90/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 37 Google reviews, open 24/7.
- 4.9★ from 37 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9841 Washingtonian Blvd, Gaithersburg, MD 20878
Best General Contractors in Gaithersburg, MD (2026)
1,539 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Gaithersburg: Atlantis Design and Build, CR Score 90/100; 4.9★ from 37 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): DeTOP Services LLC, posts 24/7 hours; ranked #3 of 1,539.
- 3
Most-reviewed: DeTOP Services LLC, 134 Google reviews at 5.0★, the most of 1,539 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,539 Gaithersburg general contractors are ranked here by CR Score, from 8 published factors. 119 are open 24/7, 827 open Saturdays and 312 open Sundays, based on posted hours. The median Google rating is 5.0★ across 1,539 rated businesses.
Most of this list also appears on the General contractors in Germantown ranking. See General contractors in Germantown
Top 10 general contractors in Gaithersburg at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Atlantis Design and Build | 90 | 4.9★ (37) | Gaithersburg | 24/7 | Overall |
| 2 | Global Renovations LLC | 90 | 5.0★ (104) | Gaithersburg | Sat · Sun · Evenings | — |
| 3 | DeTOP Services LLC | 89 | 5.0★ (134) | Sudley, 19 mi away | 24/7 | Emergencies, Most reviews |
| 4 | ND Contractors | 89 | 5.0★ (22) | Aspen Hill, 1 mi away | 24/7 | — |
| 5 | Paradise Construction & Remodeling | 88 | 4.9★ (66) | Gaithersburg | Sat · Sun · Evenings | — |
| 6 | Equality Builders | 88 | 4.9★ (52) | Bethesda, 10 mi away | 24/7 | — |
| 7 | BasementRemodeling.com | 88 | 5.0★ (77) | Rockville, 5 mi away | Sat · Sun · Evenings | — |
| 8 | iRoof USA | 88 | 5.0★ (29) | Rockville, 7 mi away | 24/7 | — |
| 9 | Stello Homes Design Build | 88 | 5.0★ (108) | Chantilly, 22 mi away | 24/7 | — |
| 10 | First American General Contracting | 88 | 5.0★ (26) | North Bethesda, 8 mi away | 24/7 | — |
The 1,539 best general contractors in Gaithersburg, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Gaithersburg
90/100CR ScoreRanked #2 because of its Google rating and trade focus: 5.0★ from 104 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 104 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 1023 Southern Night Ln, Gaithersburg, MD 20879
Based in Sudley, 19 mi away
89/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 134 Google reviews, open 24/7.
- 5.0★ from 134 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Aspen Hill, 1 mi away
89/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 22 Google reviews, open 24/7.
- 5.0★ from 22 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Gaithersburg
88/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 66 Google reviews, listed on Google as “General contractor”.
- 4.9★ from 66 Google reviews
- Hours
- Mon–Sun 7 AM–9 PM
- Address
- 9701 Fields Rd, Gaithersburg, MD 20878
Based in Bethesda, 10 mi away
88/100CR ScoreRanked #6 because of its Google rating and availability: 4.9★ from 52 Google reviews, open 24/7.
- 4.9★ from 52 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 10800 Connecticut Ave, Kensington, MD 20895
Based in Rockville, 5 mi away
88/100CR ScoreRanked #7 because of its Google rating and trade focus: 5.0★ from 77 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 77 Google reviews
- Hours
- Mon–Fri 8 AM–12 AM · Sat–Sun 9 AM–9 PM
- Address
- 1680 E Gude Dr, Rockville, MD 20850
#8 iRoof USA
Based in Rockville, 7 mi away
88/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 29 Google reviews, open 24/7.
- 5.0★ from 29 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1801 Chapman Ave Suite 314, Rockville, MD 20852
Based in Chantilly, 22 mi away
88/100CR ScoreRanked #9 because of its Google rating and availability: 5.0★ from 108 Google reviews, open 24/7.
- 5.0★ from 108 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4460 Brookfield Corporate Dr #E, Chantilly, VA 20151
Based in North Bethesda, 8 mi away
88/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 26 Google reviews, open 24/7.
