8x10 Mudroom Addition Cost: Fully Itemized (2026 Baseline)
An 80 sf heated mudroom on a new foundation, framed, roofed, sided, wired, heated and finished with a built-in bench, every line itemized with crew hours.
Describe it
Every line, by trade
The mudroom in the Clamp app: described the way you would say it, then every line grouped by trade in the estimate builder. Sample data.
The job at a glance
One build, fully itemized, with crew hours.
| Build | Job cost | Labor | Crew hours | Materials | Illustrative selling price |
|---|---|---|---|---|---|
| A. 8x10 mudroom on a new foundation | $35,588 | $19,297 | 253 to 307 h | $9,576 | $46,265 to $71,177 |
Dump fees and other costs ($6,715) are the same in every build and included in the job cost. Materials include allowances. Illustrative selling price is the job cost at a 30% to 100% markup; your price depends on your own overhead and profit. Labor hours are a planning range and include setup, daily cleanup and material runs; they are never a charge to the customer. Permit and inspection fees are not included; requirements vary by jurisdiction.
The build in detail
A. 8x10 mudroom on a new foundation: $35,588
The patio section comes out, a frost footing goes in, and the room is framed, roofed into the existing wall, sided, insulated, wired, heated off the existing ductwork and finished with LVP and a built-in bench. Labor is $19,297 of the $35,588 job cost, or 54.2%. It is about 253 to 307 hours of work, including setup, daily cleanup and material runs.
Labor cost by trade
Labor only. Materials, allowances and dump fees are in the line items below. Hours are person-hours at typical production from Clamp’s labor hours catalog, as a range: a planning figure, not a schedule and not a charge to the customer.
| Trade | Hours | Labor cost | Low-Overhead×1.30 | Established×1.50 | Full-Service×2.00 |
|---|---|---|---|---|---|
| Permits & PM | 50 to 81 h | $5,165 | $6,715 | $7,748 | $10,330 |
| Demo & Prep | 4 to 8 h | $364 | $473 | $546 | $728 |
| Masonry | 15 to 28 h | $1,838 | $2,389 | $2,757 | $3,676 |
| Electrical | 13 to 20 h | $2,060 | $2,678 | $3,090 | $4,120 |
| HVAC | 16 to 23 h | $1,853 | $2,409 | $2,780 | $3,706 |
| Insulation | 2 to 5 h | $273 | $355 | $410 | $546 |
| Drywall | 12 to 22 h | $824 | $1,071 | $1,236 | $1,648 |
| Carpentry | 51 to 67 h | $4,340 | $5,642 | $6,510 | $8,680 |
| Flooring | 2 to 5 h | $180 | $234 | $270 | $360 |
| Painting | 12 to 17 h | $975 | $1,268 | $1,462 | $1,950 |
| Exterior | 5 to 10 h | $582 | $757 | $873 | $1,164 |
| Roofing | 6 to 9 h | $665 | $864 | $997 | $1,330 |
| Landscaping | 1 to 4 h | $178 | $231 | $267 | $356 |
| Setup, cleanup and material runs | 18 to 55 h | in the prices | |||
| All labor | 253 to 307 h | $19,297 | $25,086 | $28,946 | $38,594 |
Every line item
Labor $19,297 + materials and allowances $9,576 + dump fees and other $6,715 = $35,588 direct job cost. Hours are person-hours at typical production, on labor rows only, and the direct-cost row adds about 15% for setup, daily cleanup and material runs; an allowance or material row names the labor line that installs it, and a subcontract row has none, because the sub’s price includes their own time. Some labor quantities include a difficulty factor, so they can exceed the measured area; each row’s derivation is in the downloadable data.
