More Space. Better Boards. Same Trusted Frame.

Deck Extensions & Re-Decking in Wisconsin

Reimagine Your Deck Without Rebuilding It

Smart Add-Ons and Upgrades to Expand Your Space

A deck extension can add new life to your backyard—especially if your lifestyle has outgrown your layout. Whether you need space for a grill, hot tub, seating area, or staircase, our team designs and builds extensions that blend seamlessly with your current structure. We match materials, frame to code, and ensure proper footings so the new section is just as secure as the old.

Deck Boards Looking Rough?

We Re-Deck Safely and Seamlessly

If your framing is solid but the boards are warped, cracked, or weathered, re-decking is a smart fix. We remove old surfaces, inspect the structure beneath, and install new boards—wood or composite—depending on your goals. You’ll get the look and feel of a brand-new deck at a fraction of the price of a full rebuild.

  • Replace surfaces, not structure

  • Optional upgrades to stairs and railings

  • Keep your layout—refresh your finish

Re-decking in progress with new composite boards replacing old wood in Madison

A Better Fit for Your Outdoor Life

Extensions Designed Around How You Use Your Space

Your deck should fit your routine—not the other way around. Need room for a second seating area? A pathway to the pool? More space to cook and entertain? We design custom extensions that match your needs and your home’s architecture. From angled additions and corner wraps to multi-level connections, every project is crafted for comfort, style, and flow.

New TimberTech composite boards installed over existing frame in Green Bay

Old Surface, New Strength

Upgrade Materials During Re-Decking

Re-decking gives you a chance to upgrade from wood to composite—or swap out tired boards for a new stain or finish. We work with top brands like Trex, TimberTech, and cedar mills to source long-lasting, attractive decking materials. Our team will verify that your current structure can support new materials, then make any reinforcements needed for safety and longevity.

No Guesswork—Just Clear Plans

From Consultation to Completion, We Handle It All

Not sure what’s possible with your existing deck? That’s where we come in. We start with a detailed inspection, taking note of framing, footings, and fasteners. Then we build a plan—whether it’s a clean re-deck, a seamless extension, or both. You’ll get clear pricing, smart recommendations, and expert crews who treat your home like their own.

Deck extension project with crew adding new stairs and platform section in Waukesha

Why Choose Us for Extensions and Re-Decking

  • Framing Inspection First: We check and confirm your deck's base is solid and safe.

  • Material Matching & Upgrades: Seamless transitions with new boards or blended surfaces.

  • Custom Add-On Designs: Built-in seating, planters, stairs, and more.

  • Local Code Compliance: We handle permits and ensure extensions meet safety standards.

  • Budget-Smart Options: Save thousands by rebuilding only what’s needed.

Don't worry, we can help!

Our Process Makes It Easy

We believe deck improvements shouldn’t be stressful. From your first call, we focus on what’s possible—and practical—for your space. After an on-site review, we’ll show you material samples, layout options, and clear pricing. Whether you’re adding space, upgrading boards, or both, you’ll get a detailed timeline and open communication throughout.

  • Free consultations with layout and material options

  • Timely builds—most done in 2–4 days

  • Cleanup, haul-away, and final inspection included

Residential and Commercial Upgrades

Re-Decking & Extensions for Homes, Rentals, and Businesses

We handle projects big and small—from fresh surfaces on rental decks to expanded restaurant patios and upgraded multi-family units. Need to modernize an aging entry deck or add ADA access? We’ve done it. Our team works efficiently, with safety and long-term value at the forefront. One smart extension or re-deck can completely transform how your space feels and functions.

FAQs About Deck Extensions & Re-Decking

What Homeowners Ask Before Expanding or Re-Surfacing

Here are some of the most common questions we get when clients want to re-deck or extend an existing platform.

Question 1: Can I extend my current deck without starting over?

Yes. As long as the existing framing is structurally sound, we can add space and blend it with new materials.

Question 2: Is re-decking cheaper than building a new deck?

