ADU & In-Law Suite Builder Tampa | Onsite

📞 Call Onsite: (813) 394-8783  |  Tampa Bay, FL

Detached ADU and in law suite construction in Tampa Bay FL by Onsite Construction
ADU & In-Law Suites

ADU and In-Law Suite Builder in Tampa, FL

Need a second living space on your property for aging parents, grown kids, or a rental? Onsite designs and builds attached and detached accessory dwelling units across Tampa Bay. We handle the plans, the permits, and the full build so the new space looks like it belonged to your home all along.

✅ State Licensed General Contractor✅ Veteran Owned✅ Free Estimates
Onsite Construction & Restoration Tampa Bay FL

Tampa Bay, FL

Accessory Dwelling Units Built for Tampa Bay Families

As an ADU contractor in Tampa, Onsite builds the second living spaces that growing families and property owners ask for most. That might be a detached cottage in the back yard, a garage that becomes a real apartment, or a suite added onto the side of the house. Each one gets its own bedroom, full bath, and kitchen so the people living there have real privacy and a real front door.

An accessory dwelling unit is a complete, independent home on the same lot as your main house. Some families want it close, attached right off the kitchen so an elderly parent is steps away. Others want it separate and quiet at the edge of the property. We build both, and we walk you through which one fits your lot, your budget, and how you plan to use the space.

From the first set of drawings through the final coat of paint, you work with one team. We pour the slab, frame the walls, run the plumbing and wiring, and finish the inside, then make sure the outside ties into your existing roofline, siding, and trim so it reads as one property and not a box dropped in the yard.

Outgrowing Your Home or Caring for Family?

Maybe a parent can no longer live alone, your adult child moved back, or you want a steady second income from your land. Buying a bigger house in Tampa Bay is expensive and slow. A new unit on the property you already own keeps everyone close and puts your lot to work.

Call Onsite and we will look at your property, talk through what is allowed, and give you a clear path from idea to finished space.

Why Tampa Homeowners Choose Onsite for ADUs

We Match Your Existing Home

We pull the roof pitch, siding, window style, and trim from your main house so the new unit blends in instead of sticking out. The finished property looks planned, not patched together.

Attached or Detached, Your Call

We build suites added onto the house for parents who need to stay close and standalone cottages for privacy or rental use. We help you weigh setbacks, cost, and how each option lives day to day.

We Handle Permits and Zoning

Tampa and the surrounding counties each have their own rules for second units. We pull the permits, prepare the site plan, and keep the project moving through inspections so you are not stuck at the counter.

One Team From Plans to Punch List

Design, slab, framing, mechanicals, and finishes all run through Onsite. Founded by Jason Fausette and building in Tampa Bay since 2006, we stay on your job from the first drawing to the final walkthrough.

Ready to Get Started?

Tell us about your project and we will walk you through the next steps. Reach the Onsite team today.

ADU and In-Law Suite FAQs

What is the difference between an attached and a detached ADU? +
An attached unit shares a wall with your main house, often built off the back or side with its own entrance. A detached accessory dwelling unit sits on its own as a separate building, like a back yard cottage or a converted garage. We build both and help you pick based on your lot and how you want to use it.
Can I build an in law suite for my parents to age in place? +
Yes. As a mother in law suite contractor, we design suites with wider doorways, a curbless shower, and a layout that works for someone who has trouble with stairs. Keeping a parent on the same property means help is close while they still keep their own space and front door.
Can I rent out my ADU for income? +
Many Tampa homeowners build an accessory dwelling unit to rent long term or to family. What you are allowed to do with it depends on your zoning and local short term rental rules, so we go over the current restrictions for your address before you commit to a plan.
Does Tampa allow accessory dwelling units? +
Tampa and the surrounding Hillsborough and Pinellas areas do allow second units in many zoning districts, with limits on size, height, and where the unit can sit on the lot. As an accessory dwelling unit builder in Tampa, we review your parcel early so you know what is possible before drawings begin.
How long does it take to build an ADU? +
Most detached units run about four to seven months from permit approval to move in, and an attached in law suite addition can move faster since some structure is already there. Permitting timelines vary by jurisdiction, and we give you a real schedule once we see the scope.
Do you handle the design or do I need my own architect? +
We can take you all the way from concept through construction, including the plans and engineering your permit requires. If you already have drawings from an architect, we are glad to build from them.
What areas around Tampa do you build in? +
We build ADUs and in law suites across Tampa Bay including South Tampa, St. Petersburg, Clearwater, Brandon, Riverview, Plant City, Lutz, Wesley Chapel, and Carrollwood.

Still Have Questions?

Call and talk it through with the Onsite team. We are happy to answer anything before you decide.

ADU and In-Law Suite Builders Across Tampa Bay

Onsite Construction works with homeowners across the Tampa Bay region including Tampa, South Tampa, St. Petersburg, Clearwater, Brandon, Riverview, Plant City, Lutz, Wesley Chapel, Carrollwood, and surrounding communities throughout Hillsborough and Pinellas County.

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

📞Call (813) 394-8783