61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 144 Google reviews, listed on Google as “Contractor”.
- 5.0★ from 144 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
Best General Contractors in Boulder, CO (2026)
456 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Boulder: Mile High Radon Control, CR Score 61/100; 5.0★ from 144 Google reviews; open 7 days a week.
- 5
Best for emergencies (open 24/7): Home Improvement Boulder, posts 24/7 hours; ranked #5 of 456.
- 2
Most-reviewed: Radon Safety LLC, 668 Google reviews at 4.9★, the most of 456 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
456 Boulder general contractors are ranked here by CR Score, from ten published factors. 25 are open 24/7, 128 open Saturdays and 52 open Sundays, based on posted hours. The median Google rating is 4.8★ across 456 rated businesses.
Top 10 general contractors in Boulder at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Mile High Radon Control | 61 | 5.0★ (144) | Broomfield, 13 mi away | Sat · Sun | Overall |
| 2 | Radon Safety LLC | 60 | 4.9★ (668) | Lakewood, 21 mi away | Sat | Most reviews |
| 3 | Cosman Construction | 59 | 4.7★ (33) | Boulder | Sat · Sun | — |
| 4 | K&H Home Solutions | 59 | 4.8★ (551) | Arvada, 19 mi away | Sat · Evenings | — |
| 5 | Home Improvement Boulder | 59 | 5.0★ (34) | Berthoud, 11 mi away | 24/7 | Emergencies |
| 6 | Full Services LLC | 59 | 5.0★ (19) | Boulder | Sat · Sun · Evenings | — |
| 7 | Big Bear Construction | 58 | 5.0★ (20) | Erie, 11 mi away | 24/7 | — |
| 8 | Colorado Radon Company | 58 | 4.9★ (110) | Denver, 20 mi away | Sat · Sun · Evenings | — |
| 9 | Melton Design Build | 58 | 4.7★ (81) | Boulder | — | — |
| 10 | GIMA RENOVATION | 57 | 4.9★ (40) | Evans, 18 mi away | 24/7 | — |
The 456 best general contractors in Boulder, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Lakewood, 21 mi away
60/100CR ScoreRanked #2 because of its Google rating and review volume: 4.9★ from 668 Google reviews, the most in Boulder.
- 4.9★ from 668 Google reviews
- Hours
- Mon–Sat 8 AM–5 PM · Sun closed
- Address
- 885 Parfet St suite f, Lakewood, CO 80215
Based in Boulder
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 33 Google reviews, listed on Google as “General contractor”.
- 4.7★ from 33 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun 9 AM–5 PM
- Address
- 3401 Arapahoe Ave STE 303, Boulder, CO 80303
Based in Arvada, 19 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.8★ from 551 Google reviews, listed on Google as “Contractor”.
- 4.8★ from 551 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 9 AM–1 PM · Sun closed
- Address
- 6870 W 52nd Ave #107, Arvada, CO 80002
Based in Berthoud, 11 mi away
59/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “Construction company”.
- 5.0★ from 34 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Boulder
59/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 19 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 19 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
Based in Erie, 11 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Construction company”.
- 5.0★ from 20 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1226 Banner Cir, Erie, CO 80516
Based in Denver, 20 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.9★ from 110 Google reviews, listed on Google as “Contractor”.
- 4.9★ from 110 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 2531 W 62nd Ct Unit B, Denver, CO 80221
Based in Boulder
58/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.7★ from 81 Google reviews, listed on Google as “Contractor”.
- 4.7★ from 81 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 3082 Sterling Cir, Boulder, CO 80301
#10 GIMA RENOVATION
Based in Evans, 18 mi away
57/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 40 Google reviews, listed on Google as “Construction company”.
- 4.9★ from 40 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Boulder
57/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “Contractor”.
- 5.0★ from 38 Google reviews
- Hours
- Mon–Fri 7:30 AM–4 PM · Sat–Sun closed
Based in Boulder
57/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 7 Google reviews
- Hours
- Mon–Sun 8 AM–9 PM
#13 Bull Stripers
Based in Derby, 20 mi away
57/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “Construction company”.
- 5.0★ from 31 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Boulder
57/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 34 Google reviews
- Hours
- Mon–Fri 8 AM–4 PM · Sat–Sun closed
- Address
- 5303 Spine Rd #203, Boulder, CO 80301
Based in Louisville, 7 mi away
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 13 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 13 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 10 AM–5 PM · Sun 12 PM–5 PM
- Address
- 357 McCaslin Blvd #200, Louisville, CO 80027
Based in Broomfield, 10 mi away
56/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 35 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 35 Google reviews
- Hours
- Mon–Sat 7 AM–5 PM · Sun closed
Based in Cherry Hills Village, 12 mi away
56/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.1★ from 115 Google reviews, listed on Google as “General contractor”.
- 4.1★ from 115 Google reviews
- Hours
- Mon–Sun 9 AM–8 PM
Based in Broomfield, 12 mi away
56/100CR ScoreRanked #18 because of its Google rating and trade focus: 5.0★ from 42 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 42 Google reviews
- Hours
- Mon–Sat 10 AM–7 PM · Sun closed
- Address
- 1380 US-287, Broomfield, CO 80020
Based in Boulder
56/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.9★ from 31 Google reviews, listed on Google as “General contractor”.
- 4.9★ from 31 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
Based in Westminster, 16 mi away
56/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.5★ from 23 Google reviews, listed on Google as “General contractor”.
