92/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 107 Google reviews, open 24/7.
- 4.9★ from 107 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2811 Castro Valley Blvd #111, Castro Valley, CA 94546
Best General Contractors in Castro Valley, CA (2026)
1,181 general contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Castro Valley: Ocean Remodel, CR Score 92/100; 4.9★ from 107 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): R & S Erection North Peninsula, posts 24/7 hours; ranked #3 of 1,181.
- 2
Most-reviewed: Closets by Design - Northern California, 998 Google reviews at 4.8★, the most of 1,181 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
1,181 Castro Valley general contractors are ranked here by CR Score, from 8 published factors. 67 are open 24/7, 437 open Saturdays and 234 open Sundays, based on posted hours. The median Google rating is 5.0★ across 1,181 rated businesses.
Top 10 general contractors in Castro Valley at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Ocean Remodel | 92 | 4.9★ (107) | Castro Valley | 24/7 | Overall |
| 2 | Closets by Design - Northern California | 91 | 4.8★ (998) | Hayward, 3 mi away | Sat · Sun · Evenings | Most reviews |
| 3 | R & S Erection North Peninsula | 89 | 5.0★ (233) | South San Francisco, 18 mi away | 24/7 | Emergencies |
| 4 | Closet World - Northern California | 87 | 4.4★ (775) | Hayward, 3 mi away | Sat · Sun · Evenings | — |
| 5 | Method Remodeling General Contractor | 87 | 5.0★ (69) | Burlingame, 16 mi away | 24/7 | — |
| 6 | Ehret Co Plumbing & Heating | 87 | 4.6★ (52) | Oakland, 7 mi away | 24/7 | — |
| 7 | Lockworks Unlimited | 86 | 4.7★ (144) | Redwood City, 17 mi away | 24/7 | — |
| 8 | Primework Construction | 86 | 5.0★ (111) | San Jose, 23 mi away | 24/7 | — |
| 9 | TRUSTED HEATING, COOLING & CONSTRUCTION | 86 | 4.8★ (21) | Union City, 8 mi away | 24/7 | — |
| 10 | Sky Automatic Gates | 85 | 4.9★ (22) | Pleasanton, 10 mi away | 24/7 | — |
The 1,181 best general contractors in Castro Valley, 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 Hayward, 3 mi away
91/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 998 Google reviews, the most Google reviews on this list (998).
- 4.8★ from 998 Google reviews
- Hours
- Mon–Fri 6:30 AM–9 PM · Sat–Sun 9 AM–4 PM
- Address
- 20470 Corsair Blvd, Hayward, CA 94545
Based in South San Francisco, 18 mi away
89/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 233 Google reviews, open 24/7.
- 5.0★ from 233 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 133 S Linden Ave, South San Francisco, CA 94080
Based in Hayward, 3 mi away
87/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.4★ from 775 Google reviews, listed on Google as “General contractor”.
- 4.4★ from 775 Google reviews
- Hours
- Mon–Fri 6:30 AM–9 PM · Sat 8 AM–6 PM · Sun 9 AM–4 PM
- Address
- 20466 Corsair Blvd, Hayward, CA 94545
Based in Burlingame, 16 mi away
87/100CR ScoreRanked #5 because of its Google rating and availability: 5.0★ from 69 Google reviews, open 24/7.
- 5.0★ from 69 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 533 Airport Blvd. #400, Burlingame, CA 94010
Based in Oakland, 7 mi away
87/100CR ScoreRanked #6 because of its Google rating and availability: 4.6★ from 52 Google reviews, open 24/7.
- 4.6★ from 52 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 887 71st Ave, Oakland, CA 94621
Based in Redwood City, 17 mi away
86/100CR ScoreRanked #7 because of its Google rating and availability: 4.7★ from 144 Google reviews, open 24/7.
- 4.7★ from 144 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2671 El Camino Real, Redwood City, CA 94061
Based in San Jose, 23 mi away
86/100CR ScoreRanked #8 because of its Google rating and availability: 5.0★ from 111 Google reviews, open 24/7.
- 5.0★ from 111 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2375 Zanker Rd #245, San Jose, CA 95131
Based in Union City, 8 mi away
86/100CR ScoreRanked #9 because of its Google rating and availability: 4.8★ from 21 Google reviews, open 24/7.
- 4.8★ from 21 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4236 Solar Cir, Union City, CA 94587
Based in Pleasanton, 10 mi away
85/100CR ScoreRanked #10 because of its Google rating and availability: 4.9★ from 22 Google reviews, open 24/7.
- 4.9★ from 22 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4900 Hopyard Rd Suit 100, Pleasanton, CA 94588
Based in San Francisco, 12 mi away
85/100CR ScoreRanked #11 because of its Google rating and availability: 5.0★ from 23 Google reviews, open 24/7.
