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Drennen Custom Contracting (Radon and Roofing)
#1 in Fort Collins
Ranked by Google ratings, review quality, and response time. Updated April 2026.
608 E Trilby Rd, Fort Collins, CO 80525, USA, Fort Collins, CO 80525
Why they ranked: Our top-ranked pick with an exceptional 5-star rating across 385 Google reviews.
6512 Mayfair Ave, Timnath, CO 80547, USA, Fort Collins, CO 80547
Why they ranked: A close runner-up with an exceptional 5-star rating across 116 Google reviews.
507 Cowan St Ste B, Fort Collins, CO 80524, USA, Fort Collins, CO 80524
Why they ranked: Ranked #3 with an exceptional 5-star rating across 103 Google reviews.
207 W Myrtle St, Fort Collins, CO 80521, USA, Fort Collins, CO 80521
Why they ranked: Ranked #4 with an exceptional 5-star rating from 21 reviews.
310 S Sherwood St, Fort Collins, CO 80521, USA, Fort Collins, CO 80521
Why they ranked: Ranked #5 with an exceptional 5-star rating from 13 reviews.
324 Remington St #110, Fort Collins, CO 80524, USA, Fort Collins, CO 80524
Why they ranked: Ranked #6 with an exceptional 5-star rating.
4691 Concord Ave Unit 1A, Johnstown, CO 80534, USA, Fort Collins, CO 80534
Why they ranked: Ranked #7 with an exceptional 4.9-star rating across 394 Google reviews.
4562 Denrose Ct #5, Fort Collins, CO 80524, USA, Fort Collins, CO 80524
Why they ranked: Ranked #8 with an exceptional 4.9-star rating across 85 Google reviews.
1532 E Mulberry St UNIT E, Fort Collins, CO 80524, USA, Fort Collins, CO 80524
Why they ranked: Ranked #9 with an exceptional 4.9-star rating across 79 Google reviews.
155 N College Ave UNIT 224, Fort Collins, CO 80524, USA, Fort Collins, CO 80524
Why they ranked: Ranked #10 with an exceptional 4.9-star rating across 79 Google reviews.
Rating Score (50%) — Average star rating from Google customer reviews.
Review Volume (30%) — Number of Google reviews. More reviews = greater confidence.
Response Time (20%) — Faster response times earn higher rankings.
Only businesses with 3+ reviews are eligible. Rankings refresh every hour. Paid listings do not influence ranking order.
Drennen Custom Contracting (Radon and Roofing) currently holds the top spot with a 5-star rating across 385 reviews.
No. Paid tiers get additional profile features, but ranking order is determined solely by ratings, reviews, and response time.
List your business and accumulate at least 3 Google reviews. Rankings are automatic and updated hourly.
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