What happens if you skip the permit (and you needed one)
- Stop-work orders in Murray carry $500–$2,000 fines plus mandatory permit re-pull and double inspection fees (total $400–$800 in additional permit costs).
- Lender and title-insurance carriers flag unpermitted decks in refinance or sale — the Residential Property Disclosure Statement (RPDS) requires disclosure of structural work, and buyers can demand removal or escrow hold (cost: $3,000–$15,000 to tear down and remediate).
- Your homeowner's insurance may deny claims for injuries on an unpermitted deck, leaving you personally liable if someone is injured ($50,000–$500,000+ in litigation risk).
- Seismic failure risk: a ledger connection without lateral-restraint hardware can pull away from the house rim-joist during an earthquake, causing collapse — not a financial penalty but a safety liability that inspection prevents.
Murray attached decks — the key details
Any attached deck in Murray, Utah requires a permit — there are no exemptions for small attached decks under Utah Code or Murray municipal ordinance. The IRC R105.2 exemption for ground-level structures under 200 square feet does not apply to attached decks because the ledger connection creates structural dependency on the house. Even a small 8-foot by 10-foot deck attached to your rim-joist must be permitted. The reason: the ledger flashing and bolting detail is a common failure point in earthquakes and heavy snow-load seasons. Murray's seismic zone 2B designation (per ASCE 7-22, adopted by Utah) means your ledger-to-house connection must be engineered to resist lateral forces — a requirement that gets triggered during plan review, not at inspection. The city's plan review process centers on this ledger detail and footing depth calculations.
Frost depth is the second controlling requirement in Murray. Utah Code and the city's amendments to IRC R403.1 require all footings for attached decks to be placed below the local frost line. In Murray, that depth ranges from 30 inches at lower elevations (near 4,200 feet) to 48 inches in the Wasatch foothills (above 5,000 feet). Your surveyor or the site plan must document the exact elevation and frost depth for your lot; the plan reviewer will compare your footing detail to that frost line and reject anything above it. This is non-negotiable and drives the cost of footing engineering. If your deck footings sit above the frost line, soil heave from freeze-thaw cycles will lift the deck and separate the ledger from the house — a safety and structural failure that the permit process explicitly prevents. Many homeowners in flat neighborhoods think they can use 18-inch footings (standard in warmer climates); in Murray, that's 12-18 inches too shallow.
Ledger flashing and connection detail per IRC R507.9 is the third major requirement and the most common rejection point in plan review. Murray's version of the IRC R507.9 detail requires flashing to be installed over the top of the exterior rim-joist and sealed at top, sides, and bottom with sealant or metal closure strips. The flashing must be continuous and overlap all walls, rim-joist band board, and band-board insulation. Additionally, the ledger must be bolted to the house rim-joist with 1/2-inch bolts spaced 16 inches on center maximum (IRC R507.9.2), and each bolt must be paired with a lateral-restraint device (Simpson LSSU or equivalent) to resist seismic shear. This is where seismic zone 2B bites: many online deck plans don't show the LSSU connector, and the plan reviewer will reject them. The cost of proper ledger hardware and flashing can add $200–$400 to material costs but is mandatory and non-negotiable in Murray.
Expansive soil testing and footing engineering are required if your footings exceed 18 inches depth, which they will in Murray due to frost depth. Lake Bonneville clay soils underlie most of Murray and the surrounding Wasatch Front. Expansive clays shrink and swell with moisture, and if footings are placed directly on untested expansive soil, they can move seasonally (1-2 inches) and destabilize the deck. The city requires either a soil report from a geotechnical engineer or use of a registered design professional (RDP) calculation that accounts for expansive soil. This adds $300–$800 to engineering costs but is often required by the plan reviewer as part of the structural approval. Many DIY permit applicants skip this step and the permit is delayed or rejected. If you hire a structural engineer, they will include the soil consideration in their report and seal the plans; that's the easiest path.
Timeline and inspection sequence in Murray follow a typical three-inspection process: footing pre-pour (before concrete is placed), framing (after ledger is bolted and deck frame is assembled), and final (after railings, stairs, and flashing are complete). Each inspection typically takes 3-5 business days to schedule, and the entire process from permit-pull to final approval averages 4-6 weeks. Plan review is typically 5-10 business days for standard decks, but seismic or soil-testing details can extend that to 15-20 business days. The city's Building Department uses an online portal for permit status tracking, so you can monitor progress and see reviewer comments in real time. If the reviewer flags missing details (flashing, LSSU connectors, frost-depth documentation), you'll have 10 business days to resubmit corrections before the permit is denied. Working with a plan-preparation service or structural engineer on the front end prevents most rejections and keeps the process on schedule.
Three Murray deck (attached to house) scenarios
Wasatch Front frost depth and footing engineering in Murray
Murray's frost depth varies significantly by elevation due to the Wasatch Front microclimate. The USGS and the Utah Department of Environmental Quality document frost depths ranging from 30 inches in the valley floor (near 4,200 feet elevation) to 42-48 inches in the foothills (4,800-5,500 feet). The city's adoption of the 2018 IRC R403.1.5.1 requires all footings for structures (including decks) to be placed below the documented frost line for the specific location, not a generic city-wide depth. This means your deck footing design depends on your exact elevation and lot location. If your home is near the Vine Street corridor or south of Center Street, assume 30-36 inches. If you're east of Main Street or near the Cottonwood foothills, assume 38-48 inches. The plan reviewer will cross-reference your site plan elevation against USGS quad sheets and reject footings that don't meet the depth requirement.
The reason for the frost-depth requirement is freeze-thaw heave: water in soil expands when it freezes (approximately 9% volume increase), and if a footing sits above the frost line, that heave will lift the deck incrementally each winter. After 5-10 years, a deck with shallow footings can rise 1-2 inches relative to the house ledger, creating a gap and separating the ledger flashing seal. This separation allows water infiltration, which damages the rim-joist and band board, leading to rot and structural failure. The permit process catches this before installation. To determine your frost depth, you can hire a surveyor or use the USGS website to look up your elevation and cross-reference published Wasatch Front frost-depth tables. Most structural engineers will include frost-depth documentation in their sealed plans at no additional cost.
Footing installation in Murray requires either drilled piers below frost depth or trenched footings with concrete poured and cured before the frost season. Most residential decks in Murray use drilled piers (6-inch or 8-inch diameter holes drilled with an auger to frost depth, then filled with concrete and set with a post base or footing pad). The cost is $100–$150 per hole for drilling and concrete (3-4 holes typical for a 12×16 deck). If you choose trenched footings, excavation must reach frost depth and be inspected by the city before concrete is poured. Either way, the pre-pour footing inspection is the first inspection after permit issuance, and the inspector will verify hole depth, width, and concrete specifications against the approved plan.
Seismic zone 2B ledger connections and lateral-restraint hardware in Murray
Murray is in seismic zone 2B per ASCE 7-22, which is the same zone as Salt Lake City and the greater Wasatch Front. This designation means the city experiences moderate seismic risk, primarily from the nearby Wasatch Fault and secondary fault lines. The Wasatch Fault runs north-south through the eastern part of the valley, and a major earthquake (estimated 6.5-7.5 magnitude) occurs roughly every 300-400 years. The last major event was approximately 1,400 years ago. While the probability of a large earthquake in any given year is low, Utah Code and the city's amendments to the 2018 IBC require that decks and other structures include seismic design elements that would allow the structure to survive and remain functional during shaking. For decks, that means the ledger connection must resist lateral (horizontal) forces in addition to vertical (gravity) loads.
The ledger-to-house connection is the critical weak point in a deck's seismic response. Without lateral-restraint hardware, the ledger can pull away from the rim-joist during horizontal shaking, causing the deck to separate and collapse. To address this, IRC R507.9.2 (as adopted by Utah) requires that the ledger be bolted with 1/2-inch bolts spaced 16 inches on center maximum AND that each bolt be paired with a lateral-restraint device (Simpson LSSU seismic lateral strap or equivalent). The LSSU is a metal strap that wraps around the rim-joist and bolts alongside the ledger bolt, creating a mechanical connection that resists both tension and shear. The device adds $15–$25 per bolt to hardware costs but is mandatory in Murray. Most online deck plans from non-Utah sources don't show LSSU connectors; the city's plan reviewer will flag that as a deficiency and require corrections. Working with a local structural engineer ensures the ledger detail includes the correct hardware specification.
The LSSU connector is inspected during the framing inspection. The inspector will verify that each connector is bolted through the rim-joist with a 1/2-inch bolt, washer, and nut (not ring-shank nails), and that the device is tightened snugly. The ledger flashing is also inspected at this stage to ensure it's installed and sealed per IRC R507.9. If either the connectors or flashing are missing or incorrect, the permit will be conditional on rework before final approval. The combined cost of proper ledger bolts and LSSU connectors for a typical deck is $200–$400 in hardware, which is a worthwhile investment in structural safety and permit compliance.
Murray City Hall, 5025 South State Street, Murray, UT 84107
Phone: (801) 270-2700 (main line; ask for Building Department) | https://www.murrayutah.gov/residents/building-permits (or check city website for current portal)
Monday–Friday, 8:00 AM–5:00 PM; closed weekends and holidays
Common questions
Can I build an attached deck without a permit if it's under 200 square feet?
No. The 200-square-foot IRC exemption does not apply to attached decks because the ledger connection creates a structural dependency on the house. Any attached deck requires a permit in Murray, regardless of size. Even a small 8-foot by 10-foot deck (80 square feet) must be permitted. The exemption only applies to freestanding ground-level decks (not attached to the house) that are under both 200 square feet AND 30 inches above grade.
What's the actual cost of a deck permit in Murray?
