Do You Need a Site Plan in Oregon?
Yes. Under the Oregon Residential Specialty Code, virtually every residential building permit that involves an exterior footprint change—including new single-family homes, duplexes, accessory dwelling units (ADUs), structural additions, detached garages, storage sheds over 200 square feet, and elevated decks—mandates a scaled site plan.
> Notice: This site plan maker online webtool produces preliminary, conceptual site plans for permit applications where local ordinances allow homeowner or contractor-prepared drawings. It does not replace a licensed boundary survey or provide a professional engineering stamp. Always verify local submission standards with your municipal building department.
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What Makes Oregon Permitting Different
Understanding these four regulatory factors will keep your Oregon building application moving through plan check:
1. Broad Homeowner Drafting Rights
Oregon building departments are remarkably transparent about who can prepare residential drawings:
- Portland Permitting & Development (PP&D): Confirms that "Anyone can draw residential plans. The plans must include straight lines and precise measurements. Plans must be drawn to scale."
- Oregon City Building Division: Explicitly notes: "You may draw your own or have a designer, architect, or other professional prepare one for you. Whether you prepare it yourself or have someone else do it, you are responsible for its accuracy and completeness."
2. Landmark Middle Housing Laws (House Bill 2001)
Oregon was the first state in the nation to pass comprehensive middle housing legislation. Under HB 2001, all cities with a population over 25,000 (and metropolitan Portland jurisdictions) must allow duplexes, triplexes, fourplexes, and cottage clusters on any lot zoned for single-family residences. Site plans for middle housing must document revised Floor Area Ratio (FAR), building coverage percentages, and pedestrian connections.
3. Strict Tree Canopy Preservation (e.g., Portland Title 11)
Oregon cities enforce aggressive urban forestry ordinances. In Portland, Title 11 (Trees) mandates that any exterior development permit must include a certified Tree Plan identifying all trees on the property measuring 12 inches or greater in diameter at breast height (DBH). The site plan must show tree trunk locations, species, accurate drip line radii, and designated Tree Protection Zones (TPZ).
4. The 200 Square Foot Shed Exemption
Under the statewide Oregon building code, a structural building permit is not required for one-story detached accessory structures (like storage sheds) with a floor area of 200 square feet or less and an overall height under 10 feet. However, the structure must contain no electrical or plumbing fixtures, and zoning setback compliance remains mandatory.
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What Oregon Building Departments Require on a Site Plan
Whether you are applying in Multnomah, Washington, Clackamas, Lane, or Deschutes counties, municipal plan examiners assess drawings against this standard checklist:
| Status | Requirement |
|---|---|
| ☐ | Property Boundaries with Exact Dimensions, Lot Area, & Impervious Area |
| ☐ | County Assessor Tax Lot Number / Property Identification Number (PIN) |
| ☐ | Complete Property Address & Current Owner Contact Information |
| ☐ | Footprint of Existing Structures (House, Garage, Porches, Decks) |
| ☐ | Proposed Construction Clearly Labeled (Dimensions, Square Footage, Height) |
| ☐ | Required Setbacks: Front, Rear, Interior Side, & Street Side Lines |
| ☐ | Location of Recorded Easements (Utility, Drainage, Public Access) |
| ☐ | Public Streets, Centerline Dimensions, Curb Cuts, & Driveway Approaches |
| ☐ | Utility Connections: Sanitary Sewer, Water Service, & Stormwater Systems |
| ☐ | Protected Trees (>12" DBH) with Trunk Locations & Drip Line Radii |
| ☐ | Contour Lines at 2-foot intervals (required if elevation change > 4 ft) |
| ☐ | Riparian & Wetland Buffer Zones (Ordinary High Water Mark if near water) |
| ☐ | Minimum Scale (1"=10' or 1"=20' for site plans) & True North Arrow |
Essential Drawing & Formatting Rules
- Portland Drawing Protocol: Scanned or uploaded plan sheets must not contain color; drawings must use solid, permanent black ink. All dimension callouts and notes must maintain a minimum 12-point font size.
- Minimum Site Scale: Oregon building departments mandate a minimum site plan scale of 1 inch = 10 feet (or 1 inch = 20 feet for larger residential parcels).
- Online vs. In-Person: Electronic submittals require a single vector PDF file. Hard-copy counter submittals in Portland require four complete sets of plans.
