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Best Roofers in Diamond Bar, CA (2026)

1,918 roofers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Diamond Bar: Green Ladder Roofing and Waterproofing, CR Score 91/100; 5.0★ from 258 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): Specialist Roofing & Repair, posts 24/7 hours; ranked #2 of 1,918.

  3. 24

    Most-reviewed: Home Renew 360 Roofing I Construction I Energy, 705 Google reviews at 4.8★, the most of 1,918 ranked; ranked #24.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

1,918 Diamond Bar roofers are ranked here by CR Score, from 8 published factors. 463 are open 24/7, 1,320 open Saturdays and 1,005 open Sundays, based on posted hours. The median Google rating is 5.0★ across 1,918 rated businesses.

Top 10 roofers in Diamond Bar at a glance

Top 10 roofers in Diamond Bar at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Green Ladder Roofing and Waterproofing915.0★ (258)Pasadena, 20 mi away24/7Overall
2Specialist Roofing & Repair904.9★ (247)Orange, 16 mi away24/7Emergencies
3All In Roofing905.0★ (213)Los Angeles, 22 mi away24/7—
4Woody's Roofing894.9★ (176)South Pasadena, 20 mi away24/7—
5Roofing and More, LLC894.8★ (168)Jurupa Valley, 17 mi away24/7—
6Cali Roofing Solutions895.0★ (87)Corona, 18 mi away24/7—
7Hercules Roofing885.0★ (116)Huntington Beach, 24 mi away24/7—
8Above It All Roofing884.8★ (119)Irvine, 19 mi away24/7—
9Brilliant Roofing884.9★ (106)El Monte, 14 mi away24/7—
10NEMA Roofing875.0★ (58)Downey, 20 mi away24/7—

The 1,918 best roofers in Diamond Bar, 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.

  3. #3 All In Roofing

    Based in Los Angeles, 22 mi away

    90/100CR Score

    Ranked #3 because of its Google rating and availability: 5.0★ from 213 Google reviews, open 24/7.

    • 5.0★ from 213 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    800 S Eastman Ave, Los Angeles, CA 90023
    View profile for All In Roofing(323) 287-2407

  4. #4 Woody's Roofing

    Based in South Pasadena, 20 mi away

    89/100CR Score

    Ranked #4 because of its Google rating and availability: 4.9★ from 176 Google reviews, open 24/7.

    • 4.9★ from 176 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1415 Monterey Rd #110, South Pasadena, CA 91030
    View profile for Woody's Roofing(818) 583-0850

  7. #7 Hercules Roofing

    Based in Huntington Beach, 24 mi away

    88/100CR Score

    Ranked #7 because of its Google rating and availability: 5.0★ from 116 Google reviews, open 24/7.

    • 5.0★ from 116 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    7755 Center Avenue suite 1100, Unit B, Huntington Beach, CA 92647
    View profile for Hercules Roofing(949) 301-8984

  9. #9 Brilliant Roofing

    Based in El Monte, 14 mi away

    88/100CR Score

    Ranked #9 because of its Google rating and availability: 4.9★ from 106 Google reviews, open 24/7.

    • 4.9★ from 106 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4439 Rowland Ave #1250, El Monte, CA 91731
    View profile for Brilliant Roofing(626) 604-0714

  10. #10 NEMA Roofing

    Based in Downey, 20 mi away

    87/100CR Score

    Ranked #10 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
    Address
    8211 Firestone Blvd, Downey, CA 90241
    View profile for NEMA Roofing(866) 214-0006

  11. #11 Ontario Roofing

    Based in Ontario, 15 mi away

    87/100CR Score

    Ranked #11 because of its Google rating and availability: 4.9★ from 48 Google reviews, open 24/7.

    • 4.9★ from 48 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    4335 E Lowell St STE G, Ontario, CA 91761
    View profile for Ontario Roofing(909) 330-4661

Roofers 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 1,918 ranked roofers here; the rest are on their profiles.

roofers in Diamond Bar, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Elevate Arc Roofing864.9★ (34)16 mi
27Custom Roof Company864.7★ (17)5 mi
28Garden Grove Roof Pros865.0★ (42)21 mi
29Fontana Roofing Experts Pro865.0★ (36)19 mi
30Hexagon Roofing Inc. - Pasadena Roofers864.9★ (49)21 mi
31Corona Roofing & Siding864.8★ (34)15 mi
32Granger Roofing865.0★ (25)15 mi
33All Seasons Roofing Improvement864.8★ (74)16 mi
34The Affordable Roofers865.0★ (70)9 mi
35Tylzen Spoke Roofing864.8★ (35)16 mi
36Venice Beach Roofing864.7★ (67)20 mi
37Alas & Bravo Roofing Company864.9★ (56)25 mi
38Montebello Roofing Construction864.7★ (49)18 mi
39Shingle Guard Roofs865.0★ (29)19 mi
40ND Roofing Inc865.0★ (10)6 mi
41Kaliber Roofing Inc864.8★ (82)7 mi
42One Stop Roofing865.0★ (152)22 mi
43Horizon Roofing864.8★ (59)24 mi
44Specialist Roofing & Repair864.8★ (90)29 mi
45Urban Roofing865.0★ (41)25 mi
46Navarro Brothers Roofing & Remodeling864.8★ (73)18 mi
471st Roofing Contractors Fountain Valley CA865.0★ (38)24 mi
48C&S Construction Enterprises865.0★ (21)17 mi
49Wright Brothers Roofing & Construction864.8★ (88)29 mi
50Martin Roofing Services, Inc.865.0★ (20)8 mi

Also serving Diamond Bar

20 more roofers within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.

