Everett Concrete Calculator
Everett Concrete Calculator — Yards, Bags & Cost
Calculate cubic yards, bags needed, and Snohomish County–accurate ready-mix costs for any Everett project — driveways, marine clay foundations, wet-season slabs, Puget Sound footings & more.
$168Avg Everett Ready-Mix per Cu Yd
12 inFrost Depth — Everett / Snohomish Co.
3,000Min PSI — Everett Standard Flatwork
WSBCWashington State Building Code
The Everett Concrete Calculator helps homeowners, contractors, and builders in Everett, Washington estimate cubic yards, bag count, and Snohomish County ready-mix costs. Everett is the county seat of Snohomish County, located on Puget Sound 25 miles north of Seattle — a wet Pacific Northwest maritime climate averaging 38 inches of rain per year, with mild winters and warm, dry summers. Ready-mix pricing runs $155–$185/yd in the Puget Sound north metro area. Everett’s primary concrete challenges are its marine clay and soft alluvial soils — glacially deposited Lawton Clay and soft deltaic sediments common across the Snohomish River floodplain that compress under load and expand when saturated — and its long wet season (Oct–May) that saturates subgrades and complicates slab scheduling. Frost depth in Everett is 12 inches per the Washington State Building Code for Snohomish County. The City of Everett Permit Services issues all structural concrete permits under the Washington State Building Code (WSBC 2021). [web:111][web:113][web:118]
🌧️ Everett WA · Snohomish County · 12-in Frost · Marine Clay · WSBC 2021
Everett Concrete Calculator
Cubic yards, bags needed & Snohomish County ready-mix cost — instant results
Driveway: 4 in. min, 3,000 PSI. No air entrainment required — Everett averages fewer than 10 significant freeze-thaw events/yr. Rebar recommended on marine clay. No permit for private flatwork. Avoid saturated Oct–May subgrade. Call 811 before digging.
Patio 3.5–4 in · Driveway 4–5 in · Garage 4–5 in · Footing 12–18 in · Foundation wall 8 in min · Retaining wall 8–12 in
Cubic Yards Required
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📋 Project Summary
💵 Everett / Snohomish Cost
📐 Everett Slab Cross-Section — Snohomish County / WSBC 2021 Standard
BROOM FINISH — EVERETT WA · WSBC 2021 · CURE PROMPTLY IN RAIN SEASON · NO AIR ENTRAINMENT REQ.
Concrete — 4 in. min · 3,000 PSI · W/C ≤ 0.50 · Rebar Recommended on Marine Clay · Vapor Barrier Below
⬛ REBAR #3–#4 / WIRE MESH — REQUIRED FOUNDATIONS · STRONGLY REC. OVER EVERETT MARINE CLAY
🔵 VAPOR BARRIER (6-MIL POLY) — REQUIRED ALL INTERIOR / GARAGE SLABS · PUGET SOUND MOISTURE
🪨 4–6 in. Compacted Crushed Rock Base — Critical Over Soft Lawton Marine Clay / Alluvial Soils
Lawton Marine Clay / Soft Alluvial Subgrade (Compress Under Load · Saturated Oct–May · Compact First)
❄️ FROST LINE — 12 INCHES BELOW GRADE · SNOHOMISH COUNTY WA · WSBC 2021 TABLE R301.2(1)
27Cu ft per cubic yard
4580 lb bags per cu yd
$168Avg Everett ready-mix / yd
Concrete Slab
Rebar Layer
Vapor Barrier
Crushed Rock Base
Marine Clay
12-in Frost Line
Everett Concrete — Key Local Requirements
Everett’s concrete work is defined by two major challenges: Lawton marine clay and soft alluvial soils, and the long Pacific Northwest wet season. Lawton Clay — dense glacially deposited marine sediment — dominates much of Everett’s hillside terrain and compresses significantly under structural load when disturbed or saturated. Soft alluvial and deltaic soils in the Snohomish River floodplain areas present even greater settlement risk. Combined with Everett’s Oct–May rainy season (when subgrades remain saturated for weeks), these conditions make proper subgrade preparation the single most important factor in any Everett concrete project. Ready-mix costs a premium $155–$185/yd reflecting high Puget Sound labor costs, Washington State B&O taxes, and Seattle-metro market pricing. [web:109][web:111][web:113]
⚠️ Lawton Marine Clay — Everett’s #1 Concrete Risk
Lawton Clay and soft alluvial soils common across Everett compress significantly under structural load when disturbed and saturated, causing slab settlement, foundation movement, and cracking. Always over-excavate 4–6 inches and replace with compacted crushed rock (3/4-inch minus) before placing any concrete. A geotechnical report is required by City of Everett Permit Services for most new residential foundations — it specifies required bearing capacity, subgrade prep, and footing depths specific to your lot’s soil conditions. [web:113]
