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Emergency Tree Services in Diamond Bar, CA (2026)

Top 50 of 327 tree services, in emergency orderUpdated 0 paid placements in this rankingHow we rank

25 of the 50 tree services on this list post 24/7 hours. 24/7 businesses come first, then same-day, each ranked by CR Score with availability weighted higher.

Tree on a power line: stay 30 feet away and call your utility. Tree on the house: leave the affected rooms.

The short answer

  1. 1

    #1 for emergency tree service in Diamond Bar: Environmental Green Tree Care/ Killelea Landscape, open 24/7.

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

Top emergency tree services in Diamond Bar at a glance

Top emergency tree services in Diamond Bar at a glance
RankBusinessCR ScoreGoogle ratingBased inHours
1Environmental Green Tree Care/ Killelea Landscape645.0★ (267)Anaheim, 15 mi away24/7
2POWER TREE SERVICE625.0★ (30)Adelanto, 2 mi away24/7
3Melendez Tree Service615.0★ (85)Corona, 14 mi away24/7
4D&N Tree Care Inc614.9★ (52)Ontario, 11 mi away24/7
5Premier Tree Experts614.8★ (79)Orange, 14 mi away24/7
6Reg's Tree Service615.0★ (217)Fountain Valley, 25 mi away24/7
7Favor Tree Care615.0★ (69)Anaheim, 15 mi away24/7
8Specialty Tree Care Inc.604.9★ (44)Alhambra, 12 mi away24/7
9Zuniga's Tree Service605.0★ (54)Chino, 15 mi away24/7
10Zamora Tree Services605.0★ (147)Anaheim, 24 mi away24/7

Call an emergency tree service in Diamond Bar now

24/7 hours mean the business says its phone is answered around the clock. Arrival time depends on where the crew is. Ask for an arrival window when you call.

The 50 emergency tree services in Diamond Bar, ranked

24/7 first, then same-day service, then the rest. Each group is in CR Score order on emergency weights. The full ranking of all 327 is on the tree services page.

Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.

  4. #4 D&N Tree Care Inc

    Based in Ontario, 11 mi away

    61/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 52 Google reviews, listed on Google as “Tree service”.

    • 4.9★ from 52 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1448 E Elma Ct, Ontario, CA 91764
    View profile for D&N Tree Care Inc(909) 678-5193

  7. #7 Favor Tree Care

    Based in Anaheim, 15 mi away

    61/100CR Score

    Ranked #7 because of its Google rating and trade focus: 5.0★ from 69 Google reviews, listed on Google as “Tree service”.

    • 5.0★ from 69 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    510 N Wedgewood Dr, Anaheim, CA 92801
    View profile for Favor Tree Care(714) 395-9495

  14. #14 Alex Tree Service

    Based in Azusa, 9 mi away

    59/100CR Score

    Ranked #14 because of its Google rating and trade focus: 5.0★ from 21 Google reviews, listed on Google as “Tree service”.

    • 5.0★ from 21 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    547 N Barbara Ave, Azusa, CA 91702
    View profile for Alex Tree Service(626) 804-4491

  20. #20 King's Tree Service

    Based in Pomona, 4 mi away

    59/100CR Score

    Ranked #20 because of its Google rating and trade focus: 4.9★ from 11 Google reviews, listed on Google as “Tree service”.

    • 4.9★ from 11 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    2232 Kathryn Ave, Pomona, CA 91766
    View profile for King's Tree Service(626) 221-6471

  23. #23 Paez Tree Service

    Based in Anaheim, 16 mi away

    59/100CR Score

    Ranked #23 because of its Google rating and trade focus: 4.7★ from 44 Google reviews, listed on Google as “Tree service”.

    • 4.7★ from 44 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    1705 S State College Blvd, Anaheim, CA 92806
    View profile for Paez Tree Service(714) 926-9413

Top 50 of 327 tree services by emergency score

#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile.

tree services in Diamond Bar, ranks 26 to 50
RankBusinessCR ScoreGoogle ratingDistance
26Think Green Tree Care Inc.584.9★ (64)7 mi
27Tree Service of Rancho Cucamonga585.0★ (21)14 mi
28CHT Chino Hills Tree Services585.0★ (9)8 mi
29JC Tree Care and Landscape584.8★ (49)20 mi
30Millen Tree Service585.0★ (24)16 mi
31So Cal Tree Trimming Inc.585.0★ (25)16 mi
32George's Tree Services584.9★ (39)19 mi
33GNZ Tree Experts INC584.8★ (24)15 mi
34Lorenzo's Landscaping And Tree Services in Upland Ca585.0★ (11)10 mi
35Unique Tree service584.4★ (25)14 mi
36Alex's Tree Service584.2★ (5)3 mi
37Jamescapes584.9★ (9)9 mi
38A & S Tree Service585.0★ (23)17 mi
39Discount Tree Care Arborist, Inc.584.1★ (130)23 mi
40Forever Green S&G Tree Service575.0★ (34)22 mi
41Shades of Green Tree Service574.8★ (15)14 mi
42MTZ Tree Service574.4★ (7)8 mi
43Atilanos Junk Removal & Tree Trimming575.0★ (6)10 mi
44A1 TREE CORP574.4★ (34)6 mi
45Elite Tree Care573.9★ (7)10 mi
46New Generation Tree Care574.9★ (18)19 mi
47Advance Tree Service574.2★ (5)9 mi
48Everest Tree Service564.8★ (18)20 mi
49Paez Tree Care562.3★ (3)5 mi
50Exclusive Tree Services564.4★ (24)21 mi

How we ranked emergency tree services in Diamond Bar

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 tree services are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

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 from
Reputation15%Google star rating, adjusted for how many reviews back it
Credentials15%Active state license, bond and workers’ comp on file
Review volume10%Number of Google reviews, compared with the most-reviewed business on the list
Recency5%Share of reviews from the last 12 months
Availability15%Weekly open hours, Saturday, Sunday, 24/7 or same-day
Trade focus10%How clearly the business does this trade (its Google category and name)
Proximity5%Based in the city scores highest, less the farther away it is
Claimed profile10%The business has claimed its ContractorsRanked profile (free or paid earn the same)
Partnered5%The business links to ContractorsRanked from its own website with our badge, checked periodically
ContractorsRanked reviews10%Verified customer reviews collected by ContractorsRanked: their rating and how many there are

Emergency tree services in Diamond Bar: questions

Which tree services in Diamond Bar are open 24/7?

25 on this list post 24/7 hours, including Environmental Green Tree Care/ Killelea Landscape, POWER TREE SERVICE, Melendez Tree Service, D&N Tree Care Inc and Premier Tree Experts.

Who is ranked #1 for emergency tree service in Diamond Bar, CA?

Environmental Green Tree Care/ Killelea Landscape is #1, with a CR Score of 64 out of 100 on emergency weights.

How are emergency tree services in Diamond Bar ranked?

Emergency lists move 10 points of the CR Score from reputation to availability: 15% and 15%. Availability credits 24/7 hours, same-day service, weekend hours and weekly open hours. 24/7 tree services are listed first, then same-day, then the rest; ranks follow that order. Paid placement never changes a rank.

What should I do before the tree service arrives?

Tree on a power line: stay 30 feet away and call your utility. Tree on the house: leave the affected rooms.

How many emergency tree services here list a phone number?

25 of the 25 businesses ranked in full list a phone number. Tap Call to dial it.

Update log for Diamond Bar

  1. October 2026: CR Scores recalculated for 327 tree services serving Diamond Bar.
  2. October 2026: 8 duplicate listings merged.

More emergency and tree service pages