Unranked roofers serving Diamond Bar
BusinessGoogle ratingDistance
Affordable Roofing Solutions, Inc4.8★ (33)10 mi
American Highland Roofing4.7★ (57)17 mi
Apex Roofing Co5.0★ (2)4 mi
Best Quality4.0★ (1)In Diamond Bar
Claremont Intuition Free Evaluation Roof Repair5.0★ (2)7 mi
Cortez Roofing3.5★ (2)2 mi
Duralast Roofing5.0★ (2)6 mi
Economy roofing3.0★ (2)3 mi
Empire Energy Solutions5.0★ (1)In Diamond Bar
Everlast Roofing Experts5.0★ (1)In Diamond Bar
Fixology Pro Roofers4.7★ (14)8 mi
Francisco's Roofing Inc.4.9★ (92)23 mi
JE HOME CONSTRUCTION5.0★ (2)7 mi
Luans roofing Inc5.0★ (2)4 mi
Rooter Shooter Jetting5.0★ (35)In Diamond Bar
S Coast Roofing ConstructionIn Diamond Bar
SG Roofing LLC5.0★ (44)23 mi
Titan Roofing Inc5.0★ (2)7 mi
WBJ Roofing & Consulting LLC.In Diamond Bar
Wm.T.Nelson Roofing and construction3.0★ (2)7 mi

How much do roofers cost in Diamond Bar?

Typical prices in USD: adjusted for California where a published index exists, national otherwise. Each row names its basis.

How much do roofers cost in Diamond Bar?
JobLowTypicalHighBasisChecked
Roof replacement$8,560$11,420$15,990Per project: asphalt shingles on a 1,700 sq ft home (about 2,000 sq ft of roof). US national range × 1.14 Pacific factor (2025 Cost vs. Value Report)October 2026
Roof repair$395$1,174$1,968Per repair: typical range of customer-reported jobs. US national rangeOctober 2026

How to check a roofer's license in California

In California, Contractors State License Board (CSLB) licenses C-39 Roofing contractor license.

Jobs of $1,000 or more in labor and materials (from January 1, 2025).

  1. Search the business name or license number on the Contractors State License Board (CSLB) license lookup.
  2. Check that the status is active and the name matches the contract or truck.
  3. 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

When to hire a roofer in California

Roofers are busiest from late spring to early fall, so booking in winter usually means shorter waits. After a big storm, get more than one quote and check the license or registration before signing.

How we ranked Diamond Bar roofers

We scored 1,918 Diamond Bar roofers 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Diamond Bar data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Roofers in Diamond Bar: frequently asked questions

Who is the best roofer in Diamond Bar?

By CR Score, the highest-ranked roofer in Diamond Bar, CA is Green Ladder Roofing and Waterproofing with a CR Score of 91/100. It has 5.0★ from 258 Google reviews. It is open 24/7. Specialist Roofing & Repair (#2) and All In Roofing (#3) follow. We ranked 1,918 roofers on 8 factors, last updated October 22, 2026.

How many roofers are there in Diamond Bar?

ContractorsRanked ranks 1,918 roofers serving Diamond Bar, CA. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.

Which roofers in Diamond Bar are open 24/7?

463 ranked roofers in Diamond Bar post 24/7 hours. The highest-ranked are Green Ladder Roofing and Waterproofing (#1), Specialist Roofing & Repair (#2) and All In Roofing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which roofers in Diamond Bar work on weekends?

1,320 of 1,918 ranked roofers post Saturday hours and 1,005 post Sunday hours. The highest-ranked open Saturdays are Green Ladder Roofing and Waterproofing (#1), Specialist Roofing & Repair (#2) and All In Roofing (#3). Posted hours are office hours; crews may book weekend jobs separately.

How do I check a roofer's license in California?

In California, Contractors State License Board (CSLB) handles licensing and covers C-39 Roofing contractor license. 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 roof replacement cost in Diamond Bar?

Roof replacement typically costs $8,560 to $15,990, with $11,420 typical (Per project: asphalt shingles on a 1,700 sq ft home (about 2,000 sq ft of roof). US national range × 1.14 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 Diamond Bar roofers have?

The median Google rating among 1,918 rated roofers in Diamond Bar is 5.0★, with a median of 12 reviews. Home Renew 360 Roofing I Construction I Energy has the most, 705 reviews, and ranks #24. We adjust ratings for review count, so a few five-star reviews cannot top the list.

When is the best time to hire a roofer in Diamond Bar?

Roofers are busiest from late spring to early fall, so booking in winter usually means shorter waits. After a big storm, get more than one quote and check the license or registration before signing.

Update log for Diamond Bar

  1. October 2026: CR Scores recalculated for 1,918 roofers serving Diamond Bar.
  2. October 2026: 15 duplicate listings merged.

More roofers and Diamond Bar pages

Other trades in Diamond Bar