Avg Total Cost
$288k
2026 estimate
Cost Per Sq Ft
$156
Standard finish
Cost Range
$245k–$360k
low to high
City Index
1.06x
vs state avg
How Much Does It Cost to Build a House in Londonderry in 2026?
Building a home in Londonderry, New Hampshire in 2026 typically costs between $245,072 and $360,400, with most projects landing around $288,320 for a standard 2,000 square foot home. At $156 per square foot, Londonderry is above the New Hampshire state average of $147/sq ft.
These figures are based on 2026 regional construction cost data with a local cost index of 1.06x applied to the New Hampshire baseline. Labor availability, local permitting costs, and material transport costs all contribute to Londonderry's specific pricing.
Cost by Home Size in Londonderry
Home Size
Cost Range
Per Sq Ft
1,000 sq ft
$140,400 — $210,600
$156 — $211
1,500 sq ft
$210,600 — $315,900
$156 — $211
2,000 sq ft
$280,800 — $421,200
$156 — $211
2,500 sq ft
$351,000 — $526,500
$156 — $211
3,000 sq ft
$421,200 — $631,800
$156 — $211
Cost by Finish Level in Londonderry
Finish Level
Per Sq Ft
2,000 sq ft Total
Basic (builder-grade)
$133
$265,200
Standard (mid-range)
$156
$312,000
Premium (high-end)
$211
$421,200
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14-category cost report — adjusted for Londonderry
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How Londonderry Compares to Other New Hampshire Cities
Londonderry ranks #6 of 20 New Hampshire cities we track for construction costs, making it one of the more expensive market in the state. At $156/sq ft, a 2,000 sq ft build in Londonderry runs about $288,320 — $16,320 more than the New Hampshire state average. Builders looking to stretch the budget often also price out Exeter and Salem, where the same home costs less.
City (state rank)
Per Sq Ft
2,000 sq ft home
Londonderry (#6) — this page
$156
$288,320
Where the Money Goes in a Londonderry Build
Applying national new-construction cost shares to Londonderry's $156/sq ft market rate, a standard 2,000 sq ft home budget breaks down roughly like this:
Cost Category
Share
Londonderry est. (2,000 sq ft)
Site work & utilities
8%
$23,066
Framing & structure
16%
$46,131
Exterior: roofing, siding, windows
14%
$40,365
Plumbing, electrical & HVAC
15%
$43,248
Interior finishes: drywall, floors, paint
24%
$69,197
GC overhead, cleanup & contingency
5%
$14,416
Shares are national averages applied to Londonderry's local index (1.06x) — individual bids vary with lot conditions, design complexity and finish selections.
Frequently Asked Questions — Building in Londonderry
How much does it cost to build a house in Londonderry, New Hampshire in 2026?
The average cost to build a house in Londonderry in 2026 is approximately $288,320 for a standard 2,000 sq ft home at $156/sq ft. Costs range from $245,072 on the low end to $360,400 for premium finishes.
Is it cheaper to build or buy a house in Londonderry?
Buying an existing home in Londonderry is often cheaper upfront than building new. However, new construction offers full customization, modern energy efficiency, and no hidden repair costs. Building makes the most sense when inventory is limited or you already own a lot.
How long does it take to build a house in Londonderry?
New home construction in Londonderry typically takes 9-14 months from breaking ground to move-in. Permitting takes 6-12 weeks, foundation and framing 2-3 months, mechanical rough-ins 1-2 months, and finishes 2-3 months.
What is the cheapest way to build a house in Londonderry?
To minimize costs in Londonderry: choose a simple rectangular floor plan, select builder-grade finishes, use a slab foundation where the lot allows, and get at least 3 bids from local general contractors. A basic 1,200 sq ft home can be built for as little as $153,504.
Do I need a permit to build in Londonderry, New Hampshire?
Yes. All new residential construction in Londonderry requires a building permit from the local municipality. Budget $1,500-$4,500 for permit fees and plan for a 6-12 week review period before breaking ground.
Is Londonderry an expensive place to build compared to the rest of New Hampshire?
Londonderry ranks #6 of 20 New Hampshire cities we track, making it one of the more expensive market in the state at $156/sq ft versus the New Hampshire average of $147/sq ft. Nearby lower-cost alternatives include Exeter and Salem.
Other Cities in New Hampshire
Compare construction costs across New Hampshire: