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How much does a remodeling project cost in Grantham?
Most remodeling projects in Grantham run $23,000 – $35,000, with a typical remodeling project around $29,000. Adjust the estimate for your job below. Figures reviewed 2026-07.
Estimated range
$23,000 – $35,000
Typical remodeling project around $29,000
A ballpark from regional averages — not a quote. Your price depends on the specifics of the job, so get written quotes from two or three licensed pros before deciding.
How this estimate works
A ballpark from regional averages — not a quote. Your price depends on the specifics of the job, so get written quotes from two or three licensed pros before deciding.
- This is a scoping-grain calculator: the kitchen and bathroom figures reuse the anchors from our dedicated guides (Cost vs. Value 2025 Boston minor kitchen $28,991 and major $84,331, each as ±20% bands; Massachusetts full-bath gut $27,500–$45,000) — use those guides when you want finer inputs.
- Whole-home renovation uses the broad-band local range of $120–$300 per sq ft — cosmetic-heavy scope at the bottom, gut-level renovation with systems work at the top; treat it as a planning bracket, not a bid.
- All figures are all-in project costs with the general contractor's 10–20% fee already inside — not trade labor plus a separate markup.
- The old-home factor (×1.12) is the standard pre-1960 contingency for what opening walls reveals in the region's housing stock.
Ranges reflect published your area contractor pricing and regional cost data, last reviewed 2026-07.
What drives the price
This is the scoping calculator
Kitchen and bathroom remodels have their own cost guides with finer inputs — cabinet grade, wet-area choices, layout changes. This page reuses their anchors at project grain so you can rough out a bigger renovation in one place, then drill into the dedicated guides once the scope firms up.
How the GC prices the job
General contractors make their living on a 10–20% fee over the trades and materials, whether it's stated (cost-plus) or baked into a fixed bid. That fee buys coordination, permits, and accountability — the honest comparison between bids is scope line by line, not the bottom number alone.
The per-square-foot spread
$120 and $300 per sq ft describe different projects: the low end is finishes — paint, floors, fixtures — while the high end guts walls and replaces the systems inside them. In Grantham's older stock, the systems are usually what pushes a renovation toward the top of the band.
Old housing stock
Pre-1960 homes dominate Grantham, and larger renovations open more walls than a single-room remodel — more chances to find knob-and-tube wiring, galvanized plumbing, or undersized framing. Seasoned GCs here carry a contingency for it, and this estimate applies 12% when the old-home toggle is on.
Get real quotes from top-rated general contractors in Grantham
An estimate is a starting point — written quotes are the real number. These are the strongest general contractors on the evidence: reviews weighed across sources and licenses verified against the state registry.
Remodeling Project cost questions, answered
- How much does a general contractor charge in Grantham?
- GCs price the whole project, and their fee — typically 10–20% of the job — is built into every figure here rather than billed separately. In practice that means a minor kitchen remodel runs about $23,000–$35,000 in Grantham, a full bathroom gut $27,500–$45,000, a major kitchen around $67,000–$101,000, and whole-home renovation $120–$300 per sq ft. When comparing bids, make sure each one states whether the fee is inside the number or on top.
- What's the difference between cost-plus and a fixed bid?
- A fixed bid is one number: the contractor carries the risk of surprises and prices some padding in for it, but you know your total on day one. Cost-plus bills actual labor and materials plus a stated fee, usually 10–20% — more transparent, and often cheaper when the scope is genuinely uncertain, but the total is open-ended. The rule of thumb in Grantham: fixed bid for well-defined scope, cost-plus with a cap for old-house work where nobody knows what's behind the plaster.
- How much does a whole-home renovation cost in Grantham?
- The broad band is $120–$300 per sq ft — new finishes throughout at the bottom, a gut renovation with electrical, plumbing, and HVAC work at the top. For a 1,500 sq ft home that's $180,000–$450,000, which is why the per-foot number matters less than pinning down which end of the scope you're on. This is deliberately a wide planning bracket; a GC walkthrough narrows it fast.
- When do I need a general contractor instead of hiring trades directly?
- Once a project involves three or more trades, permits, or structural work, a GC usually earns their 10–20% fee: they sequence the plumber, electrician, and carpenter so nobody waits on anybody, pull the permits, and own the schedule and the punch list as a single point of responsibility. For a one-trade job — painting a house, refinishing floors — hire the specialty contractor directly and skip the markup.