Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Yes. Camas requires a building permit for any deck attached to your house, regardless of size. The city enforces this consistently—there are no exemptions for small attached decks, unlike some Washington jurisdictions that waive permits for ground-level structures under 200 square feet.
Camas Building Department treats attached decks as structural additions to the primary dwelling and requires a permit on all of them, period. This is stricter than neighboring cities like Washougal or Troutdale, which may exempt ground-level freestanding decks under 200 sq ft and 30 inches. Camas also enforces rigorous ledger-flashing compliance (IRC R507.9)—inspectors will reject any plan that doesn't show correct flashing detail, which trips up many homeowners who assume the contractor 'knows what to do.' The city's frost-line requirement is 12 inches in the western Camas area (Puget Sound lowlands) but jumps to 30 inches east toward the Columbia River Gorge, so your lot location matters enormously. Plan for $200–$400 in permit fees (tiered by deck size and complexity), plus $75–$150 for plan-review expediting if you're on a tight timeline. The city processes most deck permits in 2–4 weeks, but complex designs with electrical or high heights can stretch to 6 weeks.

What happens if you skip the permit (and you needed one)

Camas attached deck permits—the key details

Camas Building Department requires a permit for any deck attached to the primary structure. The rule is straightforward: if the deck is connected to the house via a ledger board or structural connection, it triggers permit review. IRC R507 (Decks) governs the design, and Camas enforces the full standard without exemptions. Ground-level freestanding decks under 200 square feet and 30 inches off grade are exempt under IRC R105.2, but the moment you attach it to the house, the exemption vanishes. This differs from some Clark County jurisdictions, which may grant relief for small attached decks if they're under 200 sq ft and meet other conditions. Camas does not. The key implication: you cannot avoid a permit by building a small attached deck. Many homeowners assume a 10x10 attached deck is 'too small to bother,' but Camas will cite you.

Ledger-board flashing is the single most common point of rejection in Camas deck permit reviews. IRC R507.9 requires a continuous flashing membrane between the deck ledger and the house rim board, installed above the deck surface and extending behind the house siding. Many contractors skip this, assume it's 'obvious,' or install it incorrectly (backwards, under the rim board instead of over it). Camas inspectors will reject a plan that doesn't show flashing detail, and they will re-inspect the framing before approving it. The detail must show a galvanized steel or stainless Z-flashing that extends at least 4 inches up the house rim and 2 inches onto the deck board, with a drip edge. This is not optional, and it's the #1 reason deck permits get kicked back for revision. Budget an extra week if your plan doesn't show flashing upfront.

Frost-line footing depth is critical and varies sharply across Camas. The western part of the city (Puget Sound lowland, near downtown) requires 12-inch footings due to milder maritime climate. The eastern portions (toward the Columbia River Gorge) require 30-inch footings because winter freeze cycles penetrate deeper in the transitional zone. Your survey or lot description will usually indicate which frost line applies; if unclear, contact the Building Department before you dig. Many homeowners discover this after pouring footings at the wrong depth and face a requirement to dig them out and reset them—costly and time-consuming. Camas soil is glacial till and volcanic in much of the city, which has good bearing capacity but can be rocky; augering to 30 inches east of town often requires professional drilling, not just a shovel and posthole digger. Budget for a soil engineer's inspection ($200–$400) if your lot is borderline or if you encounter rock.

Guard-rail and stair requirements follow IBC 1015 and IRC R311. Any deck 30 inches or higher off grade requires a guardrail at least 36 inches tall (measured from the deck surface to the top of the rail). Camas enforces the 36-inch rule strictly; some jurisdictions allow 42 inches, but Camas sticks to code minimum. Stairs must have treads between 10 and 11 inches deep and risers between 7 and 8 inches tall; landings must be 36 inches deep. Handrails are required on one side if stairs are less than 44 inches wide, both sides if wider. Baluster spacing (vertical pickets) must not allow a 4-inch sphere to pass through. These details trip up DIY designers; if you're planning your deck in CAD, double-check each dimension against the code or hire a designer to verify. The city's plan-review checklist (available on the Camas permit portal) lists all the items inspectors will verify.

Electrical and plumbing add complexity and cost. If you're adding deck lighting, outlets, or an in-ground spa, you'll need a separate electrical permit (usually $50–$150 depending on circuit count) and a licensed electrician's sign-off. Plumbing connections (hot tub, deck shower, water line extension) require a plumbing permit ($75–$200) and inspection. Camas will not issue a combined building permit that covers these trades; you'll file separate permits and coordinate three separate inspections (building structural, electrical, plumbing). Budget an extra 2–3 weeks if your deck includes utilities. Many homeowners underestimate this timeline and end up waiting longer than they expected. If you're just doing a plain wood deck with no utilities, stick to the standard building-only permit and timeline.