✅ City of Everett Permit Rules — What Needs a Permit
The City of Everett Permit Services does NOT require a permit for concrete flatwork (patios, driveways, walkways on private property). Permits ARE required for all structural concrete — foundations, basement walls, retaining walls, ADUs, garages, and additions. A mandatory footing inspection is required before structural concrete is placed. Retaining walls over 4 ft require a permit and engineer-stamped plans. Contact Everett Permit Services at (425) 257-8810. [web:116]
🚗 Everett Driveway Cost
10×40 ft at 4 in. = ~4.9 yd. At $155–$180/yd → $760–$882 material. 3,000 PSI standard. Rebar recommended on clay sites. No permit for private flatwork. Avoid Oct–May saturated subgrade. Call 811 before digging. [web:109]
🌧️ Wet-Season Pour Precautions
Everett’s Oct–May rainy season saturates Lawton Clay subgrade, making compaction nearly impossible. Cover fresh concrete immediately if rain forecast within 2–3 hours. Never pour on standing water or soft, yielding ground. Schedule pours during dry-weather windows Jun–Sep whenever possible. Have plastic sheeting and windbreaks on-site all year. [web:111]
🏗️ Foundation Requirements
WSBC 2021 requires footings at 12 in. min below grade in Snohomish County. 3,000–3,500 PSI min. #4 rebar. City of Everett mandatory footing inspection before pour. Geotech report required for most new residential foundations. ADU and addition foundations follow WSBC 2021 / Snohomish County structural requirements. [web:115][web:118]
Everett Concrete Volume Formula
📐 Calculation Steps
Volume (cu ft) = Length (ft) × Width (ft) × [Depth (in) ÷ 12]
Volume (cu yd) = Volume (cu ft) ÷ 27
Order Qty = CEIL[ Volume (cu yd) × Waste Factor ]
Example: 20 ft × 10 ft × 4 in = 66.7 cu ft = 2.47 cu yd → Order 2.7 cu yd (+10%)
Everett / Snohomish County Pricing Reference
Everett is served by multiple Puget Sound north metro ready-mix suppliers including Green Dot Concrete (Snohomish County specialist), Cadman, and Cemex. Short-load fees of $150–$250 apply for orders under 7–8 yards. Weekend surcharges of $75–$150/truck. Pump truck rental adds $400–$900/day. [web:109]
| Mix / PSI | Everett / Snohomish Price / Yd | National Avg | Best For | WA Code |
|---|---|---|---|---|
| 2,500 PSI | $155–$168 | $119–$132 | Non-structural walkways, interior slabs | Non-Structural |
| 3,000 PSI ← WA Standard | $160–$174 | $124–$140 | Driveways, patios, garage floors | Compliant |
| 3,500 PSI | $167–$180 | $130–$148 | Foundations, structural slabs, ADUs | Compliant |
| 4,000 PSI | $174–$188 | $136–$155 | Basement walls, heavy structural | Compliant |
| 5,000 PSI | $185–$210 | $147–$172 | Commercial / post-tensioned specialty | Engineer Req. |
| Fiber / Stamped / Colored | $190–$245 | $155–$205 | Decorative driveways, outdoor patios | Compliant |
2,500 PSI — Non-Structural
Everett Price / Yd$155–$168Best ForInterior / walkways only
3,000 PSI — WA Standard
Everett Price / Yd$160–$174Best ForDriveways, patios, garage floors
3,500 PSI — Structural
Everett Price / Yd$167–$180Best ForFoundations, structural slabs, ADUs
4,000 PSI — Heavy Structural
Everett Price / Yd$174–$188Best ForBasement walls, heavy structural
5,000 PSI — Commercial / PT
Everett Price / Yd$185–$210Best ForCommercial / post-tensioned
Fiber / Stamped / Colored
Everett Price / Yd$190–$245Best ForDecorative driveways / patios
Everett Concrete Project Tips
- Get a geotechnical report before any new foundation — Everett’s Lawton Clay and soft alluvial soils vary dramatically lot by lot. A geotech report ($600–$1,500) specifies required bearing capacity, subgrade prep depth, and footing size. Required by City of Everett Permit Services for most new residential foundations. Never skip this step in Snohomish County’s complex soil conditions.
- Install 4–6 inch compacted crushed rock under all slabs — compact to 95% relative compaction with a plate compactor. Everett’s marine clay retains moisture year-round, making an adequate granular base layer critical for preventing slab settlement and heave under any concrete flatwork or structural slab.
- Always install a vapor barrier under interior and garage slabs — Everett’s year-round ground moisture and high rainfall create constant moisture vapor pressure from below. A 6-mil polyethylene vapor barrier (or 10-mil for garages) prevents condensation, mold, and floor covering failures. Required by WSBC 2021 for habitable slab-on-grade construction.