| Item | Qty | Unit | Hours | Labor | Material | Line cost |
|---|---|---|---|---|---|---|
| Permits & PM | ||||||
| Daily Cleanup & Staging | 7 | ea | 15 to 34 h | $1,540 | $0 | $1,540 |
| Engineering Review Allowance | 1 | ea | $0 | $0 | $850 | |
| Final Cleanup & Walkthrough | 1 | ea | 3 to 9 h | $300 | $0 | $300 |
| Jobsite Supervision Labor | 35 | hr | 22 to 48 h | $3,325 | $0 | $3,325 |
| Permits & PM subtotal | 50 to 81 h | $6,015 | ||||
| Permits & PM subtotal | 50 to 81 h | $6,015 | ||||
| Demo & Prep | ||||||
| Dumpster Rental Weekly | 1 | week | $0 | $0 | $550 | |
| Exterior Demolition Labor | 72 | sf | 1 to 2 h | $115 | $0 | $115 |
| Floor Protection Setup Labor | 80 | sf | under 1 h | $4 | $0 | $4 |
| Site Protection, Minimal (per job) | 1 | ea | under 1 h | $45 | $0 | $45 |
| Site Protection Setup Labor | 0.5 | day | 2 to 6 h | $200 | $0 | $200 |
| Demo & Prep subtotal | 4 to 8 h | $914 | ||||
| Demo & Prep subtotal | 4 to 8 h | $914 | ||||
| Sitework | ||||||
| Excavation Spoils Export (Per Cubic Yard) | 6 | cubic_yard | $0 | $0 | $252 | |
| Foundation Excavation (Machine, Per Cubic Yard) | 10 | cubic_yard | $0 | $0 | $520 | |
| Portable Toilet Rental (per month) | 2 | month | $0 | $0 | $450 | |
| Sitework subtotal | $1,222 | |||||
| Sitework subtotal | $1,222 | |||||
| Masonry | ||||||
| Concrete Footing Install Labor | 27 | lf | 4 to 9 h | $297 | $0 | $297 |
| Concrete Footing MaterialsLabor on: Concrete Footing Install Labor | 29.7 | lf | $0 | $431 | $431 | |
| Foundation Pour Labor | 2.68 | cubic_yard | 9 to 21 h | $1,541 | $0 | $1,541 |
| Foundation Pour MaterialsLabor on: Foundation Pour Labor | 2.95 | cubic_yard | $0 | $841 | $841 | |
| Masonry subtotal | 15 to 28 h | $3,110 | ||||
| Masonry subtotal | 15 to 28 h | $3,110 | ||||
| Electrical | ||||||
| New Branch Circuit (labor) | 2 | ea | 3 to 9 h | $850 | $0 | $850 |
| Dedicated Circuit Breaker AllowanceLabor on: New Branch Circuit (labor) | 2 | ea | $0 | $48 | $48 | |
| Electrical Box and Device MaterialsLabor on: Electrical Rough-In Per Device | 7 | ea | $0 | $60 | $60 | |
| Electrical Rough-In Per Device | 8 | ea | 3 to 7 h | $440 | $0 | $440 |
| Light Fixture AllowanceLabor on: Light Fixture Install | 1 | ea | $0 | $150 | $150 | |
| Light Fixture Install | 1 | ea | 1 to 2 h | $125 | $0 | $125 |
| Outlet/Switch Install | 6 | ea | 1 to 4 h | $390 | $0 | $390 |
| Outlet Unit AllowanceLabor on: Outlet/Switch Install | 4 | ea | $0 | $11 | $11 | |
| Recessed Can AllowanceLabor on: Recessed Light, New Work (open ceiling) | 2 | ea | $0 | $34 | $34 | |
| Recessed Light, New Work (open ceiling) | 2 | ea | 1 to 2 h | $170 | $0 | $170 |
| Romex Wire MaterialsLabor on: Electrical Rough-In Per Device | 172.5 | lf | $0 | $138 | $138 | |
| Smoke / CO Detector AllowanceLabor on: Smoke/CO Detector Install | 1 | ea | $0 | $55 | $55 | |
| Smoke/CO Detector Install | 1 | ea | under 1 h | $85 | $0 | $85 |
| Switch Unit AllowanceLabor on: Outlet/Switch Install | 2 | ea | $0 | $14 | $14 | |
| Electrical subtotal | 13 to 20 h | $2,570 | ||||
| Electrical subtotal | 13 to 20 h | $2,570 | ||||
| HVAC | ||||||
| Ductwork Install | 30 | lf | 3 to 9 h | $345 | $0 | $345 |
| Ductwork MaterialsLabor on: Ductwork Install | 42 | lf | $0 | $326 | $326 | |
