# Window Authority

**Trade:** Windows / Siding / Gutters · **Address:** 15 Londonderry Rd #10, Londonderry, NH 03038 · **Phone:** (603) 420-7729 · **Website:** https://www.windowauthority.com/ · **Languages:** English

**Rating: 4.2/5** (high confidence) — from 31 reviews across 5 sources.
94% of sentiment-scored reviews read net-positive. Last 6 months: 1 reviews, 0 negative.

## The honest read

Window Authority Inc. is a family-owned window, door, vinyl siding and roofing company based in Londonderry, New Hampshire, run by owner Tim Talbot and his wife Kim. The company also operates under the name Barwind of New Hampshire, a window and door business with roots going back to 1957, and holds an A+ rating as a BBB Accredited Business.

Homeowners who hired Window Authority consistently point to the same things: Tim's hands-on, no-pressure quoting process, and an installation crew - often named as Bobby, Anthony, Kevin, Chris or Don - that shows up on time and leaves the property clean. Reviewers describe full-house window replacements (in one case, eighteen windows finished in two days), custom entry and patio doors matched to existing hardware, and at least one full roof installation, with both the work itself and the cleanup afterward drawing specific praise. Pricing is frequently described as competitive, and the company states it offers free estimates for window, door, siding and roofing projects across southern New Hampshire, southern Maine and northern Massachusetts.

The company's Google rating stands at 4.8 stars from 33 reviews, and the large majority of the 31 individual reviews on file are five-star accounts of straightforward, well-communicated jobs, some as recent as this spring. Two reviews stand apart from that pattern: in November 2024, one homeowner reported that trim around their new windows was damaged and the caulking left messy with gaps still visible, and another described a basement-window order delayed roughly a month with no proactive update, plus an installation-day incident involving a subcontractor's unprofessional conduct. Both are real, detailed complaints worth asking about directly, even though they sit against an otherwise steady run of positive, specific feedback both before and after them.

Anyone considering Window Authority for a window, door, siding or roofing project should ask about the current installation crew and get a firm timeline in writing, especially for larger or custom orders - the strong majority of customers who did that report a smooth process from quote to cleanup.

**Strengths:**
- Owner involvement — reviewers credit Tim Talbot's honest, hands-on quoting
- Named install crews — Bobby, Anthony, Kevin and Chris praised for clean work
- Thorough cleanup — reviewers note debris and old materials hauled away
- Competitive pricing — customers cite fair quotes against multiple competing bids
- Free estimates — company states quotes are free for window, door, siding and roofing work
- BBB A+ accreditation — accredited business with an A+ rating

**Concerns:**
- Trim and caulking quality — one 2024 review reported damaged trim and gaps
- Delay communication — one 2024 review described a month-long unexplained delay

**Where sources disagree:**
- Nearly all reviews are five stars, but two November 2024 reviews reported installation defects (trim/caulking) and unprofessional subcontractor conduct, an outlier against the otherwise consistent praise.

## Claims & citations

Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication.