- 4.5★ from 23 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4901 W 93rd Ave #1515, Westminster, CO 80031
Based in Arvada, 19 mi away
56/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.9★ from 89 Google reviews, listed on Google as “General contractor”.
- 4.9★ from 89 Google reviews
- Hours
- Mon–Fri 8 AM–7 PM · Sat 9 AM–12 PM · Sun closed
- Address
- 7310 W 52nd Ave A 258, Arvada, CO 80002
Based in Denver, 24 mi away
56/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 175 Google reviews, listed on Google as “Contractor”.
- 4.9★ from 175 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 9 AM–4 PM · Sun closed
- Address
- 1500 N Grant St ste r, Denver, CO 80203
Based in Broomfield, 11 mi away
56/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.8★ from 105 Google reviews, listed on Google as “Contractor”.
- 4.8★ from 105 Google reviews
- Hours
- Mon–Tue 8 AM–5 PM · Wed–Fri 7:30 AM–5 PM · Sat–Sun closed
- Address
- 2150 W 6th Ave suite n-1, Broomfield, CO 80020
Based in Berthoud, 12 mi away
56/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “General contractor”.
- 4.9★ from 48 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 9 AM–12 PM · Sun closed
Based in Boulder
56/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.8★ from 30 Google reviews, listed on Google as “General contractor”.
- 4.8★ from 30 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat–Sun closed
General contractors ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 456 ranked general contractors here; the rest are on their profiles.
Also serving Boulder
20 more general contractors within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Bernie's Plumbing & Heating Company | 4.9★ (434) | In Boulder |
| Boulder Handyman Services | 5.0★ (123) | In Boulder |
| Colorado Custom Paintworks Inc. | 5.0★ (33) | In Boulder |
| Colorado Deck Master Inc. | 4.9★ (114) | In Boulder |
| Decksteriors Inc | 5.0★ (98) | In Boulder |
| Don's Garage Door Repair | 4.9★ (561) | In Boulder |
| DRS | 4.7★ (29) | In Boulder |
| I PAINT STUFF painting company | 5.0★ (107) | In Boulder |
| Ironwood Deck LLC | 5.0★ (30) | In Boulder |
| Jacobsen Brothers Painting | 4.9★ (64) | In Boulder |
| Modern Homestead | 5.0★ (25) | In Boulder |
| Roof Masters of Colorado | 4.9★ (54) | In Boulder |
| Roto-Rooter Plumbing & Water Cleanup | 4.8★ (572) | In Boulder |
| Skycastle Construction | 5.0★ (34) | In Boulder |
| SoBo Homes - A Design Build Remodeling Company | 5.0★ (26) | In Boulder |
| Tectonic Design Build | 4.8★ (27) | In Boulder |
| That 1 Painter Boulder | 4.9★ (120) | In Boulder |
| Thomsen Roofing | 5.0★ (43) | In Boulder |
| Timberline Builders | 4.8★ (48) | In Boulder |
| Veron Builders | 4.6★ (39) | In Boulder |
How much do general contractors cost in Boulder?
Typical prices in USD, adjusted for Colorado with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Kitchen remodel | $14,610 | $27,020 | $41,660 | Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.00 Mountain factor (2025 Cost vs. Value Report) | October 2026 |
| Bathroom remodel | $6,340 | $11,590 | $16,840 | Per bathroom: typical range of customer-reported remodels. US national range × 0.95 Mountain factor (2025 Cost vs. Value Report) | October 2026 |
How we ranked Boulder general contractors
We scored 456 Boulder general contractors on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Boulder data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
General contractors in Boulder: frequently asked questions
Who is the best general contractor in Boulder?
By CR Score, the highest-ranked general contractor in Boulder, CO is Mile High Radon Control with a CR Score of 61/100. It has 5.0★ from 144 Google reviews. It is open 7 days a week. Radon Safety LLC (#2) and Cosman Construction (#3) follow. We ranked 456 general contractors on ten factors, last updated October 22, 2026.
How many general contractors are there in Boulder?
ContractorsRanked ranks 456 general contractors serving Boulder, CO. 18 of them are based in Boulder; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which general contractors in Boulder are open 24/7?
25 ranked general contractors in Boulder post 24/7 hours. The highest-ranked are Home Improvement Boulder (#5), Big Bear Construction (#7) and GIMA RENOVATION (#10). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which general contractors in Boulder work on weekends?
128 of 456 ranked general contractors post Saturday hours and 52 post Sunday hours. The highest-ranked open Saturdays are Mile High Radon Control (#1), Radon Safety LLC (#2) and Cosman Construction (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does kitchen remodel cost in Boulder?
Kitchen remodel typically costs $14,610 to $41,660, with $27,020 typical (Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.00 Mountain factor (2025 Cost vs. Value Report)). The range is adjusted for Colorado. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Boulder general contractors have?
The median Google rating among 456 rated general contractors in Boulder is 4.8★, with a median of 11 reviews. Radon Safety LLC has the most, 668 reviews, and ranks #2. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank general contractors?
Each general contractor gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do general contractors outside Boulder count in this ranking?
Yes, if they are within 25 mi of the Boulder city center, our service radius for general contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for Boulder
- October 2026: CR Scores recalculated for 456 general contractors serving Boulder.
- October 2026: 4 duplicate listings merged.
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