| Ductwork Modification | 10 | lf | 3 to 7 h | $420 | $0 | $420 |
| HVAC Commissioning and Balance | 1 | ea | 1 to 5 h | $550 | $0 | $550 |
| HVAC Load Calculation Labor | 1 | ea | 2 to 6 h | $350 | $0 | $350 |
| Register Boot AllowanceLabor on: Ductwork Install | 3 | ea | $0 | $105 | $105 | |
| Register and Grille Install | 3 | ea | under 1 h | $60 | $0 | $60 |
| Return Duct Install Labor | 15 | lf | 1 to 2 h | $128 | $0 | $128 |
| Return Duct MaterialsLabor on: Return Duct Install Labor | 15 | lf | $0 | $143 | $143 | |
| HVAC subtotal | 16 to 23 h | $2,427 | ||||
| HVAC subtotal | 16 to 23 h | $2,427 | ||||
| Insulation | ||||||
| Air Sealing ConsumablesLabor on: Attic Floor Air Sealing (per sf of attic) | 1 | ls | $0 | $450 | $450 | |
| Attic Floor Air Sealing (per sf of attic) | 80 | sf | 1 to 3 h | $76 | $0 | $76 |
| Attic Blown Insulation, Installed (per sf at R-49) | 80 | sf | $0 | $0 | $132 | |
| Floor Insulation from Below, Installed (per sf) | 80 | sf | $0 | $0 | $207 | |
| Eave Ventilation Baffle (per rafter bay) | 9 | ea | under 1 h | $72 | $0 | $72 |
| Insulation Dam Install Labor | 1 | ea | under 1 h | $82 | $0 | $82 |
| Insulation Dam MaterialsLabor on: Insulation Dam Install Labor | 1 | ea | $0 | $75 | $75 | |
| Rim and Sill Air Sealing Labor | 36 | lf | under 1 h | $43 | $0 | $43 |
| Vapor Retarder (per sf) | 80 | sf | $0 | $0 | $68 | |
| Wall Batt Insulation, Installed (per sf) | 214.66 | sf | $0 | $0 | $311 | |
| Insulation subtotal | 2 to 5 h | $1,516 | ||||
| Insulation subtotal | 2 to 5 h | $1,516 | ||||
| Drywall | ||||||
| Drywall Finish Labor | 366.22 | sf | 7 to 15 h | $549 | $0 | $549 |
| Drywall Hang Labor | 366.22 | sf | 3 to 8 h | $275 | $0 | $275 |
| Drywall Sheets MaterialsLabor on: Drywall Hang Labor | 402.84 | sf | $0 | $302 | $302 | |
| Drywall subtotal | 12 to 22 h | $1,126 | ||||
| Drywall subtotal | 12 to 22 h | $1,126 | ||||
| Carpentry | ||||||
| Floor System Framing Labor | 80 | sf | 3 to 7 h | $360 | $0 | $360 |
| Floor System Framing MaterialsLabor on: Floor System Framing Labor | 84 | sf | $0 | $378 | $378 | |
| Custom Built-In Carpentry | 6 | lf | 8 to 19 h | $855 | $0 | $855 |
| Door Lock Hardware AllowanceLabor on: Exterior Door Install | 1 | each | $0 | $150 | $150 | |
| Door/Window Unit AllowanceLabor on: Exterior Door Install | 1 | ea | $0 | $950 | $950 | |
| Exterior Door Install | 1 | ea | 6 to 14 h | $675 | $0 | $675 |
| Exterior Trim Install | 18 | lf | 1 to 2 h | $81 | $0 | $81 |
| Exterior Wall Framing MaterialsLabor on: Stud Wall Framing Install | 28.17 | lf | $0 | $380 | $380 | |
| Roof Rafter/Truss Framing | 0.92 | square | 2 to 5 h | $391 | $0 | $391 |
| Sheathing Install | 306.66 | sf | 2 to 5 h | $383 | $0 | $383 |
| Stud Wall Framing Install | 26.83 | lf | 3 to 8 h | $443 | $0 | $443 |
| Hook Strip Install Labor | 4 | lf | under 1 h | $34 | $0 | $34 |
| Hook Strip MaterialsLabor on: Hook Strip Install Labor | 4 | lf | $0 | $26 | $26 | |
| Door Threshold Transition Labor | 1 | each | under 1 h | $75 | $0 | $75 |
| Open Shelving and Bench MaterialsLabor on: Custom Built-In Carpentry | 6.6 | lf | $0 | $224 | $224 | |
| Permit Drawing Set (Design and Drafting) | 1 | ea | $0 | $0 | $3,375 | |
| Roof Framing MaterialsLabor on: Roof Rafter/Truss Framing | 0.97 | square | $0 | $504 | $504 | |
