A full gut renovation runs $100 to $250 per square foot in 2026, which puts a 1,500 sq ft home somewhere between $150,000 and $375,000. That's a $225,000 swing on the same footprint, and it's not random — every dollar of that spread traces back to a decision you make or a surprise the house makes for you.

A gut renovation means you strip the interior down to the studs — sometimes down to the subfloor and joists — and rebuild. New wiring, new plumbing, new HVAC, new insulation, new everything. You're not refreshing a house. You're rebuilding it inside its own shell.

What Pushes You Toward $100/sq ft

The low end assumes you're keeping the existing floor plan, using mid-grade stock finishes, and working in a region with a healthy contractor supply and reasonable labor rates — think much of the Midwest and Southeast.

It also assumes the bones are good. Level floors, square walls, plumbing and electrical that are outdated but accessible, and no asbestos or knob-and-tube lurking behind the drywall. A cosmetic-heavy gut in a structurally sound house is the cheapest version of this project.

What Pushes You Toward $250/sq ft

Three things blow the number up fast. First, moving structure — relocating walls, opening up a load-bearing span, or changing the roofline means engineering, permits, and framing labor that stock layouts never touch.

Second, finish level. Custom cabinetry, natural stone, imported tile, and high-end fixtures can triple the material cost of any given room. A $12,000 kitchen and a $60,000 kitchen occupy the same square footage.

Third, region. Labor in coastal metros — the Bay Area, Boston, Seattle, New York — runs 40 to 70 percent above national averages, and permitting timelines in those cities can add months of carrying costs before a single wall comes down.

The estimate is the easy part. It's what we find after demo that decides whether you're at the top or bottom of the range.— General contractor, 18 years in residential remodels

The Hidden Middle: What's Behind the Walls

The reason the range is genuinely wide — not just marketing caution — is that a gut renovation exposes everything. Rotted sill plates, undersized electrical service, cast-iron drain lines at the end of their life, mold, or a foundation that's settled more than anyone realized.

None of that shows up in the original bid. It shows up on day ten, after demo, when the contractor calls with a change order. Budget 15 to 20 percent as a contingency on any gut job, and more if the house is over 60 years old.

Timeline

Plan on four to nine months from demo to final inspection on a 1,500 sq ft home. Design and permitting eat the first one to three months before construction even starts, and in strict jurisdictions that alone can stretch longer.

The build itself moves in a fixed sequence — demo, rough framing, mechanicals, inspection, insulation, drywall, finishes — and each stage waits on the one before it. You can't compress that order with more money. You can only lose time to delayed inspections, backordered materials, and change orders that stop work while you decide.

Getting a Number You Can Trust

The single biggest variable you control isn't finishes or layout — it's who you hire. A contractor who scopes the job honestly, flags likely surprises up front, and structures payments around completed milestones will land you far closer to a predictable number than the lowest bid on the table.

That's exactly why payment protection matters on a project this size. When a job runs six figures over half a year, the last thing you want is a contractor holding a large deposit against work that hasn't happened yet.