157 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Portsmouth: Diamond Ridge Construction LLC, CR Score 62/100; 4.9★ from 31 Google reviews; open 24/7.
Best for emergencies (open 24/7): BLB Design / Build, posts 24/7 hours; ranked #5 of 157.
Most-reviewed: Eric's Maintenance & Mobile Home Services, 102 Google reviews at 4.6★, the most of 157 ranked; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
157 Portsmouth general contractors are ranked here by CR Score, from ten published factors. 11 are open 24/7, 61 open Saturdays and 20 open Sundays, based on posted hours. The median Google rating is 5.0★ across 157 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Diamond Ridge Construction LLC | 62 | 4.9★ (31) | Amesbury, 7 mi away | 24/7 | Overall |
| 2 | Shoreline Hardscapes & Construction, LLC | 61 | 4.7★ (26) | Newburyport, 2 mi away | Sat · Sun | — |
| 3 | Otter Creek Homes | 60 | 5.0★ (31) | Exeter, 6 mi away | — | — |
| 4 | ACE Garage Door Repair | 60 | 5.0★ (52) | Exeter, 11 mi away | Sat · Evenings | — |
| 5 | BLB Design / Build | 59 | 5.0★ (23) | Amesbury, 17 mi away | 24/7 | Emergencies |
| 6 | Kev and Sons Construction | 59 | 4.8★ (41) | Sanford, 24 mi away | 24/7 | — |
| 7 | Northwoods property services, LLC | 59 | 4.9★ (38) | Sanford, 24 mi away | 24/7 | — |
| 8 | Royce Works, LLC | 59 | 5.0★ (28) | Barrington, 15 mi away | Sat · Sun · Evenings | — |
| 9 | River Birch Builders | 59 | 5.0★ (26) | Portsmouth | — | — |
| 10 | Eric's Maintenance & Mobile Home Services | 59 | 4.6★ (102) | Pembroke, 12 mi away | — | Most reviews |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 31 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Newburyport, 2 mi away
Ranked #2 because of its Google rating and trade focus: 4.7★ from 26 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Exeter, 6 mi away
Ranked #3 because of its Google rating and trade focus: 5.0★ from 31 Google reviews, listed on Google as “General contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Exeter, 11 mi away
Ranked #4 because of its Google rating and trade focus: 5.0★ from 52 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Amesbury, 17 mi away
Ranked #5 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sanford, 24 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 41 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sanford, 24 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 38 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Barrington, 15 mi away
Ranked #8 because of its Google rating and trade focus: 5.0★ from 28 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth
Ranked #9 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Pembroke, 12 mi away
Ranked #10 because of its Google rating and review volume: 4.6★ from 102 Google reviews, the most in Portsmouth.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Exeter, 5 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 34 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 5 mi away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “General contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Chelmsford, 14 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Construction company”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Rochester, 18 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 4 mi away
Ranked #15 because of its Google rating and trade focus: 3.4★ from 5 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 4 mi away
Ranked #16 because of its Google rating and trade focus: 4.0★ from 4 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 5 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 11 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Portsmouth
Ranked #18 because of its Google rating and trade focus: 4.5★ from 16 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Exeter, 5 mi away
Ranked #19 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Chester, 24 mi away
Ranked #20 because of its Google rating and trade focus: 4.7★ from 68 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lebanon, 18 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 15 Google reviews, listed on Google as “Contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 8 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 20 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in South Berwick, 11 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 28 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 11 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Eliot, 5 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 16 Google reviews, listed on Google as “Construction company”.
Based on 8 of 10 factors; credentials and recency not yet collected.
#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 157 ranked general contractors here; the rest are on their profiles.
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 |
|---|---|---|
| Asturian Group, Inc. | 5.0★ (1) | In Portsmouth |
| Berkeley Building Company | In Portsmouth | |
| Bridgeside Building company | 5.0★ (1) | In Portsmouth |
| Careno Construction Co | 5.0★ (2) | In Portsmouth |
| Chris-Co Construction Services Inc. And Philbrick Septic Tank Services | 4.6★ (11) | In Portsmouth |
| Edmunds General Contracting | 5.0★ (1) | In Portsmouth |
| JDL Building & Remodeling | 5.0★ (1) | In Portsmouth |
| Libby Contracting & Electric LLC | 5.0★ (1) | In Portsmouth |
| Malthouse Construction | 5.0★ (2) | In Portsmouth |
| McGrath & Company LLC | In Portsmouth | |
| Portsmouth Builders LLC | In Portsmouth | |
| Robinson's Landscape Construction, LLC | 4.5★ (17) | In Portsmouth |
| Rockland Marine Corp | In Portsmouth | |
| Seacoast NH Painters | 5.0★ (1) | In Portsmouth |
| Smithfield Construction Inc | 5.0★ (1) | In Portsmouth |
| Star Island Builders | 5.0★ (1) | In Portsmouth |
| Susan Durling Designs | 5.0★ (3) | In Portsmouth |
| Terravecchia Building-Restoration | In Portsmouth | |
| Thermidyne HVACR | In Portsmouth | |
| Three Phase Line Construction, Inc. | 2.0★ (1) | In Portsmouth |
Typical prices in USD, adjusted for New Hampshire with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Kitchen remodel | $14,840 | $27,440 | $42,320 | Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.02 New England factor (2025 Cost vs. Value Report) | October 2026 |
| Bathroom remodel | $7,010 | $12,810 | $18,620 | Per bathroom: typical range of customer-reported remodels. US national range × 1.05 New England factor (2025 Cost vs. Value Report) | October 2026 |
We scored 157 Portsmouth 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 Portsmouth 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 |