| Soffit and Fascia Install | 27 | lf | 2 to 6 h | $229 | $0 | $229 |
| Baseboard and Casing Install | 36 | lf | 1 to 2 h | $153 | $0 | $153 |
| Trim MaterialsLabor on: Baseboard and Casing Install | 39.6 | lf | $0 | $83 | $83 | |
| Wall Sheathing MaterialsLabor on: Sheathing Install | 236.13 | sf | $0 | $224 | $224 | |
| Window Caulk & Flash MaterialsLabor on: Window Install | 2 | each | $0 | $96 | $96 | |
| Window and Door Install ConsumablesLabor on: Exterior Door Install | 1 | ea | $0 | $48 | $48 | |
| Window Exterior Trim MaterialsLabor on: Exterior Trim Install | 18 | lf | $0 | $58 | $58 | |
| Window Install | 2 | ea | 5 to 11 h | $481 | $0 | $481 |
| Window Interior Trim Install Labor | 2 | each | 1 to 4 h | $180 | $0 | $180 |
| Window Interior Trim MaterialsLabor on: Window Interior Trim Install Labor | 34 | lf | $0 | $110 | $110 | |
| Window Unit AllowanceLabor on: Window Install | 2 | each | $0 | $575 | $575 | |
| Carpentry subtotal | 51 to 67 h | $11,521 | ||||
| Carpentry subtotal | 51 to 67 h | $11,521 | ||||
| Flooring | ||||||
| Floor Transition MaterialsLabor on: Door Threshold Transition Labor | 1 | ea | $0 | $35 | $35 | |
| Floor Underlayment Materials | 80 | sf | $0 | $44 | $44 | |
| Flooring Install Consumables | 0.4 | ea | $0 | $34 | $34 | |
| LVP/LVT Install | 80 | sf | 2 to 5 h | $180 | $0 | $180 |
| LVP/LVT Material AllowanceLabor on: LVP/LVT Install | 88 | sf | $0 | $308 | $308 | |
| Flooring subtotal | 2 to 5 h | $601 | ||||
| Flooring subtotal | 2 to 5 h | $601 | ||||
| Painting | ||||||
| Paint Finish on New Built-ins | 6 | lf | 2 to 6 h | $288 | $0 | $288 |
| Interior Ceiling Paint Apply Labor | 80 | sf | under 1 h | $77 | $0 | $77 |
| Interior Paint Apply Labor | 286.22 | sf | 2 to 6 h | $206 | $0 | $206 |
| Paint Hardware Removal Labor | 6 | ea | under 1 h | $45 | $0 | $45 |
| Paint Masking Setup Labor | 286.22 | sf | under 1 h | $11 | $0 | $11 |
| Premium Paint AllowanceLabor on: Interior Paint Apply Labor | 2.58 | gallon | $0 | $124 | $124 | |
| Paint Prep Labor | 366.22 | sf | 1 to 3 h | $81 | $0 | $81 |
| Paint Primer Application Labor | 366.22 | sf | 1 to 2 h | $110 | $0 | $110 |
| Paint and Primer MaterialsLabor on: Paint Primer Application Labor | 2.6 | gallon | $0 | $83 | $83 | |
| Paint Sundries Materials | 1 | ls | $0 | $150 | $150 | |
| Trim Caulk and Filler MaterialsLabor on: Trim Paint Apply Labor | 36 | lf | $0 | $8 | $8 | |
| Trim Paint Apply Labor | 70 | lf | 1 to 4 h | $157 | $0 | $157 |
| Painting subtotal | 12 to 17 h | $1,340 | ||||
| Painting subtotal | 12 to 17 h | $1,340 | ||||
| Vanity & Fixtures | ||||||
| Cabinet Install Fasteners and ShimsLabor on: Custom Built-In Carpentry | 6 | lf | $0 | $17 | $17 | |
| Vanity & Fixtures subtotal | $17 | |||||
| Vanity & Fixtures subtotal | $17 | |||||
| Exterior | ||||||
| Exterior Caulking and Sealing Labor | 28 | lf | under 1 h | $49 | $0 | $49 |
| House Wrap Install Labor | 214.66 | sf | 1 to 3 h | $82 | $0 | $82 |
| House Wrap MaterialsLabor on: House Wrap Install Labor | 236.13 | sf | $0 | $99 | $99 | |
| Soffit and Fascia MaterialsLabor on: Soffit and Fascia Install | 27 | lf | $0 | $229 | $229 | |
| Vinyl Siding Install Labor | 214.66 | sf | 3 to 7 h | $451 | $0 | $451 |
| Vinyl Siding MaterialsLabor on: Vinyl Siding Install Labor | 236.13 | sf | $0 | $732 | $732 | |
