dedicated ADU Loans up to $150,000 for design, permitting, and construction; fixed rates with income-qualified reductions; serves all of Oregon including rural areas like The Dalles.
Visit Lender ↗Large Oregon/Washington credit union offering the EquityFlex HELOC and a Fixed Portion option usable for home improvements, renovations, and ADU construction; broadly accessible across Oregon.
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 The Dalles
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.
Free — No Obligation
What Will The Dalles Let You Add?
Setbacks, lot coverage, and height limits decide your addition before a single line is drawn. Send us the address and we’ll tell you what’s actually approvable — free, before you commit to a design.
- ✓Maximum footprint your lot and setbacks allow
- ✓Lot-coverage and height limits in The Dalles
- ✓Whether your addition triggers structural or energy upgrades
- ✓Realistic plan-check timeline for your project
- ✓A straight answer within 48 hours
Review My Project — 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.
Drawing Package Details
What's Included in Your The Dalles Home Addition Package
What You Get
What's in Your The Dalles Home Addition Package
One-time fee, no retainer, no hourly billing — your exact scope and price confirmed on a free call.
- ✓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 The Dalles'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 Codes Services. We support plan check corrections at no extra charge.
Common Questions
The Dalles Home Addition FAQs
Do I need a permit for a home addition in The Dalles? +
Yes — any structural addition to your home in The Dalles 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 The Dalles's submittal requirements.
How much does a home addition cost in The Dalles? +
Home additions in The Dalles typically cost between $150–$400 per square foot depending on the scope, finishes, and structural complexity. A 600 sq ft addition ranges from $90,000 to $240,000. Second-story additions cost more than ground-floor extensions due to structural requirements. Contact us to discuss drawing package options for your project.
What drawings are required to permit a home addition in The Dalles? +
The Dalles'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 The Dalles? +
Plan check in The Dalles typically takes 8 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 The Dalles? +
The Dalles 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 The Dalles? +
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 The Dalles? +
Our permit-ready home addition drawing packages for The Dalles include everything your building department requires — floor plans, elevations, structural, and energy compliance. Every package is engineered for OR code compliance and formatted for The Dalles's building department. 14-day money-back guarantee.
Will a home addition increase my home's value in The Dalles? +
In The Dalles, where median home values are approximately $380,000, 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 The Dalles? +
Second-story additions are permitted in most The Dalles 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.
Also Available in The Dalles
Adding an ADU instead? See our ADU design service.
Next Steps
Ready to Move Forward With Your The Dalles 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 Codes 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
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 Codes Services. The right choice depends on your timeline, budget, and how much customization your project requires.