- Window Authority Inc. is a family-owned window, door, vinyl siding and roofing company based at 15 Londonderry Rd, Londonderry, NH, serving southern NH, southern Maine and northern Massachusetts. _(confidence: high)_
  - [Official Website](https://www.windowauthority.com) — “Window Authority Inc. is a family-owned window, door, vinyl siding and roofing replacement company based at 15 Londonderry Rd, Londonderry, …”
- The company was founded by Tim and Kim Talbot and later acquired Barwind of New Hampshire, a window and door business in business since 1957. _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “BBB profile for Barwind of New Hampshire by Window Authority (Timothy Talbot, owner), A+ accredited since 2016, 69 years in business, one po…”
  - [Official Website](https://www.windowauthority.com) — “Company history (self-reported): Founded by Tim Talbot (a home-improvement industry veteran) and his wife Kim as a locally owned family comp…”
- Window Authority is based in Londonderry, NH and is a BBB Accredited Business with an A+ rating. _(confidence: high)_
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “Better Business Bureau grade: A+”
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “Better Business Bureau: accredited / certified / member”
- Holds a 4.8-star Google rating from 33 reviews, with the large majority of its 31 on-file reviews rating the installation experience 5 stars. _(confidence: high)_
  - [Google](https://www.google.com/maps/search/?api=1&query=Window%20Authority&query_place_id=ChIJzwiYrvdT4okRl7RLsvc_W0Y) — “Google: 4.8★ from 33 ratings”
- Two 1-star reviews - installation trim/caulking damage and a delayed, poorly communicated basement-window order - are weighed alongside the strong majority of five-star, detailed accounts. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURQa3RXS2p3RRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDPktWKjwE%7C%7C?hl=en) — “1★ Had windows installed in Nov. 24 they ruined my window trim around the windows and the caulking was a mess and still have big gaps”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUNQMHVqRGtRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICP0ujDkQE%7C%7C?hl=en) — “1★ I would not recommend Window Authority or use this company's services again. This company and their employees were incredibly unprofessio…”
- Reviewers repeatedly credit owner Tim Talbot for hands-on, no-pressure quoting and clear communication. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xOcVptOTFXV3hUWkVkalJIbEZPVTV3VDFnM1UyYxAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CAIQACodChtycF9oOlNqZm91WWxTZEdjRHlFOU5wT1g3U2c%7C%7C?hl=en) — “5★ Tim is extremely knowledgeable and personable, which made working with him a breeze. He communicated everything clearly with us, gave us …”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2tSamJXMUdiWEo0ZWpaT2EwWkNiM0UyTUdoRWJGRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CAIQACodChtycF9oOkRjbW1GbXJ4ejZOa0ZCb3E2MGhEbFE%7C%7C?hl=en) — “5★ I recently underwent window replacement and the owner Tim was very relatable, fun and respectful, the windows also turned out better than…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURIOVlpa2RREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDH9YikdQ%7C%7C?hl=en) — “5★ Tim gave my husband and I a very fair quote to replace the storm door and the kitchen/side door of our house. I appreciate Tim working wi…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUQ3cUtMZnNRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgID7qKLfsQE%7C%7C?hl=en) — “5★ Window Authority has been a wonderful contractor to work with. From start to finish. Pricing was fantastic. The job started in time and f…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURqajR2MWVnEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDjj4v1eg%7C%7C?hl=en) — “5★ Tim at Window Authority is excellent to work with! He is honest, professional, easily navigates difficulties and communicates well. His i…”
- Named installation crew members (Bobby, Anthony, Kevin, Chris, Don) are praised across many reviews for meticulous, professional work. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xndFUzSjRaVFUxVDBSSlduQk5ZMlJUYW1OSGVrRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CAIQACodChtycF9oOlgtU3J4ZTU1T0RJWnBNY2RTamNHekE%7C%7C?hl=en) — “5★ I usually do not give reviews however I felt I needed to regarding this company.  The employees are exemplary and very, very knowledgeabl…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VOWGtyUGVHOGJhM0dREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKENXkrPeG8ba3GQ%7C%7C?hl=en) — “5★ We had 10 windows, picture window and sliding glass door replaced. The price was a very fair price out of four quotes. The product exceed…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNQMHUtSkZREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICP0u-JFQ%7C%7C?hl=en) — “5★ My wife & I worked with Anthony, Bobby & Chris recently for some new windows at our home. We had an excellent experience with them from b…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNiXy1uLUp3EAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICb_-n-Jw%7C%7C?hl=en) — “5★ Kevin the installer was excellent and very personable.  Overall I am very pleased.”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURqajR2MWVnEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDjj4v1eg%7C%7C?hl=en) — “5★ Tim at Window Authority is excellent to work with! He is honest, professional, easily navigates difficulties and communicates well. His i…”
