Home Additions in St. Petersburg, FL

Need more room without leaving the neighborhood you love? TGA Kitchens & Remodeling builds home additions across St. Petersburg, from a single extra bedroom to a full primary suite. We are a licensed Florida Certified Building Contractor (CBC1268077), and one team handles your project from design through final inspection. You will see a photorealistic 3D model before we build, and you will get a fixed price up front. Call (727) 800-4050 for a free in-home estimate.

St. Petersburg has transformed into one of Florida's most dynamic cities, blending arts, culture, and waterfront living with historic neighborhoods and modern development. The downtown renaissance has sparked renewed interest in residential areas throughout the city.

Home styles in St. Pete range from historic bungalows in Old Northeast to mid-century modern gems and contemporary waterfront properties. Each architectural style presents unique remodeling opportunities that honor the home's character while adding modern functionality.

The city's thriving food scene and design-conscious culture influence remodeling trends, with homeowners seeking kitchens that support entertaining and bathrooms that serve as personal retreats. Quality craftsmanship is expected in this sophisticated market.

A home addition can mean a lot of things. Here are the ones Tampa Bay homeowners ask us for most.

• Room addition. A new bedroom, office, or great room built onto your existing footprint. It is the most common request, and often the simplest.
• Primary suite addition. A larger bedroom with a walk-in closet and a new bathroom. It pairs naturally with our bathroom remodeling work.
• In-law or ADU suite. A self-contained space with a bedroom, bath, and sometimes a small kitchen. Great for aging parents, adult kids, or rental income.
• Second-story addition. Building up instead of out when your lot is tight. It is the most involved option, since it touches your foundation and roof.
• Sunroom or lanai enclosure. Turning a porch or patio into year-round living space that stands up to Florida heat and humidity.
• Garage conversion. Reclaiming an attached garage as a bedroom, gym, or studio without changing your home footprint.
• Kitchen or bathroom expansion. Pushing out a wall to gain counter space or a bigger shower. We fold this into your kitchen remodel so it is one job, not two.
• Whole-home and structural projects. Bigger reconfigurations that combine an addition with general contracting work across the house.

Not sure which fits? We will walk your home and tell you honestly what makes sense for your lot, your budget, and how you live.

Honestly, we do not price additions by the square foot, because no two are alike. A simple bedroom over an existing slab costs far less per foot than a second story or a suite with new plumbing. That said, most Tampa Bay additions in 2026 land between $195 and $550 per square foot, and where you fall depends on the work below.

• Room addition (bedroom or office), 100 to 200 sq ft: $20,000 to $90,000
• Primary suite with bath, 300 to 450 sq ft: $70,000 to $200,000 and up
• In-law or ADU suite, 400 to 600 sq ft: $90,000 to $300,000 and up
• Second-story addition, 500 to 1,000 sq ft: $150,000 to $500,000 and up
• Sunroom or lanai enclosure, 150 to 300 sq ft: $25,000 to $90,000

For the questions we hear most: a 10x10 room (100 square feet) usually runs about $19,500 to $55,000, and a 12x12 (144 square feet) about $28,000 to $79,000. Treat those as starting points, not quotes.

What moves your number

• Foundation and structure. A second story needs your existing footings checked, and may need reinforcement.
• Plumbing and electrical. A new bathroom or kitchen adds the most cost.
• Matching your home. Lining up rooflines, siding, and windows so the addition does not look bolted on.
• Finishes. Flooring, countertops, and cabinetry choices swing the budget a lot.
• Florida code. Impact windows, wind-rated framing, and flood elevation can add cost, and they are not optional.

We scope all of this during a free in-home visit, then give you one fixed price, so you know your number before we start.

One of the first questions we get is whether it is cheaper to add out or build up. In most of Tampa Bay, adding out is usually cheaper, because building on your existing slab avoids the structural work a second story demands. Building up makes sense when your lot is small, you are in a flood zone where ground-level space is limited, or you want to keep your yard.

You may have heard of the "30% rule." It says to keep any one project under about 30% of your home value. It is a rough gut check, not a law. A well-planned addition in a strong St. Petersburg neighborhood can be worth going past it, especially a primary suite or an in-law unit that adds usable bedrooms. We will give you a straight read on whether your plan pencils out before you commit.

An addition is permitted work, and in our area that is not a formality. Pinellas County requires permits and plan review for additions. Most additions also need engineered drawings and inspections at framing, electrical, plumbing, and final.

Florida building code matters more here than almost anywhere. Your addition has to meet wind-load rules for our hurricane zone, which usually means impact-rated windows and specific framing and tie-downs. If you are in a flood zone, FEMA elevation rules can dictate how high the new floor has to sit, and that shapes the whole design.

This is where a licensed builder earns their keep. We pull the permits, coordinate the engineering, and schedule the inspections, so the work is legal, safe, and will not haunt you at resale. An unpermitted addition is one of the fastest ways to kill a home sale in Florida. (Source: county building departments and the Florida Building Code.)

We keep it simple and predictable:

1. Free in-home consult. We measure, listen, and talk through what is realistic for your home and budget.
2. Photorealistic 3D design. You see your finished addition before we build, so you can change your mind on screen instead of on site.
3. Engineering and permits. We handle the drawings, structural engineering, and county permits.
4. Foundation and framing. We build the shell, tie it into your home, and dry it in to Florida code.
5. Plumbing, electrical, and insulation. The systems behind the walls, inspected at every stage.
6. Finishes. Flooring, paint, trim, cabinetry, and countertops, finished to match your home.
7. Final walkthrough and inspection. We do not call it done until you and the county sign off.

One licensed team runs all of it, so you are never chasing separate subs or wondering who is responsible.

When you are adding to the home you already own, who you hire matters. TGA is a licensed Florida Certified Building Contractor (CBC1268077), not a broker who hands your job to whoever is free. As home addition contractors serving St. Petersburg and the wider bay, we give you:

• One licensed team from design to final inspection.
• A fixed price up front, with no surprise change orders halfway through.
• A photorealistic 3D model so you know exactly what you are getting.
• A real showroom and a 4.9-star reputation across 250 plus reviews.
• Honest local advice, even when that means talking you out of a project that will not pay off.

Want to talk through your addition? Call (727) 800-4050 or request a free in-home estimate.