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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS
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Average homeowner rating2.1k+
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Verified Reviews for Subcontracting pros in Diamond Bar, CA
*The Angi rating for Subcontracting 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 Subcontracting needs.
*The HomeAdvisor rating for Subcontracting 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 Subcontracting needs.
Last update on January 18, 2026
Find Subcontractors in Diamond Bar

AYS Plumbing & Rooter Corp.
AYS Plumbing & Rooter Corp.
We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.
"very knowledgeable and very friendly "
Mike L on January 2026
We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.
"very knowledgeable and very friendly "
Mike L on January 2026

All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
The industry's best technicians make the happiest customers. Turn to the pros at All City Plumbing, Air, & Electrical for all of your plumbing, HVAC, and electrical needs. Proudly serving San Bernardino, Riverside, Los Angeles, and Orange Counties. We have over 5000s 5 star reviews across the web from our thrilled customers. Our company goal is to make sure that we have 100% customer satisfaction. We have options and payment plans that can fit in everyones budget. We provide free estimates and you only pay when you're happy. It's no surprise we've received the Angie's List Super Service Award six years in a row! Established in 2009. ACP was created to deliver exceptional service with the highest quality of craftsmanship. We guarantee you will be happy with our services in that we offer a money back guarantee. Our technicians are regarded by their peers to be some of the best in the industry. Our service experts are continuously trained. There isn't a plumbing or hvac problem we can't solve. We have the experience, knowledge and focus to solve any problem you may have. Give us a call today and let us earn your confidence.
"We had our hot water heater replaced and I'm impressed! They didn't charge me extra for calling after 5pm. I was scared of being charged for an emergency call. They texted info of the technician coming to my house. As a woman, I appreciate knowing WHO is coming to my home. I don't want just anybody coming with my child in the house. This is a great family company. They arrived as promised and promptly stopped the old water heater from flooding my garage. My new water heater works great! They fixed my pressure regulator and I can enjoy my house again!"
Catherine S on November 2025
The industry's best technicians make the happiest customers. Turn to the pros at All City Plumbing, Air, & Electrical for all of your plumbing, HVAC, and electrical needs. Proudly serving San Bernardino, Riverside, Los Angeles, and Orange Counties. We have over 5000s 5 star reviews across the web from our thrilled customers. Our company goal is to make sure that we have 100% customer satisfaction. We have options and payment plans that can fit in everyones budget. We provide free estimates and you only pay when you're happy. It's no surprise we've received the Angie's List Super Service Award six years in a row! Established in 2009. ACP was created to deliver exceptional service with the highest quality of craftsmanship. We guarantee you will be happy with our services in that we offer a money back guarantee. Our technicians are regarded by their peers to be some of the best in the industry. Our service experts are continuously trained. There isn't a plumbing or hvac problem we can't solve. We have the experience, knowledge and focus to solve any problem you may have. Give us a call today and let us earn your confidence.
"We had our hot water heater replaced and I'm impressed! They didn't charge me extra for calling after 5pm. I was scared of being charged for an emergency call. They texted info of the technician coming to my house. As a woman, I appreciate knowing WHO is coming to my home. I don't want just anybody coming with my child in the house. This is a great family company. They arrived as promised and promptly stopped the old water heater from flooding my garage. My new water heater works great! They fixed my pressure regulator and I can enjoy my house again!"
Catherine S on November 2025

VM Home Improvement
VM Home Improvement
I am Victor Maldonado, a licensed general contractor with 30 years of experience in the construction field. Whether it's simple home repairs that need to be taken care of, more complex home improvement projects, or a small to-do list, I am here to help you get it done. Please see my reviews to learn why most of clients are repeat customers.
"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."
Marty G on February 2025
I am Victor Maldonado, a licensed general contractor with 30 years of experience in the construction field. Whether it's simple home repairs that need to be taken care of, more complex home improvement projects, or a small to-do list, I am here to help you get it done. Please see my reviews to learn why most of clients are repeat customers.
"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."
Marty G on February 2025

JVEC, INC.
JVEC, INC.
JVEC Inc. Electrical contractor is a small business solution provider for all electrical products and services. We have been in business for 45 years. Our mission is to provide unsurpassed customer service to all of our customers regardless of the project size. Please call our office to schedule your estimate 714-551-9841.
"52-YEAR BUSINESS!!! Jack Vardiman is the TOP electrician to effectively fix/set up your essential electrical systems. Checked Angie's List and selected JVEC Inc. in Brea. Jaclyn provided outstanding customer service and immediately set up an appointment. Jack's knowledge is encyclopedic; his skill is utmost; and his actions are meticulous. He instantly recognized an older GE circuit panel and efficiently replaced the damaged breaker with the appropriate part. Furthermore, the repair fee was very reasonable."
Stella Y on October 2025
JVEC Inc. Electrical contractor is a small business solution provider for all electrical products and services. We have been in business for 45 years. Our mission is to provide unsurpassed customer service to all of our customers regardless of the project size. Please call our office to schedule your estimate 714-551-9841.
"52-YEAR BUSINESS!!! Jack Vardiman is the TOP electrician to effectively fix/set up your essential electrical systems. Checked Angie's List and selected JVEC Inc. in Brea. Jaclyn provided outstanding customer service and immediately set up an appointment. Jack's knowledge is encyclopedic; his skill is utmost; and his actions are meticulous. He instantly recognized an older GE circuit panel and efficiently replaced the damaged breaker with the appropriate part. Furthermore, the repair fee was very reasonable."
Stella Y on October 2025

