Home Additions & ADUs in Mansfield, TX

Mansfield spans three counties — Tarrant, Johnson, and Ellis — but no matter which one your lot sits in, a home addition or ADU is permitted through one office: the City of Mansfield Building Safety Department. That single front door matters, because the hardest part of adding on here isn't the framing; it's marrying new construction to an existing house on soil that never sits still. The Remo Guys runs this work as an Allen-based design-build serving Mansfield from about 55 miles north, so we scope additions as destination projects — designed thoroughly up front, then built in tight, well-supervised stretches instead of by a rotating cast of day crews.

Where an addition earns its keep

The early-2000s subdivisions — Lowe's Farm, Twin Creeks, Heritage Estates — were built with the space families needed then, not now. A primary-suite addition, a bumped-out kitchen and family room, or a garage conversion turns a good house in a proven school zone into the one you don't have to leave. In the older streets near downtown and in golf-course neighborhoods like Walnut Creek Valley, the more common ask is a detached ADU or a second-story addition that has to respect an established roofline and lot.

Tying new to old on Eagle Ford clay

An addition is really two foundations that have to move together. Mansfield's Eagle Ford clay swells and shrinks hard with the seasons, and a new slab poured against a twenty- or forty-year-old one — each settled to its own depth — will crack at the joint if the connection isn't engineered for that movement. This is where an addition either disappears into the house or announces itself with a seam down the ceiling. We bring the structural engineer in before design is final, not after the first crack.

The permit path, and the blank corner

Additions and ADUs carry a full plan review. Plans upload to the city's ePlans ProjectDox portal, the contractor and trades register through MyGov, and inspections follow the build. Mansfield keeps one rule out-of-area designers routinely miss: the top-right corner of every plan sheet must be left entirely blank except for the border — a 4.5-inch square, 4.5 inches down from the top and 4.5 inches in from the right, reserved for the city's electronic approval stamp. A sheet that ignores it comes back before review even starts, so we draw to it from day one. The Building Safety Department (817-276-4220) sits at 1200 E. Broad St.

One accountable team, start to finish

An addition touches everything — foundation, roof tie-in, envelope, and the state-licensed electrical, plumbing, and HVAC trades that extend into the new space. As a general contractor that's insured, bonded, and building since 2019, we hold all of it under one plan and one warranty, so the new wing feels like it was always there instead of like a room someone stapled on.