- Reviewers frequently note thorough cleanup, with old windows and debris hauled away. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT2xndFUzSjRaVFUxVDBSSlduQk5ZMlJUYW1OSGVrRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CAIQACodChtycF9oOlgtU3J4ZTU1T0RJWnBNY2RTamNHekE%7C%7C?hl=en) — “5★ I usually do not give reviews however I felt I needed to regarding this company.  The employees are exemplary and very, very knowledgeabl…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21Fd1FVOXBjbEF6ZDNSelQwYzJSbGxXV1Rrd1lXYxAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CAIQACodChtycF9oOmEwQU9pclAzd3RzT0c2RllWWTkwYWc%7C%7C?hl=en) — “5★ We replace all of our 30 year old Plaistow NH homes windows (18) using the Window Authority in Londonderry NH. Their prices were quite re…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnTURvbXFmLVNnEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgMDomqf-Sg%7C%7C?hl=en) — “5★ I recently used Window Authority to replace my very old windows. I am very careful with money & looked at many options & met with several…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURUdEphQ3NRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDTtJaCsQE%7C%7C?hl=en) — “5★ Our roof was installed promptly and professionally. The crew did a great job of keeping the yard free of roof debris.”
- Pricing is described as competitive, with several customers noting it beat or matched other quotes they collected. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sCi9DQUlRQUNvZENodHljRjlvT21Fd1FVOXBjbEF6ZDNSelQwYzJSbGxXV1Rrd1lXYxAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CAIQACodChtycF9oOmEwQU9pclAzd3RzT0c2RllWWTkwYWc%7C%7C?hl=en) — “5★ We replace all of our 30 year old Plaistow NH homes windows (18) using the Window Authority in Londonderry NH. Their prices were quite re…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VOWGtyUGVHOGJhM0dREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKENXkrPeG8ba3GQ%7C%7C?hl=en) — “5★ We had 10 windows, picture window and sliding glass door replaced. The price was a very fair price out of four quotes. The product exceed…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNfLWRQVkxREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIC_-dPVLQ%7C%7C?hl=en) — “5★ The quote was extremely competitive, i.e. a no brainer. Workmen arrived at the specified time with 9 double hung new windows. The old dua…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUQ3cUtMZnNRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgID7qKLfsQE%7C%7C?hl=en) — “5★ Window Authority has been a wonderful contractor to work with. From start to finish. Pricing was fantastic. The job started in time and f…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNiXzRlak1nEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICb_4ejMg%7C%7C?hl=en) — “5★ I do quite a bit of home repair and remodel.  I needed to replace a custom door which required framing work.  Window Authority executed e…”
- States it offers free estimates for window, door, siding and roofing projects. _(confidence: high)_
  - [Official Website](https://www.windowauthority.com) — “Stated offer (self-reported): free estimates”
- Performs full-house window replacement including double-hung, casement, bay and bow windows. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNfLWRQVkxREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIC_-dPVLQ%7C%7C?hl=en) — “5★ The quote was extremely competitive, i.e. a no brainer. Workmen arrived at the specified time with 9 double hung new windows. The old dua…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURQamJMTldREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDPjbLNWQ%7C%7C?hl=en) — “5★ Window Authority installed 9 large, custom windows. It was the best experience I ever had with a contractor. From estimate to final measu…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNqM2NpVkhnEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICj3ciVHg%7C%7C?hl=en) — “5★ Bought 13 windows. Everything about the sale was easy and the install went well as expected.
Highly recommend them”
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “Services offered (Better Business Bureau): Bay Windows, Bow Windows, Casement Windows, Entry Doors, Patio Doors, Roofing, Siding, Vinyl Wind…”
