Install Retaining Wall Cost in New Hampshire (2026)
Average cost in New Hampshire: $23 - $92 per square foot
A typical slope retention (100 sq ft) costs $2,300 - $9,200 in New Hampshire
How New Hampshire Compares
New Hampshire is +15% above the national average for install retaining wall.
New Hampshire Typical Cost
$2,300 - $9,200
National Average
$2,000 - $8,000
Average labor rate in New Hampshire: $50/hour
New Hampshire Notes
No state sales tax benefits material costs; varies by town
State sales tax on materials: 0.00%
Calculate Your New Hampshire Cost
Your Estimated Cost
$2,300 - $9,200
Based on 100 square foots in New Hampshire
Prices updated March 2026
Cost Breakdown
What This Means
For 100 square foots in New Hampshire, expect to pay $2,300-$9,200 with mid-range materials that balance quality and cost.
About $2,875 goes to materials and $2,300 covers labor. At $58 per square foot, your project is 15% above the national average.
This is a moderate investment—about the cost of a used car. Many homeowners finance projects this size with a home equity line or contractor financing.
Tips for your project:
- •New Hampshire runs high—consider getting quotes from neighboring areas if feasible.
- •DIY could save you $2,588, but budget extra time and factor in your skill level.
- •A smaller 70 square foot project would run about $4,025.
- •Always get 3 quotes—prices can vary 20-30% between contractors.
What If...
Budget materials
Use builder-grade or economy materials
$1,725 - $6,900
-$2,300 (-40%)
Premium materials
Upgrade to high-end finishes
$3,105 - $12,420
+$460 (8%)
Smaller (75 square foots)
Reduce project scope by 25%
$1,725 - $6,900
-$2,300 (-40%)
Larger (125 square foots)
Expand project scope by 25%
$2,875 - $11,500
+$0 (0%)
DIY installation
Do the work yourself (materials only)
$2,688 - $3,637
-$2,587 (-45%)
What to Ask Your Contractor
1Are you licensed and insured for this type of work?
Are you licensed and insured for this type of work?
Why ask: Protects you from liability if someone gets hurt on your property.
Red flag: Hesitation or claims that insurance "isn't necessary" for this job.
2Can I see references from similar projects?
Can I see references from similar projects?
Why ask: Install Retaining Wall requires specific experience. Past work shows capability.
Red flag: Unable to provide any references or only has very old ones.
3What's included in your $5,750 quote—and what's not?
What's included in your $5,750 quote—and what's not?
Why ask: Prevents surprise charges for permits, disposal, or finishing work.
Red flag: Vague answers or unwillingness to put details in writing.
4Who handles the permit application and inspection scheduling?
Who handles the permit application and inspection scheduling?
Why ask: Permits ensure work meets code and protect your home's resale value.
Red flag: Resistance to pulling permits or suggesting you "don't need one."
5What's your payment schedule, and what triggers each payment?
What's your payment schedule, and what triggers each payment?
Why ask: Standard is a small deposit, then payments tied to milestones.
Red flag: Demanding 50%+ upfront or full payment before work begins.
Show 1 more questions
6What's the realistic timeline, and what could cause delays?
What's the realistic timeline, and what could cause delays?
Why ask: Honest contractors set expectations. Weather, material backorders, and inspections cause delays.
Red flag: Unrealistically short timelines or guarantees of "no delays."
Retaining Wall in New Hampshire FAQs
How much does install retaining wall cost in New Hampshire?
Install Retaining Wall in New Hampshire costs $23 - $92 per square foot in 2026. For a typical slope retention (100 sq ft), expect to pay $2,300 - $9,200. New Hampshire is +15% above the national average.
Do I need a permit for install retaining wall in New Hampshire?
Permits may be required depending on scope for install retaining wall in New Hampshire. No state sales tax benefits material costs; varies by town. Always check with your local building department before starting work.
What is the average labor rate in New Hampshire?
The average skilled trade labor rate in New Hampshire is $50/hour in 2026. This is above the national average. Labor typically accounts for 40% of total install retaining wall costs.
Is New Hampshire expensive for home improvements?
New Hampshire is +15% more expensive than the national average for home improvement projects. Costs are moderate compared to other states.
How do I find a contractor for install retaining wall in New Hampshire?
To find a reputable contractor in New Hampshire: 1) Get 3+ quotes from licensed contractors, 2) Verify their New Hampshire contractor license, 3) Check reviews and references, 4) Confirm insurance coverage, 5) Get a detailed written contract.