Three Camas deck (attached to house) scenarios

Scenario A
12x14 attached deck, 18 inches off grade, rear yard, western Camas (12-inch frost line), no utilities
This is the most common Camas deck scenario: a modest pressure-treated deck on the back of a 1970s-era rambler in the lowland area near downtown. The deck is attached to the house via a ledger board, 18 inches off grade (well above the 30-inch guardrail threshold, so no rail required). Western Camas frost line is 12 inches, so your footings need to go 12 inches deep—not difficult, but non-negotiable. The plan must show ledger flashing (Z-flashing, galvanized steel, extending 4 inches up the house rim and 2 inches onto the deck board), post-to-beam connections (standard Simpson Strong-Tie bolts or equivalent), and footing detail (12-inch depth, 4-inch gravel base, concrete to grade). This is a straightforward plan-review process. You'll need to submit the permit application (available online at the Camas portal), pay $250–$300 in fees (typically 1.5% of project valuation, which for materials and labor would be $15,000–$20,000), and expect 2–3 weeks for review. The city will schedule footing inspection before you pour, framing inspection after ledger and joists are installed, and final inspection when decking is down and stairs (if present) are complete. Total timeline: 4–6 weeks from permit issuance to final approval. Common pitfall: homeowners often underestimate ledger flashing and show a simple detail that doesn't meet code; plan on one round of revision if your designer isn't familiar with Camas standards.
Permit required | 12-inch frost footings (western Camas) | Ledger flashing detail required | 18 inches off grade (no guardrail) | $250–$300 permit fee | Standard plan review 2–3 weeks | 3 inspections (footing, framing, final) | Total project cost $15,000–$20,000
Scenario B
20x16 elevated deck with stairs, 42 inches off grade, eastern Camas (30-inch frost line), pressure-treated lumber, 4 posts
This scenario shifts to the higher-elevation, colder eastern part of Camas (toward the Columbia River Gorge area). The deck is significantly taller (42 inches off grade), so guardrails are mandatory (36 inches minimum, measured from deck surface). The frost line here is 30 inches, which is a major change from the western 12-inch requirement. Your builder must dig footings 30 inches deep, which in glacial till can mean augering through rocky soil—this often requires a professional drilling crew ($400–$800). The deck is larger (20x16 = 320 sq ft), so plan and structural review are more rigorous. The plan must show guardrail detail (36-inch height, 4-inch baluster spacing), stair dimension detail (treads, risers, landing size, handrail location), ledger flashing, and footing detail with 30-inch depth specified. Permit fees typically run $350–$450 for this scope (larger footprint, more complex structural review). Plan review extends to 3–4 weeks because the city's structural reviewer will flag any undersized beams or posts if the design is marginal. Three inspections are required: footing (pre-pour, to verify 30-inch depth and compaction), framing (to verify ledger flashing, post-to-beam connections, and stair stringers), and final. Timeline: 5–7 weeks from permit to final approval, including the drilling contractor's schedule. A critical local factor here is soil conditions; if you hit bedrock before 30 inches, you'll need a soils engineer to sign off on reduced depth, which adds cost and delay. Many eastern Camas homeowners discover this mid-project and face unexpected expenses.
Permit required | 30-inch frost footings (eastern Camas) | Guardrail required (36 inches) | Stair detail required | Ledger flashing detail required | $350–$450 permit fee | Professional drilling likely needed ($400–$800) | 3–4 week plan review | Total project cost $20,000–$30,000
Scenario C
16x12 attached deck with 240V outlet circuit and low-voltage deck lighting, 24 inches off grade, western Camas, composite decking
This scenario showcases a 'luxury' deck with electrical utilities, which triggers multiple permits and complicates the timeline significantly. The deck itself is 16x12 = 192 sq ft (no guardrail required, as it's under 30 inches), and it's in western Camas (12-inch frost line). However, the addition of a 240V outlet (for a future hot tub or outdoor fridge) and LED low-voltage landscape lighting requires a separate electrical permit. Camas will not issue a single 'combined' permit; instead, you file a building permit for the deck structure ($250–$300) and an electrical permit for the circuits ($75–$150). The building plan must show footing detail (12-inch depth), ledger flashing, and a note indicating where the electrical contractor will run conduit through the framing (typically along the rim joist or under the deck). The electrical plan must show the 240V circuit originating from a dedicated breaker in the house panel, running through conduit (typically 3/4-inch PVC or schedule-40 conduit), and terminating in a GFCI-protected outlet box on the deck. Low-voltage lighting is often added after the structural inspection and doesn't always require a separate permit, but check with the city—Camas treats low-voltage separately from line-voltage. The timeline is the critical issue here: the building permit takes 2–3 weeks for review, and the electrical permit takes 1–2 weeks, but they overlap. However, the electrical inspector must inspect after the building framing inspection is complete (to verify that conduit routing doesn't compromise structural integrity). Total timeline: 4–6 weeks. Composite decking (non-wood) decks don't change permit requirements but may affect inspector comments if the composite manufacturer's specs differ from standard lumber (e.g., fastener spacing, thermal expansion). Many homeowners underestimate the electrical permit complexity and timeline; budget an extra week and hire a licensed electrician to coordinate with the city's electrical inspector.
Building permit required ($250–$300) | Electrical permit required ($75–$150) | 12-inch frost footings (western Camas) | Ledger flashing detail required | Separate electrical plan review needed | Licensed electrician required | 4–6 week total timeline | 4 inspections (footing, building framing, electrical rough-in, final) | Total project cost $18,000–$26,000