- Installs custom entry and patio doors, including matching existing hardware and finishes. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURIOVlpa2RREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDH9YikdQ%7C%7C?hl=en) — “5★ Tim gave my husband and I a very fair quote to replace the storm door and the kitchen/side door of our house. I appreciate Tim working wi…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNiXzRlak1nEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICb_4ejMg%7C%7C?hl=en) — “5★ I do quite a bit of home repair and remodel.  I needed to replace a custom door which required framing work.  Window Authority executed e…”
- Also performs roof installations and offers vinyl siding. _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURUdEphQ3NRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDTtJaCsQE%7C%7C?hl=en) — “5★ Our roof was installed promptly and professionally. The crew did a great job of keeping the yard free of roof debris.”
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “Services offered (Better Business Bureau): Bay Windows, Bow Windows, Casement Windows, Entry Doors, Patio Doors, Roofing, Siding, Vinyl Wind…”
  - [Official Website](https://www.windowauthority.com) — “Window Authority Inc. is a family-owned window, door, vinyl siding and roofing replacement company based at 15 Londonderry Rd, Londonderry, …”
- States it serves towns across southern NH, southern Maine and northern Massachusetts including Concord, Manchester, Nashua, Portsmouth and Salem. _(confidence: medium)_
  - [Official Website](https://www.windowauthority.com) — “Stated service area (self-reported): Concord, Franklin, Manchester, Nashua, Portsmouth, Salem, Berwick, Portland, Saco, Sanford, Wells, York…”
- A November 2024 review reported damaged window trim and messy caulking with gaps still visible. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURQa3RXS2p3RRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDPktWKjwE%7C%7C?hl=en) — “1★ Had windows installed in Nov. 24 they ruined my window trim around the windows and the caulking was a mess and still have big gaps”
- A November 2024 review described a month-long unexplained delay and unprofessional subcontractor conduct on a basement-window order. _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUNQMHVqRGtRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICP0ujDkQE%7C%7C?hl=en) — “1★ I would not recommend Window Authority or use this company's services again. This company and their employees were incredibly unprofessio…”
- Specializes in Windows / Siding / Gutters _(confidence: high)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNfLWRQVkxREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIC_-dPVLQ%7C%7C?hl=en) — “5★ The quote was extremely competitive, i.e. a no brainer. Workmen arrived at the specified time with 9 double hung new windows. The old dua…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURQamJMTldREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDPjbLNWQ%7C%7C?hl=en) — “5★ Window Authority installed 9 large, custom windows. It was the best experience I ever had with a contractor. From estimate to final measu…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURIOVlpa2RREAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDH9YikdQ%7C%7C?hl=en) — “5★ Tim gave my husband and I a very fair quote to replace the storm door and the kitchen/side door of our house. I appreciate Tim working wi…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNiXzRlak1nEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICb_4ejMg%7C%7C?hl=en) — “5★ I do quite a bit of home repair and remodel.  I needed to replace a custom door which required framing work.  Window Authority executed e…”
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUNqM2NpVkhnEAE!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgICj3ciVHg%7C%7C?hl=en) — “5★ Bought 13 windows. Everything about the sale was easy and the install went well as expected.
Highly recommend them”
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “Services offered (Better Business Bureau): Bay Windows, Bow Windows, Casement Windows, Entry Doors, Patio Doors, Roofing, Siding, Vinyl Wind…”
  - [Official Website](https://www.windowauthority.com) — “Window Authority Inc. is a family-owned window, door, vinyl siding and roofing replacement company based at 15 Londonderry Rd, Londonderry, …”
- Also offers Roofing _(confidence: medium)_
  - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSURUdEphQ3NRRRAB!2m1!1s0x0:0x465b3ff7b24bb497!3m1!1s2@1:CIHM0ogKEICAgIDTtJaCsQE%7C%7C?hl=en) — “5★ Our roof was installed promptly and professionally. The crew did a great job of keeping the yard free of roof debris.”
  - [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933) — “Services offered (Better Business Bureau): Bay Windows, Bow Windows, Casement Windows, Entry Doors, Patio Doors, Roofing, Siding, Vinyl Wind…”
  - [Official Website](https://www.windowauthority.com) — “Window Authority Inc. is a family-owned window, door, vinyl siding and roofing replacement company based at 15 Londonderry Rd, Londonderry, …”