Top Energy Solutions, Inc.
Top Energy Solutions, Inc.
When it comes to home upgrades, Top Energy Solutions is the market leader. We are a client-focused company that works hard to deliver the best possible results in all of our projects. We understand the importance of trusting a company to deliver your dream, so we strive to meet all of our customers’ expectations and make their dreams come true. We know your house is valuable, and we treat it like it was our own. Enjoy the benefits of lower costs, wide network, access to the best systems on the market, along with the comfort of a client-driven business that is still family-owned and operated. Our company is here to look after you. We will do our very best to fulfill all your HVAC, Insulation, Roofing, Windows, and Solar needs.
"I highly recommend Top Energy Solutions. During the heat wave my air conditioning system blew out hot air. I expected to wait days for a technician to come out. Leor sent one the next morning. The technician quickly located the problem and fixed it within minutes. Their employees are professional, courteous and very knowledgeable."
Terri T on September 2024
When it comes to home upgrades, Top Energy Solutions is the market leader. We are a client-focused company that works hard to deliver the best possible results in all of our projects. We understand the importance of trusting a company to deliver your dream, so we strive to meet all of our customers’ expectations and make their dreams come true. We know your house is valuable, and we treat it like it was our own. Enjoy the benefits of lower costs, wide network, access to the best systems on the market, along with the comfort of a client-driven business that is still family-owned and operated. Our company is here to look after you. We will do our very best to fulfill all your HVAC, Insulation, Roofing, Windows, and Solar needs.
"I highly recommend Top Energy Solutions. During the heat wave my air conditioning system blew out hot air. I expected to wait days for a technician to come out. Leor sent one the next morning. The technician quickly located the problem and fixed it within minutes. Their employees are professional, courteous and very knowledgeable."
Terri T on September 2024

J I G Plumbing
J I G Plumbing
J I G Plumbing has over 20+ years in plumbing background. We specialize in: Water Heater - Install or Replace, Water Heater - Repair or Service, Tankless water heater Installs and repairs, Repipes Copper and Pex, Slab Leak Repairs and Detections, Gas Pipe Repairs and Installs, Faucets, Fixtures and Pipes - Repair or Replace, and Water Treatment & Purification System - Install or Replace, kitchen and bath remodels. No job too big or too small. Give us a call and we will be happy to assist in your plumbing needs..
"very helpful and explained the process of fixing my leak"
Robert C on December 2023
J I G Plumbing has over 20+ years in plumbing background. We specialize in: Water Heater - Install or Replace, Water Heater - Repair or Service, Tankless water heater Installs and repairs, Repipes Copper and Pex, Slab Leak Repairs and Detections, Gas Pipe Repairs and Installs, Faucets, Fixtures and Pipes - Repair or Replace, and Water Treatment & Purification System - Install or Replace, kitchen and bath remodels. No job too big or too small. Give us a call and we will be happy to assist in your plumbing needs..
"very helpful and explained the process of fixing my leak"
Robert C on December 2023

Rapid Rescue Rooter & Plumbing
Rapid Rescue Rooter & Plumbing
Rapid Rescue Rooter & Plumbing, Inc. proudly serves our customers with pride, integrity, and attention to the details that matter most to you. So, why choose Rapid Rescue Rooter? That’s easy!! We have unmatched client service along with 21 years of plumbing and drain service experience. Let us earn your business, you’ll be a client for life. From basic drain cleaning, to complex system installation we have the solution to any plumbing problems you will encounter. While ensuring client confidence with any project through our client care process. Our goal is to provide permanent solutions so you won’t ever have to call us back for today’s plumbing problem, while ensuring through great customer service you call us for any future plumbing needs.
"A complete assessment was made and I was given options for the scope of work. The guys were helpful, tidy, and professional. I would definitely hire them again. "
Hugo N on July 2025
Rapid Rescue Rooter & Plumbing, Inc. proudly serves our customers with pride, integrity, and attention to the details that matter most to you. So, why choose Rapid Rescue Rooter? That’s easy!! We have unmatched client service along with 21 years of plumbing and drain service experience. Let us earn your business, you’ll be a client for life. From basic drain cleaning, to complex system installation we have the solution to any plumbing problems you will encounter. While ensuring client confidence with any project through our client care process. Our goal is to provide permanent solutions so you won’t ever have to call us back for today’s plumbing problem, while ensuring through great customer service you call us for any future plumbing needs.
"A complete assessment was made and I was given options for the scope of work. The guys were helpful, tidy, and professional. I would definitely hire them again. "
Hugo N on July 2025

Orange Independent Plumbing Services
Orange Independent Plumbing Services
At Orange Independent Plumbing Services, we pride ourselves on our professionalism and our clear and concise communication. We specialize in all of your plumbing needs. Give us a call today for an estimate!
"I spoke to Ruben who gave me a call and explained to me exactly what I was talking about in more words I could understand and he set up an appointment time with one of his guys name Levi. Levi came within the time frame I was quoted, looked at what needed to be done, went to get the exact parts that was needed and did the job. Levi was very explanatory about what he did and how it was an easy thing to get done. Levi was kind and resourceful. I would hire him again if and when I need anything else to be done on my house. Thank you so very much Levi. We appreciate everything you have done for me with the job. 😀😀😀"
Amanda T on January 2026
At Orange Independent Plumbing Services, we pride ourselves on our professionalism and our clear and concise communication. We specialize in all of your plumbing needs. Give us a call today for an estimate!
"I spoke to Ruben who gave me a call and explained to me exactly what I was talking about in more words I could understand and he set up an appointment time with one of his guys name Levi. Levi came within the time frame I was quoted, looked at what needed to be done, went to get the exact parts that was needed and did the job. Levi was very explanatory about what he did and how it was an easy thing to get done. Levi was kind and resourceful. I would hire him again if and when I need anything else to be done on my house. Thank you so very much Levi. We appreciate everything you have done for me with the job. 😀😀😀"
Amanda T on January 2026

SO CAL BOYS HEATING & AIR INC
SO CAL BOYS HEATING & AIR INC
We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!
"George & Earvin came out to diagnose my wall heater and were very helpful from start to finish. Highly recommend you give them a call for any HVAC related needs"
Michael S on December 2025
We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of General Contractor services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!
"George & Earvin came out to diagnose my wall heater and were very helpful from start to finish. Highly recommend you give them a call for any HVAC related needs"
Michael S on December 2025

Garafano Electric, Inc.
Garafano Electric, Inc.
Garafano Electric is a local, family-owned establishment based in Eagle Rock. We specialize in all things electric and service individual homes, as well as larger commercial or industrial facilities, for work ranging from small repairs to large-scale projects. We are 11 times Angie’s List Super Service Award recipients (awarded to the "top 5% of qualifying businesses"), and we pride ourselves in providing competitive, fair quotes for all of our work. Give us a call or write us a message and we’ll be sure to assist you in any way we can. First time Angie’s List customers receive a 5% discount!
"Excellent! They were in and out with a crew in one day. We were replacing under kitchen cabinet fluorescent lights with LED. On one cabinet that sits aline, it gave the optical illusion that it was not as bright as the other sections. Will Martinez the owner, came over on Sunday @ 10 am to fix things South as that it looked as it should. All included in the original estimate and invoice. No Extra Charge. TRUE Customer SERVICE!!!!"
Andy A on February 2025
Garafano Electric is a local, family-owned establishment based in Eagle Rock. We specialize in all things electric and service individual homes, as well as larger commercial or industrial facilities, for work ranging from small repairs to large-scale projects. We are 11 times Angie’s List Super Service Award recipients (awarded to the "top 5% of qualifying businesses"), and we pride ourselves in providing competitive, fair quotes for all of our work. Give us a call or write us a message and we’ll be sure to assist you in any way we can. First time Angie’s List customers receive a 5% discount!
"Excellent! They were in and out with a crew in one day. We were replacing under kitchen cabinet fluorescent lights with LED. On one cabinet that sits aline, it gave the optical illusion that it was not as bright as the other sections. Will Martinez the owner, came over on Sunday @ 10 am to fix things South as that it looked as it should. All included in the original estimate and invoice. No Extra Charge. TRUE Customer SERVICE!!!!"
Andy A on February 2025
The Diamond Bar, CA homeowners’ guide to subcontracting services
From average costs to expert advice, get all the answers you need to get your job done.

The cost to install a 240-volt outlet varies depending on the amperage and the home’s current wiring conditions. Use this guide to budget for your next project.

Rewiring a house can be a complex project but don’t let it catch you off guard. Read this to plan ahead and discover the cost to rewire a house.

Electrical subpanels allow you to use appliances and electronics safely. This cost guide explains the important factors to consider when installing a subpanel.

Ready to upgrade your front door and learn how to wire a doorbell? You may be able to handle this relatively simple DIY installation without an electrician.

Installing a USB outlet can enhance your charging situation at home. From what a USB Outlet is to the cost of installation, we’ve rounded up what you need to know before installing an outlet in your home.

Here’s what you need to know to reset an outlet without a reset button. Follow this guide for resetting an outlet in a snap.
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