- Schedule pours June through September whenever possible — Everett’s dry season offers dry, firm, compactable subgrade. Oct–May rains saturate Lawton Clay, making compaction extremely difficult. If wet-season pouring is unavoidable, install temporary drainage, wait for 5+ dry days, and verify subgrade firmness before scheduling the truck.
- Protect fresh concrete from Everett’s frequent rain — have plastic sheeting, forming tents, and windbreaks on-site year-round. Rain hitting fresh concrete within the first 4 hours washes away cement paste, weakening the surface. Cover immediately if rain begins during finishing operations.
- Permits not required for flatwork — but mandatory for structures — no City of Everett permit needed for driveways, patios, walkways on private property. Permits required for all foundations, basement walls, retaining walls, garages, ADUs, and additions. Retaining walls over 4 ft need engineer-stamped plans. [web:116]
- Call 811 (Washington 811) before any digging — Washington State law requires calling 811 at least 2 business days before excavation. Washington 811 coordinates free marking of Puget Sound Energy gas/electric, City of Everett water/sewer, and telecom infrastructure. Failure to call is a Washington State law violation.
Frequently Asked Questions — Everett Concrete
How much does concrete cost per yard in Everett, WA?+
Expect $155–$185/yd for standard 3,000 PSI ready-mix in Everett — among the higher rates in Washington State due to Puget Sound labor costs, WA B&O taxes, and Seattle-metro market demand. Short-load fees of $150–$250 apply for orders under 7–8 yards. Weekend surcharges of $75–$150/truck. Pump truck rental adds $400–$900/day. [web:109]
What is the frost depth in Everett, Washington?+
The frost depth in Everett and Snohomish County is 12 inches per Washington State Building Code (WSBC 2021) Table R301.2(1). All structural footings must extend at least 12 inches below finished grade. Everett’s mild maritime climate means soil rarely freezes deeper than a few inches in practice, but the code minimum must still be met and is verified at City of Everett’s mandatory footing inspection. [web:17]
Do I need a permit for concrete in Everett?+
The City of Everett Permit Services does NOT require a permit for flatwork (driveways, patios, walkways on private property). Permits ARE required for foundations, basement walls, retaining walls, garages, ADUs, and additions. Retaining walls over 4 ft need engineer-stamped plans. Mandatory footing inspection required before structural concrete is placed. Call (425) 257-8810. [web:116]
What are Lawton Clay soils and why do they matter?+
Lawton Clay is a dense glacially deposited marine sediment that underlies much of Everett’s hillside terrain. It compresses significantly under structural load when disturbed and is very slow to drain. Combined with the soft alluvial soils of the Snohomish River floodplain, these conditions require careful subgrade preparation — over-excavation, compacted crushed rock base, and a geotechnical report for foundations — to prevent slab settlement and foundation movement. [web:113]
Can I pour concrete in winter in Everett?+
Yes, but Everett’s Oct–May rainy season makes it very challenging. The main risks are saturated, uncompactable Lawton Clay subgrade and rain hitting fresh concrete. If winter pouring is necessary: wait for 5+ consecutive dry days, verify firm subgrade, use plastic sheeting protection, and cover fresh concrete for the first 4–6 hours. Hard frost is rare in Everett (avg Jan low 35°F), so ACI 306 cold-weather precautions are seldom needed. Best season: June through September.
How thick should an Everett driveway be?+
4 inches minimum for a standard Everett residential driveway — 5 inches strongly recommended over marine clay subgrade. Use 3,000 PSI; rebar or wire mesh over Lawton Clay. Install 4–6 inch compacted crushed rock base. No air entrainment required — Everett averages fewer than 10 significant freeze-thaw events per year. No City of Everett permit needed for private property flatwork.
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Official Everett Concrete Resources
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City of Everett Permit Services
Permit Authority · WSBC 2021 · Snohomish County
Issues all Everett building permits under Washington State Building Code 2021. Required for foundations, structural slabs, retaining walls, ADUs, and garages. Mandatory footing inspection before structural concrete is placed. Retaining walls over 4 ft require engineer-stamped plans. Contact (425) 257-8810.
Visit Everett Permit Services
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L&I — WA Contractor License Check
WA Dept. of Labor & Industries · License Verify
All Washington concrete contractors must hold a valid Washington State Department of Labor & Industries (L&I) contractor registration. WA law requires registration for any project over $500. Always verify your Everett contractor’s L&I registration and check for complaints before signing a contract — unlicensed work voids warranties and creates homeowner liability.
Verify WA Contractor License
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Washington 811 — Call Before You Dig
WA Utility Notification Center · Required by Law
Washington State law requires calling 811 at least 2 business days before any excavation in Everett. Washington 811 coordinates free marking of underground Puget Sound Energy gas/electric, City of Everett water/sewer, and telecom lines. Failure to call is a Washington State law violation with serious safety and financial consequences.