## Ownership

- Identifies as family-owned — the business's own statement, not independently verified.

## License

NH doesn't license or register this trade, so there's no state registry to check. That's true of every business in this trade, not specific to this one.

## Sources

- [Google](https://www.google.com/maps/search/?api=1&query=Window%20Authority&query_place_id=ChIJzwiYrvdT4okRl7RLsvc_W0Y): 4.8★ from 33 ratings
- [Google Reviews](https://www.google.com/maps/search/?api=1&query=Window%20Authority&query_place_id=ChIJzwiYrvdT4okRl7RLsvc_W0Y): Listed on this source
- [Better Business Bureau](https://www.bbb.org/us/nh/londonderry/profile/window-installation/barwind-of-new-hampshire-by-window-authority-0051-5000933): Listed on this source
- [Exa](https://reviews.birdeye.com/window-authority-171698801505093): 0 web mentions across the open web (each linked to its source)
- [Official Website](https://www.windowauthority.com): Self-reported profile and service details

## Recent reviews

- **5/5 · Google Reviews · Laureen Greeb · 2026-04-24**: I usually do not give reviews however I felt I needed to regarding this company.  The employees are exemplary and very, very knowledgeable.  Bobby and Anthony were the installers of my windows and were meticulous both in the installation as well as cleanup of the area. Both gentlemen were again very…
- **5/5 · Google Reviews · David Leary · 2026-03-18**: We replace all of our 30 year old Plaistow NH homes windows (18) using the Window Authority in Londonderry NH. Their prices were quite reasonable compared to others. The wait was not very long (about 4 weeks). They worked fast and removed and installed all of the windows in a day. All of the caulkin…
- **5/5 · Google Reviews · Gavin Irons · 2025-11-22**: Unfortunately broke a window and these guys came and saved the day! Absolute 5 star service. Great prices great service great people I will always choose Window Authority for my window needs.
- **5/5 · Google Reviews · Shawn Power · 2025-10-05**: Tim is extremely knowledgeable and personable, which made working with him a breeze. He communicated everything clearly with us, gave us pros and cons for the windows we were looking at, and even gave us tips for fixing our sliding door to avoid having to replace it. Would highly recommend!
- **5/5 · Google Reviews · Paula Merva · 2025-08-31**: We could not be more satisfied with the entire process of replacing all our windows! Tim and his staff were so attentive and the lines of communication were always open! We look forward to working with window authority again in the future!
- **5/5 · Google Reviews · Benjamin Mahoney · 2025-07-19**: I recently underwent window replacement and the owner Tim was very relatable, fun and respectful, the windows also turned out better than I could have ever imagined. These people know how to do windows right!!!
- **5/5 · Google Reviews · Dante Monty · 2025-06-03**: Great service, would 10/10 recommend to anybody. Excellent staff they are all nice and I had the please to meet Tim, he’s the best!
- **5/5 · Google Reviews · Lisa Gazzara · 2025-05-16**: We had 10 windows, picture window and sliding glass door replaced. The price was a very fair price out of four quotes. The product exceeded our expectations, and I love the new picture window and sliding door. Tim and Don were great to work with, Bobby and Anthony have great workmanship skills. Love…
- **5/5 · Google Reviews · Sophia Baston · 2025-05-14**: I would highly recommend Window Authority! From pricing to timeliness to efficiency, their team was on top of it. I love my new windows!
- **5/5 · Google Reviews · MacNeil Jane · 2025-04-24**: I recently used Window Authority to replace my very old windows. I am very careful with money & looked at many options & met with several qualified companies. I chose Window Authority as the best, economical option. I am very happy & noticed the difference during this windy, cold winter. The crew wa…

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Data freshness: last scanned 2026-09-14T20:20:36.464Z.
Cite as: Window Authority — Tavlee (https://tavlee.com/contractor/window-authority-londonderry)
Source: https://tavlee.com/contractor/window-authority-londonderry