- 5.0★ from 23 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Danville, 12 mi away
85/100CR ScoreRanked #12 because of its Google rating and availability: 5.0★ from 23 Google reviews, open 24/7.
- 5.0★ from 23 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Hayward, 1 mi away
85/100CR ScoreRanked #13 because of its Google rating and availability: 5.0★ from 6 Google reviews, open 24/7.
- 5.0★ from 6 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1353 B St, Hayward, CA 94541
Based in Concord, 14 mi away
85/100CR ScoreRanked #14 because of its Google rating and availability: 5.0★ from 27 Google reviews, open 24/7.
- 5.0★ from 27 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Fremont, 13 mi away
85/100CR ScoreRanked #15 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
- Address
- 3948 Clough Ave, Fremont, CA 94538
Based in Walnut Creek, 14 mi away
85/100CR ScoreRanked #16 because of its Google rating and availability: 5.0★ from 24 Google reviews, open 24/7.
- 5.0★ from 24 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1661 Botelho Dr # 293, Walnut Creek, CA 94596
Based in San Ramon, 9 mi away
85/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.8★ from 85 Google reviews, listed on Google as “Construction company”.
- 4.8★ from 85 Google reviews
- Hours
- Mon–Sun 7 AM–8 PM
- Address
- 2010 Crow Canyon Pl Suite 100, San Ramon, CA 94583
Based in Lathrop, 22 mi away
85/100CR ScoreRanked #18 because of its Google rating and availability: 5.0★ from 58 Google reviews, open 24/7.
- 5.0★ from 58 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Castro Valley
84/100CR ScoreRanked #19 because of its Google rating and availability: 5.0★ from 3 Google reviews, open 24/7.
- 5.0★ from 3 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 4450 Paradise Knolls, Castro Valley, CA 94546
#20 Sima
Based in San Leandro, 6 mi away
84/100CR ScoreRanked #20 because of its Google rating and availability: 4.3★ from 11 Google reviews, open 24/7.
- 4.3★ from 11 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 130 Doolittle Dr #15, San Leandro, CA 94577
Based in Mountain View, 22 mi away
84/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 151 Google reviews, listed on Google as “General contractor”.
- 5.0★ from 151 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 707 Continental Cir, Mountain View, CA 94040
Based in Hercules, 14 mi away
84/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 65 Google reviews, listed on Google as “Construction company”.
- 5.0★ from 65 Google reviews
- Hours
- Mon–Fri 7 AM–8:30 PM · Sat–Sun 9 AM–5 PM
Based in San Jose, 24 mi away
84/100CR ScoreRanked #23 because of its Google rating and availability: 4.9★ from 56 Google reviews, open 24/7.
- 4.9★ from 56 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1729 N First St, San Jose, CA 95112
Based in Castro Valley
84/100CR ScoreRanked #24 because of its Google rating and availability: 3.0★ from 6 Google reviews, open 24/7.
- 3.0★ from 6 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 21634 Redwood Rd, Castro Valley, CA 94546
Based in Hayward, 3 mi away
84/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.7★ from 50 Google reviews, listed on Google as “Construction company”.
- 4.7★ from 50 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
- Address
- 109 Jackson St, Hayward, CA 94544
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 1,181 ranked general contractors here; the rest are on their profiles.
Also serving Castro Valley
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 |
|---|---|---|
| AA Quality Construction | 5.0★ (16) | In Castro Valley |
| Absolute Plumbing | 4.2★ (5) | In Castro Valley |
| Alameda Engineering | 4.6★ (11) | In Castro Valley |
| Better Home Construction Services, Inc. | 5.0★ (12) | In Castro Valley |
| Brian Beck Construction | 5.0★ (1) | In Castro Valley |
| Decorative Concrete Restoration | 4.2★ (5) | In Castro Valley |
| GAXL Construction & Plumbing | 5.0★ (13) | In Castro Valley |
| H & H Construction | 5.0★ (2) | In Castro Valley |
| Handyman in Hayward | 5.0★ (6) | In Castro Valley |
| Integrity Construction and Flooring | 5.0★ (3) | In Castro Valley |
| Jesus Morales Construction & Son LLC | 5.0★ (3) | In Castro Valley |
| KB Home The Chapter | 5.0★ (3) | In Castro Valley |
| Montgomery Builders | 4.0★ (2) | In Castro Valley |
| Rayco Door and Window | 4.2★ (5) | In Castro Valley |
| Roof-Life Construction | 5.0★ (7) | In Castro Valley |
| T L Oliver Construction | 5.0★ (1) | In Castro Valley |
| Vanderbilt Family Builders | 2.0★ (1) | In Castro Valley |
| VC Electric | 4.5★ (8) | In Castro Valley |
| XOtek Windows, Inc. (Lic# 700664) | 3.2★ (5) | In Castro Valley |
| ZI BUILDER INC | 5.0★ (2) | In Castro Valley |
How much do general contractors cost in Castro Valley?