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Frost depth and soil conditions in Camas: why they matter so much

Camas sits in a transitional climate zone that straddles two different frost-line requirements. The western portions (downtown, along the Camas-Washougal Road, western neighborhoods) are in the Puget Sound maritime zone with 12-inch frost lines due to mild winter temperatures and maritime influence. The eastern portions (toward the Columbia River Gorge, east of Highway 14) experience colder winters and deeper frost penetration, requiring 30-inch footings. This 18-inch jump is not trivial; it means the difference between a 2-hour footing job and a full day with a power auger or professional drilling crew. Many homeowners purchase property without realizing which frost zone they're in, pour footings at the wrong depth, and face either a costly re-do or a failed inspection.

Soil composition in Camas is glacial till and volcanic, which affects bearing capacity and digging difficulty. Glacial till is a dense mix of clay, gravel, and boulders deposited by ancient glaciers; it has excellent bearing capacity (4,000+ psf), so footings don't need to be oversized. However, it's rocky and often difficult to auger. The volcanic soils in parts of eastern Camas (near the Gorge) can be equally rocky and may require blasting or professional drilling to reach frost depth. Budget for soil exploration and possible engineer consultation if you're in eastern Camas or if your initial test hole hits rock at shallower depths. A soils engineer's inspection costs $200–$400 but can save you thousands in footing rework.

Verify your frost line and soil type before you design your deck. Contact the Camas Building Department with your property address and ask which frost-line zone you're in; they'll tell you immediately. If you're unsure, ask for a pre-permit consultation (often free or a small fee). Some jurisdictions require you to file a soils report if you're in a high-risk area; Camas does not always demand this, but having one on file protects you if a footing inspection reveals unexpected conditions. Never assume your neighbor's deck footing depth applies to your lot; frost line is location-specific.

Ledger-flashing compliance and why Camas inspectors are strict about it

Water intrusion at the ledger board is the #1 cause of deck-related house damage in the Pacific Northwest. Rain and snowmelt penetrate gaps between the ledger and the rim board, rotting the rim joist, floor joists, and eventually the house framing. Camas inspectors have seen this damage repeatedly and enforce IRC R507.9 (ledger-board flashing) without exception. The rule is clear: a continuous flashing membrane must separate the ledger from the rim board, installed above the deck and extending behind the house siding. Galvanized steel or stainless Z-flashing is standard; some jurisdictions accept rubberized flashing, but Camas sticks to metal. The flashing must extend at least 4 inches up the rim board and 2 inches onto the deck ledger, with a drip edge on the lower portion.

Many homeowners and even some contractors misinstall ledger flashing or omit it entirely, assuming the caulk will seal it. Wrong. Caulk deteriorates (especially in the Pacific Northwest's freeze-thaw cycles), and without flashing, water finds its way behind the siding. Camas will not approve a plan that doesn't show flashing, and if the framing inspector spots improper or missing flashing during the inspection, work stops until it's corrected. This often adds 1–2 weeks to the timeline. To avoid rejection, have your designer or contractor show flashing detail on the plan: a section drawing of the ledger connection showing the Z-flashing location, fastening pattern, and siding removal/reinstatement. If you're designing the deck yourself, download the Camas Building Department's deck plan checklist (available on their portal) and verify your flashing detail matches their examples. When in doubt, hire a designer or engineer to review your plan before submission.

Material choice matters, too. In Camas's wet climate, galvanized steel flashing should be galvanized per ASTM A123 (not painted steel), or stainless steel (preferred in coastal or high-corrosion areas). The flashing must be fastened with stainless or galvanized fasteners—aluminum rivets or fasteners will corrode. Sealed penetrations for through-bolts or lag bolts must use stainless washers and grommet seals. These details seem minor but they accumulate into durability. A flashing installed correctly will outlast the deck itself; poor flashing fails within 5–10 years in the Pacific Northwest climate.

