Top 10 Mold Remediation Companies in New Hampshire (2026)

Published: May 30, 20262026625 words3 min read

Key Takeaways

10 mold remediation firms in New Hampshire qualified for this ranking based on verified data from public sources (BBB, Google, IICRC, EPA, Yelp, Angi, HomeAdvisor).
The top firm in this ranking is Advanced Mold Detection & Remediation Services, with a MetaScore of 100/100.
Every firm here carries at least one publicly verifiable signal — no firm appears in this article without a cited source.
This list is filtered to firms that explicitly offer mold remediation services. Multi-discipline firms appearing here have that service confirmed on their website or in their public certifications.
Methodology is published in full at restorationindex.com/methodology. Firms can request a correction at restorationindex.com/contact.

Sources cited in this article: Better Business Bureau, Institute of Inspection, Cleaning and Restoration Certification, U.S. Environmental Protection Agency, Google, Yelp, Angi, HomeAdvisor, and Restoration Index.

Based on aggregated public-source data from BBB Business Profiles, Google Business Profile reviews, IICRC certified member directory, EPA Lead-Safe registry, Yelp, Angi Super Service Award lists, and HomeAdvisor recognition, here are the top-ranked mold remediation firms in New Hampshire. Each firm receives a 0-100 Restoration Index MetaScore weighted across 9 sources.

Top 10 Mold Remediation Companies in New Hampshire — Ranked by Multi-Source MetaScore

Advanced Mold Detection & Remediation Services (Derry, NH) — MetaScore 100/100. founded 1993. Read the full review.
Household Environmental, LLC (Derry, NH) — MetaScore 100/100. BBB A+ accredited. Read the full review.
New England Water Remediation, LLC (Manchester, NH) — MetaScore 100/100. BBB A+ accredited. Read the full review.
Rainbow Restoration of Southern New Hampshire (Nashua, NH) — MetaScore 87/100. 4.9-star Google rating across 265 reviews. BBB A+ accredited. Read the full review.
Green Home Solutions of Nashua, NH (Nashua, NH) — MetaScore 86/100. 4.9-star Google rating across 180 reviews. BBB A+ accredited. Read the full review.
SERVPRO of The Seacoast (Dover, NH) — MetaScore 85/100. 4.8-star Google rating across 172 reviews. Read the full review.
Medallion Healthy Homes of New England (Concord, NH) — MetaScore 82/100. 5.0-star Google rating across 25 reviews. BBB A+. founded 2008. Read the full review.
SERVPRO of Concord (Concord, NH) — MetaScore 82/100. 4.3-star Google rating across 35 reviews. BBB A+ accredited. founded 1990. Read the full review.
PuroClean of Strafford County (Concord, NH) — MetaScore 81/100. 5.0-star Google rating across 122 reviews. BBB A+. IICRC certified. founded 2017. Read the full review.
Paul Davis Restoration of Boston North, MA and Southern NH (serving Nashua) (Nashua, NH) — MetaScore 81/100. 4.7-star Google rating across 116 reviews. BBB A+ accredited. IICRC certified. founded 1966. Read the full review.

Top mold remediation firms in Nashua

Rainbow Restoration of Southern New Hampshire leads Nashua with a MetaScore of 87/100 and 265 Google reviews. Other top-ranked firms in Nashua include Green Home Solutions of Nashua, NH (MetaScore 86/100), and Paul Davis Restoration of Boston North, MA and Southern NH (serving Nashua) (MetaScore 81/100).

Top mold remediation firms in Concord

Medallion Healthy Homes of New England leads Concord with a MetaScore of 82/100 and 25 Google reviews. Other top-ranked firms in Concord include SERVPRO of Concord (MetaScore 82/100), and PuroClean of Strafford County (MetaScore 81/100).

Top mold remediation firms in Derry

Advanced Mold Detection & Remediation Services leads Derry with a MetaScore of 100/100. Other top-ranked firms in Derry include Household Environmental, LLC (MetaScore 100/100).

Frequently Asked Questions

How is the Restoration Index MetaScore calculated?

The MetaScore is a weighted average of nine normalized component scores: Google Business Profile reviews (25%), BBB rating + complaint history (20%), IICRC certification (12%), EPA Lead-Safe registry (8%), years in business (10%), Yelp reviews (10%), Angi Super Service Award (5%), HomeAdvisor Top Rated (5%), and regional industry awards (5%). Firms with sparse data have weights redistributed proportionally across the sources we did find. Full methodology at restorationindex.com/methodology.

Who is the top-ranked mold remediation company in New Hampshire?

As of May 2026, Advanced Mold Detection & Remediation Services ranks #1 in New Hampshire for mold remediation with a MetaScore of 100/100. The full ranking and per-firm breakdowns appear below.

How often is this list updated?

Firm-level data (reviews, BBB ratings, certifications) is refreshed every 30 to 90 days depending on the source. Awards and recognition fields refresh annually. The "Last refreshed" date below the article header reflects the most recent data refresh for this article.

Can firms pay to be included or ranked higher?

No. Restoration Index does not accept paid placement. The MetaScore is calculated identically for every firm in the index, whether or not they have any commercial relationship with Pleiades Consultancy (the publisher of this site). The methodology is published in full so firms can audit how the calculation works.

What if a firm I trust is missing from this list?

Coverage is rolling out city by city. If a firm meets our inclusion criteria (operating in the named region, offering mold remediation services, with at least one verifiable public signal), they will appear in future refreshes. Firms can also reach out via restorationindex.com/contact to request inclusion.

Sources & Further Reading

Every claim in this article is backed by at least one of the following third-party sources. Linked out to the publisher so you can audit the original.