- 5.0★ from 26 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11810 Grand Park Ave # 500, North Bethesda, MD 20852
Based in Gaithersburg
88/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.8★ from 57 Google reviews, listed on Google as “General contractor”.
- 4.8★ from 57 Google reviews
- Hours
- Mon–Sun 9 AM–7 PM
- Address
- 9711 Washingtonian Blvd Suite 550, Gaithersburg, MD 20878
Based in Columbia, 19 mi away
87/100CR ScoreRanked #12 because of its Google rating and availability: 5.0★ from 51 Google reviews, open 24/7.
- 5.0★ from 51 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11110 Broken Land Pkwy, Columbia, MD 21044
Based in Gaithersburg
86/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 13 Google reviews, open 24/7.
- 5.0★ from 13 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 13 School Dr, Gaithersburg, MD 20878
#14 i4 Improvements
Based in Arlington, 19 mi away
86/100CR ScoreRanked #14 because of its Google rating and availability: 4.9★ from 55 Google reviews, open 24/7.
- 4.9★ from 55 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1104D N Quincy St, Arlington, VA 22201
Based in Gaithersburg
86/100CR ScoreRanked #15 because of its Google rating and trade focus: 5.0★ from 27 Google reviews, listed on Google as “Construction company”.
- 5.0★ from 27 Google reviews
- Hours
- Mon–Fri 7 AM–7 PM · Sat 7:30 AM–6 PM · Sun 9 AM–4 PM
- Address
- 19402 Torran Rocks Terrace, Gaithersburg, MD 20879
Based in Clarksburg, 7 mi away
86/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 15 Google reviews, open 24/7.
- 5.0★ from 15 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 22704 Broadway Ave, Clarksburg, MD 20871
Based in Germantown, 1 mi away
86/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 26 Google reviews
- Hours
- Mon–Sun 8 AM–9 PM
Based in Germantown, 4 mi away
86/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 42 Google reviews, listed on Google as “Construction company”.
- 4.9★ from 42 Google reviews
- Hours
- Mon–Sat 8 AM–6 PM · Sun 8 AM–5 PM
- Address
- 13205 Cloppers Mill Dr, Germantown, MD 20874
Based in Poolesville, 11 mi away
86/100CR ScoreRanked #19 because of its Google rating and availability: 5.0★ from 19 Google reviews, open 24/7.
- 5.0★ from 19 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 19503 Hartz Pond Ct, Poolesville, MD 20837
Based in Washington, D.C., 18 mi away
86/100CR ScoreRanked #20 because of its Google rating and availability: 5.0★ from 36 Google reviews, open 24/7.
- 5.0★ from 36 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2121 14th St NW, Washington, DC 20009
Based in Mount Vernon, 24 mi away
86/100CR ScoreRanked #21 because of its Google rating and availability: 5.0★ from 96 Google reviews, open 24/7.
- 5.0★ from 96 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Reston, 15 mi away
86/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 119 Google reviews, listed on Google as “Construction company”.
- 5.0★ from 119 Google reviews
- Hours
- Mon–Fri 10 AM–5 PM · Sat 10 AM–4 PM · Sun 11 AM–4 PM
- Address
- 11710 Plaza America Dr Suite 710, Reston, VA 20190
Based in Annandale, 21 mi away
86/100CR ScoreRanked #23 because of its Google rating and availability: 5.0★ from 47 Google reviews, open 24/7.
- 5.0★ from 47 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4202 Whitney St #10, Annandale, VA 22003
Based in Rockville, 6 mi away
86/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 37 Google reviews
- Hours
- Mon–Sun 7 AM–6 PM
- Address
- 16006 Sycamore Ln, Rockville, MD 20853
Based in Gaithersburg
85/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.9★ from 36 Google reviews, listed on Google as “General contractor”.
- 4.9★ from 36 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
- Address
- 8901 Emory Grove Rd, Gaithersburg, MD 20877
How much do general contractors cost in Gaithersburg?