Typical prices in USD, adjusted for California with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Kitchen remodel | $15,240 | $28,190 | $43,470 | Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.04 Pacific factor (2025 Cost vs. Value Report) | October 2026 |
| Bathroom remodel | $7,050 | $12,880 | $18,720 | Per bathroom: typical range of customer-reported remodels. US national range × 1.06 Pacific factor (2025 Cost vs. Value Report) | October 2026 |
How to check a general contractor's license in California
In California, Contractors State License Board (CSLB) licenses B General Building contractor license (B-2 for residential remodeling).
Jobs of $1,000 or more in labor and materials (from January 1, 2025).
- Search the business name or license number on the Contractors State License Board (CSLB) license lookup.
- 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 Castro Valley general contractors
We scored 1,181 Castro Valley 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 Castro Valley 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 Castro Valley: frequently asked questions
Who is the best general contractor in Castro Valley?
By CR Score, the highest-ranked general contractor in Castro Valley, CA is Ocean Remodel with a CR Score of 92/100. It has 4.9★ from 107 Google reviews. It is open 24/7. Closets by Design - Northern California (#2) and R & S Erection North Peninsula (#3) follow. We ranked 1,181 general contractors on 8 factors, last updated October 22, 2026.
How many general contractors are there in Castro Valley?
ContractorsRanked ranks 1,181 general contractors serving Castro Valley, CA. 3 of them are based in Castro Valley; 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 Castro Valley are open 24/7?
67 ranked general contractors in Castro Valley post 24/7 hours. The highest-ranked are Ocean Remodel (#1), R & S Erection North Peninsula (#3) and Method Remodeling General Contractor (#5). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which general contractors in Castro Valley work on weekends?
437 of 1,181 ranked general contractors post Saturday hours and 234 post Sunday hours. The highest-ranked open Saturdays are Ocean Remodel (#1), Closets by Design - Northern California (#2) and R & S Erection North Peninsula (#3). Posted hours are office hours; crews may book weekend jobs separately.
How do I check a general contractor's license in California?
In California, Contractors State License Board (CSLB) handles licensing and covers B General Building contractor license (B-2 for residential remodeling). Search the business or license number at https://www.cslb.ca.gov/OnlineServices/CheckLicenseII/CheckLicense.aspx. Jobs of $1,000 or more in labor and materials (from January 1, 2025).
How much does kitchen remodel cost in Castro Valley?
Kitchen remodel typically costs $15,240 to $43,470, with $28,190 typical (Per project: typical range of customer-reported remodels (about $75 to $250 per sq ft). US national range × 1.04 Pacific factor (2025 Cost vs. Value Report)). The range is adjusted for California. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Castro Valley general contractors have?
The median Google rating among 1,181 rated general contractors in Castro Valley is 5.0★, with a median of 7 reviews. Closets by Design - Northern California has the most, 998 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 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 Castro Valley
- October 2026: CR Scores recalculated for 1,181 general contractors serving Castro Valley.
- October 2026: 11 duplicate listings merged.
More general contractors and Castro Valley pages
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Other trades in Castro Valley
- Roofers in Castro Valley772 ranked
- Plumbers in Castro Valley821 ranked
- Electricians in Castro Valley592 ranked
- HVAC contractors in Castro Valley673 ranked
- Painters in Castro Valley209 ranked
- Landscapers in Castro Valley158 ranked
- Handymen in Castro Valley107 ranked
- Kitchen remodelers in Castro Valley632 ranked
- Bathroom remodelers in Castro Valley584 ranked
- Flooring contractors in Castro Valley382 ranked
- Tile installers in Castro Valley61 ranked
- Drywall contractors in Castro Valley27 ranked
- Concrete contractors in Castro Valley308 ranked
- Fence contractors in Castro Valley145 ranked
- Deck builders in Castro Valley172 ranked
- Siding contractors in Castro Valley100 ranked
- Window installers in Castro Valley319 ranked
- Gutter installers in Castro Valley209 ranked
- Insulation contractors in Castro Valley138 ranked
- Solar installers in Castro Valley303 ranked
- Garage door repair companies in Castro Valley291 ranked
- Foundation repair companies in Castro Valley129 ranked
- Tree services in Castro Valley287 ranked
- Masonry contractors in Castro Valley148 ranked
- Water damage restoration companies in Castro Valley405 ranked
- Home builders in Castro Valley497 ranked
- Demolition contractors in Castro Valley110 ranked
- All contractors in Castro Valley