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Key Oregon Municipalities & County Regulations
1. Multnomah County / City of Portland
- Authority: Portland Permitting & Development (PP&D) via DevHub.
- Stormwater Review: Any project adding 500 square feet or more of impervious surface triggers a mandatory stormwater management review and report.
- Reference Guide: Explore our comprehensive Multnomah County site plan guide for land use approval steps, Title 33 setbacks, and tree protection rules.
2. Lane County (Eugene / Springfield)
- Authority: Lane County Land Management Division Building Program.
- Hand-Drawn Acceptance: Explicitly accepts clear, scaled hand-drawn site plans via the Citizen Self Service (CSS) portal.
- Riparian Setbacks: Strictly enforces the Riparian and Wetland Setback Ordinance along the Willamette and McKenzie rivers.
- Reference Guide: Read our dedicated Lane County site plan guide for riparian buffer tables and urban growth boundary setbacks.
3. Deschutes County (Bend / Redmond)
- Topography Focus: Requires property corner spot elevations and 2-foot contour intervals for lots featuring more than a 4-foot grade differential. All site plans must be uploaded as standalone single-page PDFs.
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Oregon Owner-Builder Rights and Trade Limitations
Under Oregon law, property owners enjoy extensive owner-builder privileges:
- Permit Authority: Property owners can pull residential building permits to construct, alter, or repair their own primary residence.
- Drafting Freedom: Homeowners can prepare and submit their own site plans, foundation diagrams, and structural framing plans.
- Trade Licensing Requirements: While homeowners who occupy the residence can perform their own general carpentry, certain plumbing and electrical trade work in specific jurisdictions requires state-licensed specialty contractors or dedicated owner-builder trade examinations.
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Project-by-Project Guide for Oregon Builders
Match your specific outdoor improvement with our dedicated project blueprints:
- Fence Permit Site Plan: Residential fences up to 7 feet in rear/side yards and 3.5 feet in front yards are generally exempt from building permits; verify property lines to prevent neighbor disputes.
- Deck Permit Site Plan: Decks attached to a home or exceeding 30 inches above surrounding grade require building permits and scaled post-footing layout sheets.
- Shed Permit Site Plan: One-story detached accessory sheds under 200 sq ft and under 10 feet in height skip structural permits, but zoning setbacks still apply.
- Patio Site Plan: Track hardscape square footage to ensure you remain below the 500 sq ft impervious stormwater threshold.
- Driveway Permit Site Plan: Diagram curb cut transitions, vision clearance triangles, and street approach slopes.
- Swimming Pool Permit Site Plan: Show compliant 4-foot safety barrier enclosures, self-latching gates, and pump electrical isolation setbacks.
- Garage Permit Site Plan: Layout detached garages and workshops conforming to accessory height and lot coverage standards.
- Home Addition Site Plan: Show expanded home footprints, foundation tie-ins, and revised impervious coverage calculations.
- ADU Site Plan: Position detached accessory dwelling units or backyard cottages under Oregon’s progressive statewide ADU guidelines.
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Comparing Your Site Plan Preparation Paths in Oregon
| Preparation Method | Cost Range | Turnaround | Boundary Stamp Included? | Best Project Match |
|---|---|---|---|---|
| Our Site Plan Creator | Free First Draft / Self-Serve | Minutes | ❌ No | Sheds, decks, fences, patios, ADU layouts, conceptual additions |
| Hand-Drawn Paper Sketch | Free | Several Hours | ❌ No | Simple rural projects and Lane County CSS submissions |
| Local Draftsman | $300 – $750 | 1 – 2 Weeks | ❌ No | Complex middle-housing additions with multi-level floor plans |
| SitePlans.us Custom Drafting | $129 – $199 | 1 – 3 Business Days | ❌ No | Fast turnaround for addressing Portland DevHub correction notices |
| Oregon-Licensed Land Surveyor | $750 – $2,200+ | 3 – 5 Weeks | ✅ Certified Seal | Disputed boundaries, formal lot partitions, complex hillside sites |
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How to Build Your Plan Using Our Site Plan Maker
With this site plan maker online webtool, you can create a city-ready PDF in five straightforward steps:
- Enter Your Oregon Property Address: Our site plan creator imports available digital parcel boundaries and county GIS records.
Read full Guide how to How to Enter Property Address
- Review Boundaries & Tree Canopy: Check property line dimensions and note the locations of mature trees.