City of Camas Building Department
316 3rd Avenue, Camas, WA 98607
Phone: (360) 817-7640 (verify current number with city hall) | https://www.camas.wa.us/government/departments (check for permit portal link or contact department for online submission)
Monday–Friday, 8:00 AM–5:00 PM (closed holidays; call to confirm current hours)

Common questions

Do I need a permit for a small 8x10 attached deck in Camas?

Yes. Camas requires a permit for any attached deck, regardless of size. There is no exemption for small attached decks. If the deck is connected to the house, it needs a permit. The only exemption is for ground-level freestanding decks under 200 sq ft and 30 inches off grade, but the moment you attach it to the house via a ledger board, the exemption vanishes.

What's the difference between the 12-inch and 30-inch frost lines in Camas?

Western Camas (downtown, Puget Sound lowland) has a 12-inch frost line due to milder maritime climate. Eastern Camas (toward the Columbia River Gorge) has a 30-inch frost line due to colder winters. Your address determines which applies; contact the Building Department with your property address to confirm. This affects footing depth and digging cost significantly.

How much does a deck permit cost in Camas?

Permit fees typically range from $200 to $450 depending on deck size and complexity. Fees are usually calculated as a percentage of project valuation (around 1.5–2% for a 15,000–25,000 dollar project). A simple 12x14 deck runs $250–$300; a larger 20x16 elevated deck with stairs runs $350–$450. Additional fees apply if you need electrical or plumbing permits.

How long does the permit review process take in Camas?

Standard deck permits typically take 2–4 weeks for plan review. Complex designs (elevated decks over 42 inches, with stairs and railings, or with utilities) may take 3–5 weeks. If your plan is missing required details (especially ledger flashing), expect an additional 1–2 weeks for revision and re-review. Plan accordingly and submit early if you're on a deadline.

Do I need a licensed contractor to build my deck in Camas, or can I do it as owner-builder?

Camas allows owner-builders on owner-occupied properties. You do not need to hire a licensed contractor, but you must pull the permit in your name and coordinate inspections yourself. You're responsible for code compliance; inspectors will still require proper footing depth, flashing, guardrails, and stair dimensions. Many owner-builders find it easier and safer to hire a contractor anyway, both for expertise and for insurance liability.

What's the most common reason deck permits get rejected in Camas?

Missing or incorrect ledger-flashing detail. Inspectors require a plan showing galvanized or stainless Z-flashing extending 4 inches up the house rim and 2 inches onto the deck ledger, with a drip edge and proper fastening. Many DIY plans skip this or show it incorrectly, leading to rejection and revision. To avoid rejection, include a detailed section drawing of the ledger connection on your plan.

If I'm building an elevated deck on the east side of Camas and hit rock before 30 inches, what do I do?

Contact the Camas Building Department and request a soils engineer evaluation. If bedrock is shallower than 30 inches, a soils engineer can document bearing capacity and recommend an alternative footing design (e.g., a pier or helical anchor). This requires a professional engineer's stamp and typically costs $300–$600. Do not pour footings at reduced depth without written approval from the city or an engineer; you'll fail inspection and face costly rework.

Can I add electrical outlets or lighting to my deck without pulling a separate electrical permit?

No. Camas requires a separate electrical permit for any line-voltage circuits (120V or 240V outlets, hardwired lights). Low-voltage landscape lighting (12V or less) may not require a permit, but check with the Building Department. You'll need to coordinate three separate inspections: building framing, electrical rough-in, and final. Budget an extra 2–3 weeks if utilities are involved.

What if I build a deck without a permit and then want to sell my house?

You must disclose the unpermitted work on the Residential Real Estate Disclosure Statement. Buyers often demand removal of the deck or a significant credit (often 30–50% of the deck's value, or $5,000–$15,000 for a typical deck). Many buyers will not close until the deck is permitted and inspected retroactively, which is complex and costly. It's far cheaper to get the permit upfront before you build.

Are there any HOA or historic-district rules for decks in Camas?

Some Camas neighborhoods have HOA restrictions on deck size, materials, or setback; check your covenants. Historic-district overlays may also apply in downtown Camas or other designated areas, which can restrict visible deck materials (e.g., composite vs. wood) or require architectural review. The city's planning staff can tell you if your property is in a historic district or overlay zone. File any HOA or historic-district approval before submitting your building permit.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current deck (attached to house) permit requirements with the City of Camas Building Department before starting your project.