Quantum Deck crew at work on a home in Madison, WI

Deck Builder in Madison, WI

A Deck That Survives Wisconsin Winters

We build and repair decks across Madison, WI, from pressure-treated framing to composite boards that won't warp by July.

Free Estimates
Licensed & Insured
11 Cities Covered
No-Obligation Quotes
What We Do

Our Services

A look at the deck work we handle most, from new builds to the repairs that come a few years in.

Deck Installation

A new deck framed to code, not just nailed to whatever's already there.

Deck Repair

Soft boards, wobbly rails and sunk posts fixed without replacing the whole deck.

Deck Staining & Sealing

Stops gray, splintering wood before it needs replacing.

Custom Deck Design

Multi-level layouts, built-in benches and stairs planned around how you actually use the yard.

Composite Decking Installation

No annual staining, no splinters, boards that won't cup.

Deck Railing Repair & Installation

Rails that meet code and don't rattle after one season.

Who We Are

Deck Work, Not Guesswork

We build and fix decks around Madison, Wisconsin, for homeowners who want to actually use their backyard again. If your deck is twenty years old, the boards have probably cupped, the ledger board might be pulling rot from the siding, and the railing wiggles when you lean on it. That's the deck we get called out for most.

We pull the old ledger flashing and redo it properly so water stops running behind your siding. We set posts on footings below the frost line, 42 inches here, so the deck doesn't heave every spring. Fasteners are stainless or coated for treated lumber, because the wrong screw rusts and streaks the boards within two years.

10+
Years Experience
500+
Projects Completed
11
Cities Served
More About Us
Quantum Deck crew working on a home
Licensed & Insured
Estimates are free, always
Where We Work

Serving Madison, WI

Based in Madison, working decks across the surrounding towns.

Madison, WI
Janesville, WI
Beloit, WI
Sun Prairie, WI
Fitchburg, WI
Middleton, WI
Verona, WI
Stoughton, WI
Waunakee, WI
DeForest, WI
Oregon, WI

Not on the list? Give us a call anyway. We are often working nearby.

Why Choose Us

Why people keep calling us back

Most of our work comes from someone telling a neighbor about us. Here is why that keeps happening.

Licensed and Insured

We carry the insurance that protects your property if something goes wrong.

Permits Pulled Right

We handle the Madison permit and inspection process for you.

We Clean Up After

No stray screws or sawdust left in your yard.

Written Quotes

You get a clear price before any wood gets cut.

On-Schedule Builds

We tell you a start date and we show up on it.

Our Own Crew

The same crew that frames your deck finishes your deck.

Reviews

What people said afterwards

5.0 from 100+ reviews
Had a joist rotted out under the back corner, didn't even know it till it sagged. Fixed it in a day, didn't rebuild the whole deck like another guy quoted.
Dan M.
Deck Repair · Janesville, WI
They had to push our stain date back a week for rain, which was annoying, but the boards looked dry and even when they finally got to it. We're out past Verona, found them through a neighbor.
Carrie L.
Deck Staining & Sealing · Beloit, WI
Went with composite so I'm done staining every other summer. Our place in Sun Prairie gets full sun all afternoon and the boards haven't cupped at all.
Mike T.
Composite Decking Installation · Sun Prairie, WI
Common Questions

Questions we get a lot

Questions people usually ask before booking a deck job.

How much does a new deck cost in Madison, WI?
A pressure-treated deck typically runs lower per square foot than composite or cedar, and price moves with size, number of levels, railing style and stairs. A simple ground-level deck costs less than a multi-level deck with built-in seating and a screened section. Getting an exact number means measuring the space and talking through materials.
Are you licensed and insured?
Yes, deck construction work in Wisconsin should be done by a licensed and insured contractor, and certificates of insurance are available on request. This matters if a footing hits a buried utility line or someone gets hurt on the job site.
How soon can you start my deck project?
Start dates depend on the season and how many jobs are already on the schedule, with spring and early summer being the busiest stretch in Wisconsin. Fall and winter have more openings, though frozen ground can delay footing work until a thaw.
What towns around Madison do you serve?
Deck building and repair service covers Madison and surrounding towns including Sun Prairie, Fitchburg, Middleton, Verona, Waunakee, Stoughton and Janesville. Distance from Madison affects scheduling but not pricing for most jobs within that radius.
Do you work on decks at rental properties or just single-family homes?
Deck work gets done on single-family homes, rental properties, duplexes and some small commercial buildings like restaurants with outdoor seating. Permit requirements and load calculations can differ for commercial decks, so that gets confirmed before quoting.
Will you take on a small job like replacing a few boards?
Small repairs like swapping a handful of rotted boards or tightening a loose railing are worth doing instead of waiting until the whole deck needs rebuilding. Catching rot early on a few boards is a lot cheaper than replacing joists later.
How do I get started with a deck quote?
Call or send a message with the size of the deck you're picturing, or photos of the current deck if this is a repair. A site visit usually follows so measurements and the condition of the existing structure can be checked in person.
What actually affects the cost of a deck?
Lumber choice is the biggest factor, with composite running higher upfront than pressure-treated pine but needing no staining later. Number of levels, stair count, railing style and whether old decking needs tearing out first all add to the total.
Do you require a deposit before starting work?
A deposit is standard before materials get ordered, since lumber and composite decking are bought specifically for each job. The remaining balance is due on completion, with details spelled out in the written quote.
What happens if it rains or snows during the build?
Framing and footing work can pause for heavy rain since wet, unstable ground makes it harder to set posts correctly. Staining and sealing get rescheduled around rain entirely, since the finish requires dry wood and dry weather to cure properly.

Contact Info

Call or Text
(608) 404-7308
Hours
Open 7 days, 8am to 8pm

Get a Free Quote

Send a few details and photos if you have them, a cracked board or a wobbly post is easier to quote with a picture.

Request Sent!

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Call (608) 404-7308