Decks and Porches Cost in Janesville, WI in 2026
Most Decks and Porches projects in Janesville, WI cost between $7,500 and $26,000. The typical price is $13,500.
Janesville prices track the national average closely. Costs here are close enough to the national picture that the adjustment barely moves the number.
What drives the price
- Pressure-treated pine versus composite versus hardwood
- Height off the ground and stair count
- Railing material
- Footing depth required by frost line
Usually included
- Footings, framing and decking
- Railings and stairs
- Fasteners and flashing at the ledger
Usually extra
- Permits
- Under-deck drainage
- Built-in seating or pergola
Unit prices in Janesville, WI
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $25 |
| Mid-range | $46 |
| High-end | $86 |
Deck builders in Janesville, WI
Businesses listed on Google near Janesville, WI. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Legan Construction & Remodeling
4.9(58 reviews)
3446 Stellar Dr, Janesville, WI 53548
JC Builders Inc
4.6(30 reviews)
633 S Franklin St, Janesville, WI 53548
Bello property services llc
5.0(19 reviews)
1516 Bobwhite Ln, Janesville, WI 53546
White Oak Construction, Inc.
4.3(12 reviews)
216 N Terrace St, Janesville, WI 53548
Midwest Deck Builders
5.0(8 reviews)
1116 Cannell Ct, Rockton, IL 61072
Rock River Roofing & Exteriors
4.9(8 reviews)
27 E Racine St, Janesville, WI 53545