Often, yes. If your framing is in good shape, you can save thousands by just replacing the surface.

Question 3: Will my new boards match the old ones?

We do our best to match or blend materials, or we can re-surface the entire platform for a unified look.

Question 4: Can I add stairs or railings during re-decking?

Absolutely. We often upgrade railings, stairs, and lighting during the process for a full refresh.

Building Commercial Decks Across Wisconsin

Choose the city closest to you!

Deck builders in Appleton WI
Custom decks built in Eau Claire WI
Deck contractors serving Green Bay WI
Janesville wood and composite deck builders
Kenosha outdoor living and deck projects
Composite and cedar decks in Madison WI
Milwaukee’s trusted deck construction company
Deck installations in Oshkosh Wisconsin
Racine backyard deck and patio builders
Waukesha multi-level deck specialists

More Than Just Re-Decking—We Build From the Ground Up

Explore Full Deck Construction, Add-Ons, and Repairs

Custom deck design project in Wisconsin

Deck Design & Construction

Tailored deck layouts built to match your space, needs, and style preferences—designed from scratch for lasting curb appeal.

Composite deck installation with Trex boards

Composite Deck Installation

Durable, low-maintenance composite decks from top brands like Trex, Fiberon, and TimberTech.

Cedar wood deck framing in progress

Wood Deck Building

Natural cedar and pressure-treated lumber decks built for character and strength.

Repairing structural joists on wood deck

Deck Repair & Structural Reinforcement

We fix sagging frames, rotted boards, or loose railings to restore safety and support.

Cedar deck sanding and refinishing work

Deck Restoration & Refinishing

Bring old decks back to life with sanding, staining, sealing, and hardware replacement.

Multi-tiered backyard deck with stairs

Multi-Level Deck Construction

Built on sloped lots or elevated spaces, our tiered decks expand access and views.

Re-decking with composite over old frame

Deck Extensions & Re-Decking

Add square footage or resurface aging planks with new composite or wood decking.

Covered deck with pitched roof

Covered Decks & Patio Roofs

Custom-built covers, patio roofs, and gable-style protection from sun and rain.

Screened-in porch enclosure in Wisconsin

Screened-In Porches & Sunrooms

Fully enclosed porch systems to keep bugs out and fresh air in—ideal for Wisconsin summers.

Outdoor kitchen station on wood deck

Outdoor Kitchens & Grilling Stations

Custom-built BBQ counters, granite tops, and gas lines for entertaining in style.

Backyard pergola with decorative slats

Pergolas, Gazebos & Arbors

Freestanding or attached shade structures crafted in cedar or composite.

Trex deck built around hot tub

Pool Deck & Hot Tub Surrounds

Moisture-resistant decks built to wrap pools, spas, and backyard features.

Shed with adjacent deck space in WI

Detached Garages & Sheds

Deck-attached or freestanding sheds and garages built to match the home’s exterior.

Custom metal deck railing install

Custom Deck Railings & Stairs

Cable, metal, or wood rails and wide stair access customized for safety and style.

Rooftop commercial deck for restaurant

Commercial Deck Projects (Restaurants, Rooftops, etc.)

Rooftop bars, restaurant patios, and public decks built to code with commercial-grade materials.

Icon showing deck board replacement tools and materials

Innovation

Fresh, creative solutions.

Icon for deck extensions with new footings and platforms

Integrity

Honesty and transparency.

Icon representing re-decking upgrades with wood and composite options

Excellence

Top-notch services.

Let’s Build Something Beautiful Together

Whether you’re dreaming of a multi-level lake deck, a backyard grilling station, or a cozy screened porch, our team is ready to bring your vision to life. Alliance Deck Builders of Wisconsin delivers detailed planning, clear communication, and lasting craftsmanship—backed by warranties you can count on. Contact us today to schedule your no-obligation consultation and see how easy it is to start building your ideal outdoor space.

Copyright 2025. Alliance Deck Builders of Wisconsin. All Rights Reserved.