| Exterior subtotal | 5 to 10 h | $1,642 | ||||
| Exterior subtotal | 5 to 10 h | $1,642 | ||||
| Roofing | ||||||
| Asphalt Shingle Install Labor | 0.92 | square | 1 to 2 h | $175 | $0 | $175 |
| Asphalt Shingle MaterialsLabor on: Asphalt Shingle Install Labor | 1.01 | square | $0 | $177 | $177 | |
| Downspout Install Labor | 2 | ea | 1 to 3 h | $150 | $0 | $150 |
| Downspout MaterialsLabor on: Downspout Install Labor | 2 | ea | $0 | $110 | $110 | |
| Drip Edge MaterialsLabor on: Asphalt Shingle Install Labor | 40.28 | lf | $0 | $38 | $38 | |
| Gutter Install Labor | 18 | lf | 1 to 2 h | $99 | $0 | $99 |
| Gutter MaterialsLabor on: Gutter Install Labor | 19.8 | lf | $0 | $109 | $109 | |
| Ice Water Shield Install Labor | 0.14 | sq | under 1 h | $6 | $0 | $6 |
| Ice Water Shield MaterialsLabor on: Ice Water Shield Install Labor | 0.14 | sq | $0 | $13 | $13 | |
| Magnetic Nail Sweep Labor | 1 | ea | 1 to 3 h | $140 | $0 | $140 |
| Ridge Vent Install Labor | 11.51 | lf | under 1 h | $29 | $0 | $29 |
| Ridge Vent MaterialsLabor on: Ridge Vent Install Labor | 11.51 | lf | $0 | $49 | $49 | |
| Step Flashing Install Labor | 11 | lf | under 1 h | $38 | $0 | $38 |
| Step Flashing MaterialsLabor on: Step Flashing Install Labor | 12.1 | lf | $0 | $21 | $21 | |
| Synthetic Underlayment Install Labor | 0.92 | square | under 1 h | $28 | $0 | $28 |
| Synthetic Underlayment Materials | 0.97 | square | $0 | $15 | $15 | |
| Roofing subtotal | 6 to 9 h | $1,197 | ||||
| Roofing subtotal | 6 to 9 h | $1,197 | ||||
| Landscaping | ||||||
| Site Grading Labor | 215 | sf | under 1 h | $60 | $0 | $60 |
| Sod Install Labor | 215 | sf | 1 to 4 h | $118 | $0 | $118 |
| Sod MaterialsLabor on: Sod Install Labor | 225.75 | sf | $0 | $192 | $192 | |
| Landscaping subtotal | 1 to 4 h | $370 | ||||
| Landscaping subtotal | 1 to 4 h | $370 | ||||
| DIRECT JOB COST | 253 to 307 h | $35,588 | ||||
| DIRECT JOB COST | 253 to 307 h | $35,588 | ||||
Methodology & reproducibility
One reviewed snapshot for this build. The build is frozen from its own estimate run and priced by the published pricer.
Direct cost equals the sum of each row’s rounded quantity × (labor + material + other). Amounts are shown in whole dollars; every column adds to its total.
Scope selection, prose accuracy, arithmetic and provenance mapping reviewed; not independent market-rate verification.
- mudroom-addition-8x10/v1: JSON, CSV, field dictionary
Questions
What drives the cost of a small addition?
The foundation, the shell and the trades show up at almost any size: excavation, footings, framing, roofing tied into the house, siding, insulation, electrical, HVAC, drywall and paint. At 80 sf they spread over few feet, which is why small additions cost more per square foot than houses.
What does this leave out?
Permit fees, structural surprises beyond the engineering review allowance, and any plumbing. The markup table shows illustrative selling prices; direct job cost is not a price.
What would a bathroom in the addition add?
This build has none. A bath adds rough plumbing, fixtures, tile and ventilation; describe one in the estimator to price it for your job.
Sources & provenance
- 8x10 mudroom on a new foundation reviewed snapshot Clamp Research