4.6 
1.1k+ *The Angi rating for Nest Installation companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Nest Installation needs.
*The HomeAdvisor rating for Nest Installation companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Nest Installation needs.
Last update on September 29, 2025
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1997
Free estimates
Emergency services offered
"Victor showed up on time, and was pleasant. He removed the old fan and then assembled and installed the new fan. Even overcoming a problem with a part supplied being the wrong size. Great job."
+33
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1978
Free estimates
Emergency services offered
"Christian from McLay Services showed up within the agreed time frame to install a new kitchen faucet and fix a leak in one of my bathtubs. He did a great job. Faucet was installed within 20 to 25 minutes. He also fixed a leak in my bathtub in the Master bathroom and installed new a new drain and spout. He was neat and clean in his work and answered any questions that I had. Very good plumber. I would recommend McLay Services to anyone!!"
+3
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Warranties offered
"Just a "simple" ecobee install. Tech had a minor issue with my AC unit (it's 100%my unit) and didn't even attempt to upcharge us. Very honest and knowledgeable company. Will absolutely recommend to everyone I know."
+83
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2022
Free estimates
Warranties offered
"Jaime did a great job restoring my roof wood eaves. It looks like new. He worked very efficiently. Would hire him again."
+6
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 1984
Free estimates
Emergency services offered
"Hector did great on the installation!!"
+177
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2022
Free estimates
Emergency services offered
"Hired them to install a brand new unit, I am extremely satisfied."
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Calls back within minutes. Quote was great. Installed within a few days and left the house in clean condition. Very professionall. The AC unit works great"
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2025
Free estimates
Emergency services offered
"They answered my request quickly and David the technician came to my home to check a problem with my outside unit as it wasn?t turning on, within minutes he figured it out gave me some options and had me cooling again right away! Thank you."
+6
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"Pedro was cordial and professional and gave me options on replacement thermostats that was easy for me to operate."
+9
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1990
Free estimates
Emergency services offered
"Now this is the correct company to go with price beyond fair! And a wonderful experience on time early show up and always smiling and professional. This is the company to hire trustworthy and honest. I am beyond happy with the way that this company treated us."
+2
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