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B Belgres
(267) 265-1842 Free Quote

Nashua, NH

Nashua, NH Window Replacement Contractor

Belgres installs and replaces energy-efficient windows across Nashua, NH. New double- and triple-pane windows cut heating bills through cold New England winters and modernize your home — we measure, remove and install with a clean, weather-tight finish.

5.0 · 49 Google reviews · Licensed & insured

Call (267) 265-1842

Free Windows Quote

No obligation · usually within 24 hours

We’ll only use your info to contact you about your estimate.

What we do

Windows services

Window Replacement

Window Installation

Window Repair

See our windows cost guide

Double vs. Triple Pane Windows

Why Belgres

A windows contractor you can trust

Licensed & insured

Full liability and workers’ comp coverage on every project — your home is protected.

Our own crews

No subcontractor lottery. The team that quotes the job is the team that does it.

Clean & on schedule

Most roofs finished in a single day, with a tidy site and a final walkthrough.

5.0★ reputation

49 five-star reviews from Nashua-area homeowners.

Simple & transparent

How it works

  1. 1

    Free on-site estimate

    We visit, inspect and give you a clear, written quote — no pressure, no hidden fees.

  2. 2

    We do the work

    Our own crews handle the full job — most roofs in a single day — with a clean, tidy site.

  3. 3

    Final walkthrough

    We walk the finished work with you and back it with our workmanship warranty.

Before & After

Recent windows projects

See real windows transformations across Greater Nashua.

Windows · Merrimack, NH

Energy-Efficient Windows

New double-pane windows for comfort and lower heating bills.

Windows · Hudson, NH

New-Construction Windows

Clean, weather-tight window installation on a full renovation.

View all our work

Service areas

Windows near you

Reviews

Windows reviews from your neighbors

★ 5.0 average across 49 Google reviews

G Google
“We have had Serge work for us for many years. I can’t express how happy we always are with his work. Top notch, professional — you can always count on him to do an A1 job.”
Christine G. Repeat client · May 2026
G Google
“Belgres did an excellent job replacing our windows. Installation was quick and clean, and the quality of the windows is top-notch.”
Marta K. Window Replacement · Apr 2026
G Google
“Serge and his team were absolutely fantastic. Got the job done in just one day, which is incredible!”
Jeffrey P. Siding & Roofing · Apr 2026
G Google
“Belgres was my siding contractor for 14 years. Professional, on time, and caring about quality. I’d hire them any day.”
David L. Siding · 14-year client · Mar 2026
G Google
“Used these guys a couple of times to do some jobs with my house. Belgres Group did an amazing job — professional, on time, and made the whole process easy. Quality outstanding.”
Nazarii H. Multiple projects · Feb 2026
G Google
“Serge and his team sided my garage in one day. Professional and a reasonable price.”
Andrei H. Siding · one day · Feb 2026

Read all reviews

Frequently asked questions

How much does windows cost in Nashua, NH?

Cost depends on the size of your home, materials and scope. We give a clear written estimate after a free on-site visit — no surprises. Call (267) 265-1842 to get started.

Do you offer free windows estimates?

Yes — every estimate is free and no-obligation. Most homeowners get a visit scheduled within 24 hours.

Are you licensed and insured?

Belgres Group Inc. is a fully licensed and insured exterior contractor serving Greater Nashua, NH.

What warranty do you offer?

We back our workmanship with a warranty and install manufacturer-warrantied materials. Details are confirmed in your written quote.

Get your free windows estimate

Get a free, no-obligation estimate from a licensed local contractor — usually within 24 hours.

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