How much does a garage conversion or extension cost in DFW?

Garage conversions and home extensions with DFW Wall Removal are priced by the size of the space and how much of the work we handle. A simple opening between the house and the garage costs far less than a full conversion with new HVAC, insulation and finishes.

Size: A one-car garage needs less framing, insulation and drywall than a two- or three-car garage.

Floor level: Garage slabs sit lower than the house and slope toward the door. Raising or leveling the floor adds cost.

The wall to the house: Opening it often means a beam, because that wall usually carries part of the roof.

Systems: Heating and cooling, electrical circuits, insulation and any plumbing for a bathroom or wet bar.

You get a written price before any work starts, and it doesn’t change unless you change the scope.

What can a garage become?

Home office: Quiet, separate from the main living area and close to the driveway for clients.

Bedroom or guest suite: Often with a bathroom added, for family visits or aging parents.

Family room or game room: An open space connected to the kitchen or living room.

Gym or studio: A durable floor and good ventilation are the main requirements.

Opening the wall between the house and the garage

The wall between an attached garage and the house is usually load bearing, because it supports part of the roof or the ceiling joists over both spaces. Opening it into a wide passage or removing it entirely needs a beam sized by an engineer, the same way we handle any load bearing wall removal.

That wall is also a fire separation while the space is still a garage. Once the garage becomes living space, the separation requirements change, and the permit covers how the new layout meets code.

Do I need a permit for a garage conversion?

Yes. Converting a garage changes how the space is used, and opening the wall to the house is structural work. The City of Dallas requires a permit to remove any wall or structural element, and most DFW cities require permits for garage conversions and additions. We pull the permit and schedule the inspections.

Parking rules and HOAs

Some cities and many HOAs require a minimum number of covered or off-street parking spaces. Converting the garage can affect that, especially in master-planned communities in Frisco, McKinney, Allen and Prosper.

We check your city’s rules and your HOA guidelines before you commit, so the project doesn’t stall at approval.

Closing the garage door opening

The garage door opening is framed with a header that carries the wall and roof above it. When the door comes out, we frame a new wall in the opening, usually with a window or a door, and tie it into the existing header and foundation.

On the outside, the new wall gets siding or brick that matches the house as closely as possible, so the front of the house doesn’t look like a filled-in garage.

Raising and leveling the garage floor

Garage slabs are usually a step below the house and slope toward the door for drainage. For living space, the floor is leveled and often raised to meet the rest of the house, either with a new framed floor over the slab or with a leveling pour.

We also add a moisture barrier, because an uninsulated slab on North Texas clay can bring moisture and cold into the new room.

Insulation, heating and cooling

Garages aren’t insulated like the house. Walls, ceiling and the new floor are insulated to code so the room stays comfortable in summer and winter.

The new space needs heating and cooling. Depending on the house, that means extending the existing system, adding a zone or installing a ductless unit. A licensed HVAC contractor sizes it, and it’s included in your written price.

Home extensions and additions

An extension adds space beyond the current walls: a room addition, an enclosed patio or a sunroom tied into the house. The structural challenge is the exterior wall where the new space meets the old one.

Exterior walls are almost always load bearing. Opening one to connect the addition needs a beam and new supports, designed by an engineer and coordinated with the roof of the addition.

Enclosing a patio or porch

Enclosing an existing covered patio is often the fastest way to add a room. The slab and the roof are already there, but they were built for outdoor use. The engineer checks that the slab, the posts and the roof can carry walls, windows and insulation before we close it in.

How long does it take?

The structural work usually takes a few days. A full garage conversion or addition, with systems and finishes, takes longer. Engineering and the city permit come first and set the overall timeline.

Structure

Opening the wall to the house, framing the garage door opening or tying in the addition.

Systems and insulation

Electrical, HVAC and plumbing by licensed trades, then insulation.

Finish and inspection

Drywall, floor and final inspections.

Garages and additions in DFW homes

Many DFW homes have two- or three-car attached garages and long driveways, which makes the garage the easiest place to add a room without building outward. In older Dallas and Fort Worth neighborhoods, detached garages and smaller lots make enclosed patios and rear additions more common.

What to ask before you hire

Who designs the structure? A licensed engineer should sign the plan.

Have you checked the parking and HOA rules? Ask before you sign.

Who handles electrical, HVAC and plumbing? They should be licensed and listed in the price.

Who pulls the permit? The contractor should, in their name.

What’s the warranty? Ask for it in writing, with the number of years.

Backed by our 12-year written warranty

The structural work we build — beams, headers and framing — carries a 12-year written warranty. If it doesn’t hold up, we come back and make it right. The warranty transfers to the next owner if you sell.

Windows, light and egress for a bedroom

A garage usually has one door and few windows. If the new room will be a bedroom, code requires an emergency escape opening — a window large enough and low enough to climb out of — along with smoke and carbon monoxide alarms.

We frame the window openings with proper headers, often in the old garage door wall, so the room gets daylight and meets code at the same time.

Converting part of the garage

You don’t have to give up the whole garage. Many homeowners convert one bay into an office or gym and keep the other for a car or storage. A new insulated wall separates the two spaces, and the fire separation between the remaining garage and the living area is kept to code.

Keeping storage when the garage goes away

Most garages hold more than cars. Before the conversion, plan where the tools, holiday boxes and lawn equipment will go: an attic platform, a storage shed or built-in cabinets in the new room. We can frame attic access or a storage wall as part of the project.

Connecting to an addition built by another contractor

If another builder is putting up your addition, we can handle the structural opening into the existing house. We coordinate with your builder on the beam, the supports and the schedule, so the old wall comes out once the new space is closed in and weather-tight.

Living at home during a conversion

A garage conversion happens mostly outside the main living area, so day-to-day life continues. Opening the wall to the house is the noisiest and dustiest step; we seal that opening with plastic and finish it as quickly as possible.

Records for when you sell

A permitted conversion with an engineer’s plan, closed inspections and a transferable written warranty is easy to explain to a buyer. An unpermitted garage room is one of the most common issues home inspectors flag in DFW sales.

Ceiling height in a converted garage

Raising the floor to meet the house takes away some ceiling height, and garage ceilings are often lower than the rest of the home to begin with. We measure the finished height before we design the floor, and when the roof framing allows it, we can raise or vault the garage ceiling so the new room doesn’t feel cramped.

Why DFW Wall Removal

We’re a family-owned company that specializes in structural openings and the work around them. Owner Ernando Teixeira oversees every job, and a licensed engineer signs off on every plan.

Book your estimate

Call (469) 436-5680 or text us photos of your garage, patio or the area you want to extend. Estimates are free, on-site or by photo. We serve Dallas, Plano, Frisco, Richardson, Carrollton, Fort Worth and nearby cities. Open Mon–Fri 6 AM–6 PM and Sat 6 AM–3 PM.

Reviewed by Ernando Teixeira, owner · Updated October 2026