Typical prices in USD, adjusted for Maryland with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Kitchen remodel | $14,650 | $27,090 | $41,780 | Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.00 South Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
| Bathroom remodel | $6,520 | $11,910 | $17,300 | Per bathroom: typical range of customer-reported remodels. US national range × 0.98 South Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
How to check a general contractor's license in Maryland
In Maryland, Maryland Home Improvement Commission licenses Home improvement contractor licenses for residential work.
- Check that the status is active and the name matches the contract or truck.
- Ask for proof of insurance before work starts.
No chip usually means we have not matched a state record yet. Check the lookup yourself before you hire.
Guide checked October 2026. How we verify licenses
How we ranked Gaithersburg general contractors
We scored 1,539 Gaithersburg general contractors on 8 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. Unknown factors are left out of the score, 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 Gaithersburg data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
General contractors in Gaithersburg: frequently asked questions
Who is the best general contractor in Gaithersburg?
By CR Score, the highest-ranked general contractor in Gaithersburg, MD is Atlantis Design and Build with a CR Score of 90/100. It has 4.9★ from 37 Google reviews. It is open 24/7. Global Renovations LLC (#2) and DeTOP Services LLC (#3) follow. We ranked 1,539 general contractors on 8 factors, last updated October 22, 2026.
How many general contractors are there in Gaithersburg?
ContractorsRanked ranks 1,539 general contractors serving Gaithersburg, MD. 7 of them are based in Gaithersburg; the rest serve it from nearby towns. Counts are as of October 2026.
Which general contractors in Gaithersburg are open 24/7?
119 ranked general contractors in Gaithersburg post 24/7 hours. The highest-ranked are Atlantis Design and Build (#1), DeTOP Services LLC (#3) and ND Contractors (#4). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which general contractors in Gaithersburg work on weekends?
827 of 1,539 ranked general contractors post Saturday hours and 312 post Sunday hours. The highest-ranked open Saturdays are Atlantis Design and Build (#1), Global Renovations LLC (#2) and DeTOP Services LLC (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check a general contractor's license in Maryland?
In Maryland, Maryland Home Improvement Commission handles licensing and covers Home improvement contractor licenses for residential work.
How much does kitchen remodel cost in Gaithersburg?
Kitchen remodel typically costs $14,650 to $41,780, with $27,090 typical (Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.00 South Atlantic factor (2025 Cost vs. Value Report)). The range is adjusted for Maryland. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Gaithersburg general contractors have?
The median Google rating among 1,539 rated general contractors in Gaithersburg is 5.0★, with a median of 9 reviews. DeTOP Services LLC has the most, 134 reviews, and ranks #3. 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 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Update log for Gaithersburg
- October 2026: CR Scores recalculated for 1,539 general contractors serving Gaithersburg.
- October 2026: 13 duplicate listings merged.
More general contractors and Gaithersburg pages
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Other trades in Gaithersburg
- Roofers in Gaithersburg1543 ranked
- Plumbers in Gaithersburg805 ranked
- Electricians in Gaithersburg708 ranked
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- Handymen in Gaithersburg172 ranked
- Kitchen remodelers in Gaithersburg1188 ranked
- Bathroom remodelers in Gaithersburg1182 ranked
- Flooring contractors in Gaithersburg806 ranked
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- Drywall contractors in Gaithersburg12 ranked
- Concrete contractors in Gaithersburg334 ranked
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- Deck builders in Gaithersburg461 ranked
- Siding contractors in Gaithersburg663 ranked
- Window installers in Gaithersburg730 ranked
- Gutter installers in Gaithersburg361 ranked
- Insulation contractors in Gaithersburg140 ranked
- Solar installers in Gaithersburg196 ranked
- Garage door repair companies in Gaithersburg166 ranked
- Foundation repair companies in Gaithersburg219 ranked
- Tree services in Gaithersburg332 ranked
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- Water damage restoration companies in Gaithersburg891 ranked
- Home builders in Gaithersburg813 ranked
- Demolition contractors in Gaithersburg90 ranked
- All contractors in Gaithersburg