Deck permits in Murray cost $200–$450 depending on valuation. The fee is typically 1.5-2% of the estimated deck cost. A $15,000 deck generates a $225–$300 permit; a $25,000 deck generates a $375–$500 permit. If you add electrical work, that's an additional $75–$150 for the electrical permit. The permit office can provide a cost estimate if you submit a rough scope (deck size, height, materials).
How deep do footings need to be in Murray?
Footings in Murray must be placed below the local frost line, which ranges 30-48 inches depending on elevation. At lower elevations (near 4,200 feet), frost depth is 30 inches, so footings must go 36 inches minimum. At higher elevations (4,800-5,500 feet), frost depth is 42-48 inches, so footings must go 48-54 inches. The plan reviewer will verify your elevation and compare your footing depth to the documented frost line for your location. Shallow footings will cause frost heave and ledger separation over time.
Do I need to hire a structural engineer for my deck permit in Murray?
Yes, strongly recommended. A structural engineer will seal the plans with proper frost-depth calculations, ledger connection details (including LSSU connectors), footing design, and — if needed — expansive-soil analysis. This typically costs $400–$600 and prevents plan-review rejections and timeline delays. For small simple decks (under 12 feet wide, under 2 feet elevation), some homeowners use online deck plan services, but the plan must still be reviewed by the city, and seismic/frost-depth details are often incomplete. Working with a local engineer is the safest path.
What is an LSSU connector and why is it required in Murray?
An LSSU (Simpson LSSU Seismic Lateral Strap) is a metal strap that wraps around the rim-joist and resists lateral (horizontal) forces during earthquakes. Murray is in seismic zone 2B, so the ledger connection must resist both vertical loads (the deck weight) and horizontal shear. Each ledger bolt must be paired with an LSSU connector bolted through the rim-joist. The device costs $15–$25 and is mandated by IRC R507.9.2 as adopted by Utah. Without it, the ledger can pull away during seismic shaking. The inspector will verify LSSU installation during the framing inspection.
What happens during the deck permit inspections in Murray?
There are typically three inspections: (1) Footing pre-pour: inspector verifies hole depth, width, and frost-line compliance before concrete is poured. (2) Framing: inspector checks ledger bolts and LSSU connectors, deck frame assembly, joist spacing, and ledger flashing installation. (3) Final: inspector verifies guardrail height (36 inches minimum), stair dimensions, deck surface, and ledger flashing seal. Each inspection is scheduled on your request and typically happens within 3-5 business days. You must be present or arrange key access. Plan for 4-6 weeks total from permit-pull to final approval.
Can I pull the permit myself as an owner-builder in Murray?
Yes. Utah law allows owner-builders to pull permits for work on owner-occupied residential property. Murray allows this, but you must be the property owner and the permit must list you as the owner-builder. You'll need to prepare the plans yourself (or hire a plan-prep service) and submit them to the city. However, you still need the plans to be correct — if they're missing ledger details, frost-depth calculations, or seismic connectors, the city will reject them. Many owner-builders hire a structural engineer to seal the plans and avoid rejections. As an owner-builder, you can do the work yourself or hire subcontractors; the permit doesn't restrict who does the labor, only who pulls the permit.
Do I need soil testing for my deck in Murray?
Soil testing is required if your footings will be excavated more than 18 inches deep AND the lot has a known history of expansive (clay-rich) soils. Lake Bonneville clay underlies much of Murray, especially in the foothills east of Main Street. If your footing depth (typically 36-48 inches for frost compliance) exceeds 18 inches, the city may require a geotechnical report or a professional footing design that accounts for expansive-soil expansion/contraction. This costs $500–$800 but is often required as part of plan review in the eastern portions of Murray. Ask the plan reviewer or hire a geotechnical engineer upfront to avoid delays.
How long does the entire deck project take in Murray — from permit to final inspection?
Plan for 4-7 weeks total. Plan review is 2-3 weeks (longer if soil testing or seismic details need clarification). Footing inspection is 1 week. Framing and final inspections are 2 weeks combined. If rework is needed (e.g., flashing corrections), add another 1-2 weeks. Simple decks on flat ground with good plans can finish in 4-5 weeks; decks with soil testing, high elevation, or electrical work typically take 6-7 weeks. Don't plan to host a deck party until 2 months after pulling the permit.
What's the difference between a deck permit and an electrical permit for a deck with outlets?
A deck permit covers the structural deck (frame, footings, ledger, railings). An electrical permit covers any circuits or wiring that serve the deck. If you add a 20-amp outlet with GFCI protection, that's a separate electrical permit ($75–$150). The electrical plan must show breaker type, wire gauge, conduit protection, and outlet height. Both permits are reviewed and inspected separately, though often on the same timeline. Low-voltage lighting (12V or 24V hardwired to a transformer) typically doesn't require an electrical permit if it's labeled low-voltage. Check with the city electrical inspector if you're unsure.