Read full tutorial How to Check Selected Parcel
- Drop Your Proposed Structure: Position your deck, shed, addition, or ADU using true-to-scale measurements.
Support desk Tutorial on How to Add strucuture
- Dimension Zoning Setbacks: Use how to adjust labels to ensure setback lines, text, and structure callouts are crisp and readable.
- Format Title Block & Export: Utilize how to edit title sheets and how to fix property line labels to download a clean, black-line PDF ready for upload to the Oregon ePermitting portal.
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Built for Homeowners, General Contractors, and Commercial Pros
Our platform adapts to every construction workflow across Oregon:
- Site Plans for Homeowners: Built for property owners doing this for the first time who want a clean, professional drawing without CAD learning curves.
- Site Plans for General Contractors: Keep multiple job permits moving forward and execute immediate plan adjustments from the field.
- Site Plans for Volume Home Builders : Standardize layout sheets across suburban developments and infill lots.
- Site Plans for Commercial Real Estate: Produce conceptual plot plans, parking reconfigurations, and tenant improvement exhibits.
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Pricing for Our Site Plan Creator Webtool
Pick the tier that matches your project scope:
| Plan Tier | Price | Ideal For | Features Included |
|---|---|---|---|
| Starter Single Plan | $49 (One-time) | Homeowners doing a single project | High-resolution PDF export, full dimensional editing, setback callouts |
| Professional Pack | $79 / month | Active remodelers & fence/deck builders | 5 downloadable plans per month, title sheet customization, priority support |
| Unlimited Contractor | $299 / month | High-volume GCs & design-build firms | Unlimited plan exports, multi-user access, custom company branding |
Need customized API integrations, multi-office accounts, or high-volume GIS data licensing?
For Enterprise deals contact sales@siteplans.ai
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Common Permitting Pitfalls in Oregon
- Omitting Protected Trees on Portland Submittals: Failing to map trees with trunk diameters of 12 inches or greater under Title 11 will halt plan review immediately.
- Triggering the 500 Sq Ft Stormwater Threshold: Adding hardscape patio surfaces without calculating total new impervious area can trigger an unexpected engineering review requirement.
- Using Color on Submitted Drawings: Portland Permitting & Development strictly requires plans drawn in permanent black ink; colored lines or fills are rejected.
- Ignoring Riparian and Creek Buffers: In Lane and Clackamas counties, building within 50 to 100 feet of a stream or seasonal watercourse violates local riparian ordinances.
- Exceeding the 10-Foot Height Limit on Exempt Sheds: Constructing a 190 sq ft shed that is 12 feet tall invalidates the building permit exemption.
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Oregon Local Permitting Resources
- Oregon Building Codes Division (BCD): oregon.gov/bcd — Oregon Residential Specialty Code.
- Oregon ePermitting Portal: buildingpermits.oregon.gov — Statewide digital permit access.
- Portland Permitting & Development (PP&D): portland.gov/ppd — Portland building codes, DevHub, and Title 11.
- PortlandMaps: portlandmaps.com — Property research, zoning, and aerial records.
- Professional Land Surveyors of Oregon (PLSO): plso.org — Directory of licensed surveyors.
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Frequently Asked Questions
Can I draw my own site plan for a building permit in Oregon?
Yes. Oregon building departments (including Portland, Eugene, and Oregon City) explicitly allow property owners to prepare their own residential site plans, provided drawings are scaled, accurate, legible, and drawn in permanent black ink.
What is Portland’s Title 11 tree rule?
Portland’s Title 11 Tree Code requires that exterior residential development projects document all trees on the property with a diameter of 12 inches or greater at breast height (DBH). The site plan must show tree trunk locations, species, drip lines, and tree protection fencing.
Do I need a permit for a shed in Oregon?
Under the Oregon Residential Specialty Code, a detached one-story storage shed with a floor area of 200 square feet or less and an overall height under 10 feet does not require a structural building permit. However, the shed must have no utilities, and zoning setback regulations still apply.
What is Oregon’s House Bill 2001?
House Bill 2001 is a statewide law that eliminated single-family-only zoning in major Oregon cities, permitting duplexes, triplexes, and fourplexes on standard residential lots to promote middle housing.
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Ready to Generate Your Oregon Site Plan?
Check your zoning setback requirements, input your property address into our site plan creator webtool, drop your proposed structures, and download your dimensioned PDF in minutes.
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