Print Share Add feedback

About this company

View all

J&M Keystone, Inc.

J&M Keystone, Inc. was established in San Diego almost 40 years ago. With over 100 years of combined experience in emergency water damage restoration, reconstruction, and other specialty cleaning, J&M is a full service restoration contractor. We hold a California contractor’s license with B, C15 and C54 classifications and are equipped to handle all types of property damage such as Residential, Medical and Commercial Facilities.

GuildQuality Member
Since 2020
Feedback Milestone
7-Year Anniversary
2024 - See more

General repairs (350)

Water damage & mold remediation (333)

Fire damage restoration (306)

Historic restoration (304)


View all
All project locations are approximate


View all
Showing 1-4 of 4


Most helpful reviews & comments

What is this?

What is this?

We display two types of written homeowner feedback on GuildQuality member profile pages: Comments and Reviews.


In response to our customer satisfaction surveys, homeowners share lots of comments about construction quality, communication, or any other question asked in the survey. Guildmembers can selectively publish these comments here on their profile page.


Reviews are different than comments. These are star ratings that homeowners ask us to publish, and they come with a written description of the type of experience they had working with their contractor. We publish all of the reviews we receive: positive and negative alike.

Learn more about reviews and comments.
View all
  • GuildQuality
  • Alacrity Services Contractor
  • BBB Accredited Business
  • Community Associations Institute
  • Crawford Contractor Connection

More about J&M Keystone, Inc.

As a GuildQuality Guildmember, J&M Keystone, Inc. relies on our customer surveying to help them deliver an exceptional customer experience.

We have surveyed customers on behalf of J&M Keystone, Inc. in San Diego, CA; Chula Vista, CA; El Cajon, CA; Oceanside, CA; Escondido, CA; Spring Valley, CA; Carlsbad, CA; La Mesa, CA; Santee, CA; Poway, CA; and 67 other cities in California, Washington, New Jersey, Arizona, Florida, and 7 other states.

J&M Keystone, Inc. surveys all of their customers shortly after the completion of work, and their feedback appears in the summary on this page.

If you are a J&M Keystone, Inc. customer, and if J&M Keystone, Inc. completed work for you after January of 2020 but you haven't yet received a survey, please let us know.

Flag this review

Please give us a little more information:

The review contains misspellings or improper grammar.

The review contains objectionable language.

Something else:

Thanks for letting us know that this comment may be inappropriate. A member of our team will review the comment.