Adding square footage is a different conversation than remodeling within your existing walls — different cost drivers, different timeline, different structural questions. Here’s what the major categories of home additions run in Keller, illustratively. Every home and lot is different; treat these as a starting point.
Primary suite addition (bedroom, bath, closet — new square footage): $250,000–$450,000. Compact additions with a tight footprint land toward the lower end; spa-grade suites with a real walk-in closet and steam shower push toward the upper end.
Sunroom or outdoor living addition (covered patio, outdoor kitchen, screened or glassed-in living space): $80,000–$220,000 depending on whether it’s conditioned space, the roofline tie-in complexity, and finish level.
Second-story addition (new floor over existing footprint): $350,000–$650,000 and up. This is the most structurally involved addition type — it typically requires a full engineering review of the existing foundation and framing before design even begins.
What drives cost on any addition: foundation type, roofline tie-in complexity, matching the addition’s exterior materials to the existing home, and how much of the existing structure needs reinforcement to carry the new load.
Keller doesn’t have a citywide architectural review board — the city handles additions through its standard building permit process. Some individual HOA-governed neighborhoods do maintain their own architectural review committees for exterior changes, so confirm with your specific HOA early if you’re in one, since it can affect timeline.
Call Chad at 817-343-1752 or inquire at swansonrenovations.com/contact.
