Cost to Remodel a House by Size

The single biggest driver of a whole-house remodel budget is simple: how many square feet you are remodeling. At a Bay Area rate of $100 to $500 per square foot, a modest home and a large one can differ by a million dollars for the same finish level. This guide breaks down the cost to remodel a house by size at 1,500, 2,000, 2,500, and 3,000 sq ft, shows what moves the per-square-foot number, and explains how to turn a range into a real bid. It pairs with our cost to remodel a 2,000 sq ft house deep dive and the broader whole house remodel cost guide.

Cost to remodel a house by size

Multiply your square footage by the per-square-foot rate for your finish level and you have a working budget. At $100 to $500 per square foot, a 1,500 sq ft home runs about $150k to $750k and a 3,000 sq ft home about $300k to $1.5M or more. Most Bay Area projects land in the mid-range of $200 to $400 per square foot, so the middle columns below are where to start planning.

These are whole-house figures that assume you are touching most rooms. If you are only remodeling part of the home, scale the numbers to the square footage you are actually reworking. For the per-square-foot logic behind these bands, see our renovation cost per square foot in the Bay Area guide.

Why cost per square foot varies

The $100 to $500 per square foot spread is wide because three things swing the number more than size does:

• Finish level. Stock cabinets, laminate, and builder-grade fixtures sit near $100 to $200 per square foot. Custom cabinetry, stone, wide-plank hardwood, and designer fixtures push toward $400 to $500+. Finishes alone can double the rate on the same floor plan.
• Structural and systems condition. A home that needs a new foundation, rewiring, repiping, or a roof carries costs that a cosmetically dated but sound home does not. Pre-1980 Bay Area houses often need electrical, plumbing, and seismic work that shows up before a single finish is chosen.
• Layout changes. Keeping walls, kitchen, and bathroom locations is the cheapest path. Moving load-bearing walls, relocating plumbing, or opening up the floor plan adds engineering, framing, and systems work that raises the per-square-foot rate across the whole project.

Because these factors compound, two 2,000 sq ft homes can land at $400k and $1M for what looks like the same job. The finish level is your lever; the structural condition is what the inspection reveals.

What you get at each level

Each per-square-foot band buys a different depth of remodel. Here is what the three levels actually include:

• Cosmetic ($100 to $200 per sq ft). Surface-level updates - new paint, flooring, countertops, fixtures, and a refreshed kitchen and bath - while the layout, walls, and systems stay put. Best for a home that is sound but dated.
• Mid-range ($200 to $400 per sq ft). The most common whole-house scope. New kitchen and bathrooms, some layout changes, updated electrical and plumbing where needed, quality finishes, and often better windows and doors. This is where most Bay Area remodels land.
• High-end or full gut ($400 to $500+ per sq ft). Down to the studs. New systems throughout, structural and layout changes, additions, custom cabinetry and millwork, premium finishes, and high-performance windows and insulation. Effectively a new home inside the existing shell.

If your inspection turns up a failing foundation or you are already gutting the home, it is worth weighing the numbers against a rebuild. Our whole house remodel service page walks through where each level makes sense.

Do bigger homes cost less per square foot?

Slightly, but not as much as homeowners hope. Larger homes spread fixed costs - design fees, permits, and crew mobilization - across more square footage, which can shave a little off the per-square-foot rate. But that saving is usually offset by what extra size actually contains.

• More high-cost rooms. Kitchens and bathrooms are the most expensive rooms per square foot. A bigger home tends to have more of them, and those rooms keep the total climbing.
• More systems and materials. More square footage means more wiring, plumbing runs, HVAC capacity, flooring, and paint - costs that scale directly with size.
• Same complexity, more of it. A 3,000 sq ft gut is not cheaper per foot than a 1,500 sq ft gut in any meaningful way; it is simply twice the project.

The practical takeaway: plan by total budget, not by hoping the rate drops. A 3,000 sq ft mid-range remodel at $600k to $1.2M is roughly double a 1,500 sq ft one, and that is the number to budget around.

How to get a real estimate for your home

A per-square-foot range gets you in the ballpark; only design and a real bid get you a number you can build to. The path is short:

• 1. Define scope and finish level. Decide whether you are aiming cosmetic, mid-range, or full gut, and which rooms and layout changes matter most. This picks your column in the table above.
• 2. Get the home inspected. The condition of the foundation, framing, wiring, and plumbing is what separates the low and high ends of the range - and it cannot be guessed from square footage alone.
• 3. Design and price together. A design-build team turns your goals plus the site reality into drawings and a real, itemized bid, so the estimate reflects your home and not a national average.
• 4. Hold a 10 to 20% contingency. Walls open up and reveal surprises, especially in older homes. A reserve keeps the project moving instead of stalling on the first unexpected find.

UniqHaus is a San Jose design-build studio that carries a whole-home remodel from first sketch to final inspection - architecture, interior design, 3D visualization, permitting, and construction under one roof. Homeowners across the Bay Area can see finished work in the portfolio, and when you want a number tied to your home's size and condition, the next step is a conversation - start a conversation with UniqHaus.

Frequently Asked Questions

How much does it cost to remodel a 1,500 sq ft house?

A 1,500 sq ft house typically runs about $150,000 to $750,000 at $100 to $500 per square foot. Most Bay Area projects land in the mid-range of $200 to $400 per square foot, or roughly $300,000 to $600,000, depending on finish level and how much of the structure and systems need work.

How much to remodel a 2,500 sq ft house?

A 2,500 sq ft house typically runs about $250,000 to $1,250,000 at $100 to $500 per square foot. The most common mid-range range of $200 to $400 per square foot puts it around $500,000 to $1,000,000, with the final number driven by finish level, layout changes, and the condition of the foundation, wiring, and plumbing.

How much to remodel a 3,000 sq ft house?

A 3,000 sq ft house typically runs about $300,000 to $1,500,000 or more at $100 to $500 per square foot. A mid-range remodel at $200 to $400 per square foot lands around $600,000 to $1,200,000, and a full down-to-studs gut with high-end finishes pushes past the top of that range.

Do larger homes cost less per square foot to remodel?

Slightly, but not as much as homeowners expect. Larger homes spread fixed costs like design, permits, and mobilization across more square footage, which can lower the per-square-foot rate a little. But more square footage usually means more bathrooms, more kitchen, and more systems, and those high-cost rooms keep the total climbing.

What is the average cost per square foot to remodel?

The average cost per square foot to remodel a whole house in the Bay Area is about $100 to $500, and most projects fall in the mid-range of $200 to $400. Cosmetic refreshes sit near the bottom, while full gut remodels with structural changes and high-end finishes reach the top.