Home Additions in Montrose, TX

Most prewar Montrose houses sit on pier and beam foundations, and an addition can either continue that system or go on a new slab beside it. Continuing pier and beam keeps the floor level continuous, keeps the crawlspace access for plumbing, and makes the addition move with the house through Houston's wet and dry seasons. A slab addition against a pier and beam house is cheaper to pour, but the two systems move differently on expansive clay, and the joint between them is where cracks and door problems show up. We design the tie-in to the foundation you have, not to the one that is easiest to build.

Where the existing house is a townhome on a post-tension or conventional slab, the addition goes on a matching slab with a doweled connection, and the engineer specifies how deep the new grade beams go relative to the old ones. Before any of that is drawn, we look at the existing foundation for signs of movement: sloping floors, stuck doors, cracks in the exterior brick or stucco. An addition tied to a foundation that is already moving will move with it. If the house needs leveling or pier work first, that goes into the scope at the start rather than as a change order.

A second-story addition on a Montrose bungalow is a whole-house structural project, not a room set on top. The original walls were framed to carry a roof, and now they carry a floor, walls, another roof, and the people and furniture in between. Studs, headers over windows, and the beams under the first floor all get checked, and on many 1930s houses the piers themselves need to be supplemented to spread the new load into the clay. The engineer's evaluation happens before we draw a single upstairs room, because it decides whether the second story is a modest one or a full floor.

The stair is the other thing a second story asks for, and in a compact floor plan it takes real space from a room downstairs. We locate it where it costs the least, often over a hallway or against an exterior wall, and design the ground floor changes around it. Removing the existing roof to build up also means the house is open to the weather for a period, so second-story work is scheduled around hurricane season and a temporary roof is part of the plan. On townhomes that already have three floors, the addition question is usually a rooftop room or an enclosed space over the garage, which follows the same structural logic.

On an inner-loop lot the buildable envelope is small and the rules that define it matter more than on a suburban lot. Setbacks from the side and rear property lines, a limit on how much of the lot can be covered by structure, and any deed restrictions on your specific street all shape where an addition can go. Some Montrose streets carry restrictions and others do not, and what is allowed on one block in Cherryhurst may not be allowed on the next. We pull the plat and the restrictions for your address before design, because a plan that ignores them gets redrawn at the owner's expense.

The neighbors are part of the site conditions too. A rear addition on a narrow prewar lot puts new windows a few feet from the fence, and a second story looks directly into the yard next door, so window placement and roof pitch are drawn with the neighbor's house on the plan. A friendly conversation before construction goes a long way on a street where people know each other. Permits run through the City of Houston, and the plan review looks at the same setbacks and coverage we designed to, so the review is confirmation rather than a surprise.

A new primary suite brings a bathroom, a closet full of lighting, and a room that has to be cooled through August, and each of those systems has to come from somewhere in the existing house. The air conditioner serving a bungalow was sized for the house as it was, and adding a suite usually means either a larger unit or a separate small system for the addition. We run the load calculation rather than guessing, because an undersized system runs all day and never catches up. Ductwork in a pier and beam house often runs under the floor, which makes extending it to a new room simpler than in a slab house.

Electrical follows the same logic. The addition gets its own circuits, and on an older house that means checking whether the panel has the spaces and the service has the capacity, and pricing a subpanel if it does not. Plumbing for a new bath needs a drain line with fall back to the existing main, and on a lot where the main runs to the alley the new bath may end up on the far side of the house from it. We route the drain in the design phase, sometimes moving the bath a few feet to make it work, so the plumber is not improvising under the house on a Tuesday.

The project starts with a structural look at the existing house and a survey of the buildable envelope, then a design that fits both. From the design we produce engineered drawings, an elevation the deed-restriction review will want if your street has one, and a free itemized quote that separates engineering, foundation, shell, systems, and finishes. You adjust the scope on paper before anything is permitted. Permits run through the City of Houston, and the review is usually the longest quiet stretch in the schedule, so we submit as soon as the drawings are final.

Construction runs foundation first, with its cure time, then framing and roof, then the point where the addition is dried in and the wall between old and new can be opened. We keep that wall closed as long as the sequence allows so the house stays sealed from dust and weather. Rough-ins for plumbing, electrical, and HVAC follow, each inspected, then insulation, drywall, and finishes that match the original house room by room. An addition on a Montrose lot means a dumpster and material deliveries on a narrow street, so we set the logistics with you and with the neighbors before the first truck arrives.