Top-rated generator install pros.

Get matched with top generator install pros in Markham, IL

There are 7 highly-rated local generator install pros.

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    Verified generator installs reviews

Find Generator install pros in Markham

Avatar for Four Seasons Heating & Air Conditioning

Four Seasons Heating & Air Conditioning

5701 W 73rd St
4.41(
3,061
)
Approved Pro

Four Seasons Heating & Air Conditioning

5701 W 73rd St
4.41(
3,061
)
Approved Pro
Customers say: Super punctual
1832 local quotes requested
54 years of experience

Four Seasons Heating, Air Conditioning, and Plumbing began as a father-son business operating out of a Chicago garage in 1971. They went from home to home repairing furnaces and air conditioners with the goal of offering their customers honest and competent service. No extra charge for 24 hr emergency service. Additional contacts: Chicago 773-413-1505 & 773-413-1028, South suburbs 708-406-3002, Southwest suburbs 815-306-2471, West suburbs 630-210-3352, North & Northwest 847-201-3222 , Northwest Indiana 219-228-8606, and (866) 444-2404. Additional emails - [email protected], [email protected], [email protected]. Additional fax numbers- 773-284-9484, 847-783-0400. Additional contact names - David Musial. Additional DBAs - Four Seasons Heating, Air Conditioning and Plumbing, Four Seasons Heating & Air Conditioning, Inc., Four Seasons Heating & Air.

"Customer Service was great. Install went well considering issues with the house being older."

K S on July 2025

Four Seasons Heating, Air Conditioning, and Plumbing began as a father-son business operating out of a Chicago garage in 1971. They went from home to home repairing furnaces and air conditioners with the goal of offering their customers honest and competent service. No extra charge for 24 hr emergency service. Additional contacts: Chicago 773-413-1505 & 773-413-1028, South suburbs 708-406-3002, Southwest suburbs 815-306-2471, West suburbs 630-210-3352, North & Northwest 847-201-3222 , Northwest Indiana 219-228-8606, and (866) 444-2404. Additional emails - [email protected], [email protected], [email protected]. Additional fax numbers- 773-284-9484, 847-783-0400. Additional contact names - David Musial. Additional DBAs - Four Seasons Heating, Air Conditioning and Plumbing, Four Seasons Heating & Air Conditioning, Inc., Four Seasons Heating & Air.

"Customer Service was great. Install went well considering issues with the house being older."

K S on July 2025


All Service Calls, LLC

9059 O'Neill Drive
4.98(
33
)
Approved Pro

All Service Calls, LLC

9059 O'Neill Drive
4.98(
33
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
22 years of experience

Here at All Service Calls LLC, we pride our company on reliability, great communication, integrity and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Timely and professional. Responsive and completed the job faster than expected with cleanup. "

Collin C on January 2025

Here at All Service Calls LLC, we pride our company on reliability, great communication, integrity and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Timely and professional. Responsive and completed the job faster than expected with cleanup. "

Collin C on January 2025


Avatar for Accent Tel USA

Accent Tel USA

3501 Bessie Coleman Blvd, Suite 25203
4.89(
9
)
Approved Pro

Accent Tel USA

3501 Bessie Coleman Blvd, Suite 25203
4.89(
9
)
Approved Pro
Customers say: Quick response
16 years of experience
Free onsite estimate

Our Company provides a one-stop solution for all of your voice, internet, and telecom needs. Leveraging the Cloud we provide your Office state-of-the-art telephones for little or no upfront cost striving to keep your monthly costs the same. Sound too good to be true? Give us a call and we will show you how.

"Telephone System - Install or Upgrade - For Business "

Anthony O on September 2025

Our Company provides a one-stop solution for all of your voice, internet, and telecom needs. Leveraging the Cloud we provide your Office state-of-the-art telephones for little or no upfront cost striving to keep your monthly costs the same. Sound too good to be true? Give us a call and we will show you how.

"Telephone System - Install or Upgrade - For Business "

Anthony O on September 2025


BB&C Electrical

15255 S 94th Ave, Ste 500
New on AngiNew on Angi
Approved Pro

BB&C Electrical

15255 S 94th Ave, Ste 500
New on AngiNew on Angi
Approved Pro
6 years of experience
Free onsite estimate

At BB&C Electrical, we pride ourselves on providing quality service that customers can believe in. Whether it's panel upgrades or outlets, we can take care of all your electrical needs. Ask us about our service! We look forward to working with you!

At BB&C Electrical, we pride ourselves on providing quality service that customers can believe in. Whether it's panel upgrades or outlets, we can take care of all your electrical needs. Ask us about our service! We look forward to working with you!


