📞 Free Estimate: (813) 394-8783  |  Veteran Owned & Operated  |  Tampa Bay, FL

Custom home addition construction project in Tampa Bay FL by Onsite Construction
Home Additions

Expand Your Home with a Custom Addition in Tampa Bay

Onsite Construction specializes in home additions that feel like they were always part of the original design. Primary suites, second stories, kitchen expansions and in-law suites. Veteran owned. 17+ years. 2,700+ projects. 80% repeat clients.

✅ Seamless Integration ✅ Fixed Price Contracts ✅ Design Build Approach ✅ Veteran Owned
Onsite Construction & Restoration Tampa Bay FL

Tampa Bay, FL

"Our addition blends perfectly. You cannot tell where the old home ends and the new begins."

Hyde Park, Tampa FL

Types of Home Additions We Build in Tampa Bay

Primary Suite Additions

A primary suite gives you the bedroom and bathroom you have always wanted without moving. We design the layout around your lifestyle and integrate it with the existing home seamlessly.

Second Story Additions

Adding a second story dramatically increases your square footage while keeping the same footprint. Our structural team evaluates the foundation and frames the new level to code.

Kitchen and Dining Expansions

When your kitchen does not have room for how you cook or entertain an expansion changes everything. We open walls, extend footprints, and design layouts that work with your family.

In-Law and Guest Suites

An in-law suite adds both function and value. We design these with their own entrance, full bath, and living area so the space works as intended for family or long term guests.

Garage Conversions and Additions

Converting an existing garage or adding a new one requires proper permits, structural integration, and finish work that matches the home. Onsite handles every step.

Sunrooms and Florida Rooms

Florida rooms are one of the most requested additions in Tampa Bay. We design and build enclosed or partially open spaces that extend your living area year round.

Ready to Add Space to Your Tampa Bay Home?

Tell us what you are trying to accomplish and we will walk you through how an addition can get you there. Free consultation, no pressure, fixed price contract.

Why Tampa Bay Homeowners Choose Onsite for Additions

2006

Founded

17+ years building across Tampa Bay

2,700+

Projects Completed

From new builds to historic restorations

80%

Repeat Clients

The strongest proof of our work

4.7★

Google Rated

Verified Google reviews

Veteran Owned & Operated

Founded and led by Jason Fausette, serving Tampa Bay since 2006.

Licensed & Insured

State-licensed Florida general contractor with full insurance coverage on every job.

Seamless Integration

Additions designed and built to match your existing home so the result looks original.

Home Addition FAQs

How long does a home addition take to build in Tampa Bay? +
Most home additions in Tampa Bay take 4 to 8 months from permit approval to final walkthrough depending on size and complexity. A primary suite or single-room addition typically takes 4 to 5 months while a second story or larger multi-room addition can run 6 to 8 months. We provide a realistic schedule before construction begins.
Do I need permits for a home addition? +
Yes. Any home addition in Tampa Bay, Hillsborough County, or Pinellas County requires permits and inspections. We handle the entire permit application and approval process for you, coordinating with city and county officials so the project stays on schedule and fully compliant with code.
Will my addition match the existing house? +
Yes. Our design build team carefully matches the rooflines, exterior finishes, trim profiles, and interior details of your existing home so the addition looks like it was always part of the original design. Done right, you should not be able to tell where the old home ends and the new begins.
Can you build a second story on my Tampa Bay home? +
In most cases yes. We start with a structural evaluation of your foundation and existing framing to confirm it can support a second story. If reinforcement is needed we include that in the fixed price contract. Second story additions are one of the most effective ways to double your square footage without changing your lot footprint.
How much value does a home addition add? +
Home additions in Tampa Bay typically return a strong portion of their cost at resale, with primary suite additions, kitchen expansions, and in-law suites among the highest performing. More important than resale value is the day-to-day improvement in how your home works for your family for the years you continue living in it.
What areas do you serve for home additions? +
Onsite Construction & Restoration builds home additions across the entire Tampa Bay area including Tampa, South Tampa, Seminole Heights, Hyde Park, Carrollwood, Westchase, New Tampa, Wesley Chapel, Lutz, Clearwater, St. Petersburg, Palm Harbor, Dunedin, Brandon, Riverview, and surrounding communities across Hillsborough and Pinellas County.

Home Additions Across Tampa Bay

Onsite Construction builds custom home additions for clients across the entire Tampa Bay region including Tampa, South Tampa, Seminole Heights, Tampa Heights, Hyde Park, Ybor City, Carrollwood, Town N Country, Westchase, New Tampa, Temple Terrace, Wesley Chapel, Lutz, Clearwater, St. Petersburg, St. Pete Beach, Palm Harbor, Dunedin, Oldsmar, Brandon, Riverview, Valrico, Tarpon Springs, Apollo Beach, Sun City Center, Pinellas Park, Largo, Gulfport, Kenneth City, and surrounding communities throughout Hillsborough and Pinellas County.

Our office is located at 1305 N. Armenia Ave., Tampa, FL 33607. Get directions from nearby Tampa Bay landmarks: