TopFlight Builders

Basements & Additions

Basements & Additions in Atlanta, GA

Expand your living space — finished basements, home additions, and new square footage built to match your home.

Finished basement
Home addition exterior

More space, more value

Basement finishing converts an unfinished basement into usable living space by adding insulation, framed walls, drywall, flooring, lighting, and often a bathroom or wet bar. Home additions expand the home's footprint with new framing, roofline, and finish work tied into the existing structure. TopFlight Builders handles both throughout Greater Atlanta — from permits and framing through flooring and final finishes, designed to flow with your existing home.

  • Basement finishing & build-out
  • Home additions & room expansions
  • Framing, insulation & drywall
  • Flooring, lighting & trim
  • Wet bars & entertainment spaces
  • Permit coordination & inspections
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Frequently Asked Questions

Do I need a permit to finish a basement in Cobb County?

Yes. Any basement finishing involving framing, electrical, plumbing, or HVAC requires a building permit in Cobb County. This isn't optional — unpermitted finished basements create title, insurance, and appraisal problems when you sell. We handle all permit applications and inspection scheduling. Cobb County review for basement finish permits typically runs 3–5 weeks; we factor this into the project start date.

How do I know if my basement has moisture issues before finishing?

We conduct a moisture assessment before any framing begins — checking for efflorescence (mineral deposits from water migration), staining, musty odors, and taking slab moisture readings. If we find active moisture intrusion, we address it before framing. Skipping this step is how finished basements become mold-damaged two years later. We'd rather tell you there's a problem upfront than have you call us with mold in a space we finished.

Can you add a bathroom to my basement?

Yes. It requires breaking the concrete slab to run drain lines below floor level, then patching and finishing. It adds significant scope and cost to the project but dramatically increases usability and resale value of a finished basement. We've done this many times in Cobb County and can advise on placement options based on your existing plumbing stack location and slab depth.

How long does a home addition take from start to finish?

Most single-room additions run 12–20 weeks from permit approval to final finish. Additions requiring structural engineering — load-bearing walls, second-story work — add time on the planning side. Cobb County and Cherokee County permit review for addition projects with architectural plans can take 6–10 weeks. We sequence the planning and permit phase to happen simultaneously with material procurement where possible.

Can a home addition match my existing home's exterior?

We make every effort to match. Siding profile, roofline pitch, window trim, and paint color can typically be matched closely. Perfect matches on older painted wood siding or discontinued profiles are harder — we're honest about which cases those are before we start, not after. New materials in matched positions often weather to blend naturally over 12–24 months.

What is the difference between finishing a basement and a room addition?

A basement finish works within existing below-grade space — framing, insulating, and finishing what's already there. A room addition adds new square footage above grade, requiring foundation work, structural framing, roofing, and a full exterior envelope. Additions cost significantly more per square foot but add to your home's above-grade finished square footage — which matters for appraisal and tax assessment purposes.

How much does a home addition cost?

We don't publish ranges because additions vary too much in scope to make published numbers useful — a sunroom addition is a different project than a full primary suite addition with bathroom and walk-in closet. Most projects in our market fall within a wide range depending on square footage, structural complexity, and finish level. We provide a free written estimate after a site visit and a conversation about what you're actually trying to accomplish.

What does it mean to have one contractor handle a basement finish versus managing trades myself?

With a general contractor, one entity coordinates and is responsible for framing, electrical, plumbing, HVAC, drywall, flooring, and finish work. If the electrician's rough-in conflicts with the plumber's run, that's our problem to solve — not yours. Self-managing trades means you're the project manager: you schedule, you sequence, you handle conflicts, you know what to inspect. Most homeowners underestimate that complexity significantly.

Home Additions Across Greater Atlanta

We serve homeowners throughout Cobb, Cherokee, and North Fulton counties. Choose your city for local pricing context and project examples.

Location

Marietta, GA 30066

Serving Greater Atlanta

Call (404) 369-7129Free Estimate