Avatar for Mi Tech Guy

Mi Tech Guy

1772 Wedgewood Ct
New on AngiNew on Angi
Approved Pro

Mi Tech Guy

1772 Wedgewood Ct
New on AngiNew on Angi
Approved Pro
20 years of experience

Mi Tech Guy is your one stop shop for all of your roofing needs! 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. Give us a call today! over 34 years of exp m-f 8/-5

Mi Tech Guy is your one stop shop for all of your roofing needs! 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. Give us a call today! over 34 years of exp m-f 8/-5


Centro Development

1800 West Cermak Road
New on AngiNew on Angi
Approved Pro

Centro Development

1800 West Cermak Road
New on AngiNew on Angi
Approved Pro
33 years of experience
Free onsite estimate

It can be a daunting task looking for only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We're only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.

It can be a daunting task looking for only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We're only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.


J.A.W. Duvall

2916 Harolds Crescent
5.00(
1
)
Approved Pro

J.A.W. Duvall

2916 Harolds Crescent
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

J.A.W. Duvall is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 10 years of experience serving Flossmoor, IL and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

"null"

Paulette S on February 2020

J.A.W. Duvall is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 10 years of experience serving Flossmoor, IL and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

"null"

Paulette S on February 2020


Avatar for Rhodium Contractors

Rhodium Contractors

2600 W. 35th St
4.17(
6
)
Approved Pro

Rhodium Contractors

2600 W. 35th St
4.17(
6
)
Approved Pro
Customers say: Quality work
11 years of experience
Free onsite estimate

At Rhodium Contractors we specialize in indoor & outdoor home renovation, as well as general handymen work. We are strongly committed to providing high-quality work and customer service. We offer free estimates and will work with you side by side on every aspect along the way. We uphold a high standard of integrity bound by fairness, honesty, and responsibility in all of our jobs. There is no job too big, or too small for our team. Call in today and let us put our experience to work for you!

"did a good job"

Alicia J on May 2024

At Rhodium Contractors we specialize in indoor & outdoor home renovation, as well as general handymen work. We are strongly committed to providing high-quality work and customer service. We offer free estimates and will work with you side by side on every aspect along the way. We uphold a high standard of integrity bound by fairness, honesty, and responsibility in all of our jobs. There is no job too big, or too small for our team. Call in today and let us put our experience to work for you!

"did a good job"

Alicia J on May 2024


Avatar for Flowing Through Connections, Inc.

Flowing Through Connections, Inc.

6351 W. Montrose Ave. # 233
4.88(
25
)
Approved Pro

Flowing Through Connections, Inc.

6351 W. Montrose Ave. # 233
4.88(
25
)
Approved Pro
Customers say: Quick response
25 years of experience
Emergency services offered

Flowing Through Connections, Inc., sends a commitment to our clients with a signature that says, Telecommunications Experience you can trust. We are a Telecommunications Services provider designed to meet your business needs. Minimum Charge: $175.00 per hour x 2. Give us a call today! . . V E T E R A N -- O W N E D PLEASE NOTE THAT WE ARE A BUSINESS-TO-BUSINESS COMPANY ONLY. We DO NOT service RESIDENTIAL customers.

"Great service and great experience. "

Mimi N on October 2025

Flowing Through Connections, Inc., sends a commitment to our clients with a signature that says, Telecommunications Experience you can trust. We are a Telecommunications Services provider designed to meet your business needs. Minimum Charge: $175.00 per hour x 2. Give us a call today! . . V E T E R A N -- O W N E D PLEASE NOTE THAT WE ARE A BUSINESS-TO-BUSINESS COMPANY ONLY. We DO NOT service RESIDENTIAL customers.

"Great service and great experience. "

Mimi N on October 2025


Ampcom

8225 West Bruns Road
New on AngiNew on Angi
Approved Pro

Ampcom

8225 West Bruns Road
New on AngiNew on Angi
Approved Pro
23 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity and quality work. We are experts in our electrical work and will do our best to keep you as educated as we can on your particular task or project. We look forward to working with you.

We pride our company on reliability, great communication, integrity and quality work. We are experts in our electrical work and will do our best to keep you as educated as we can on your particular task or project. We look forward to working with you.

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Generator Install questions, answered by experts

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

The typical cost of a home generator is around $5,000, but prices range from $400 up to $13,000, depending on a few factors. The most significant cost factor is the generator size, as larger generators that can support more square footage usually cost more. You can install an emergency backup generator for between $500 and $2,000 or a partial-home generator for between $2,000 and $6,500. Whole-home generators usually total between $5,000 and $13,000, with some models climbing as high as $18,000.

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

The Markham, IL homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.