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Find Addition to existing structure builders in Thornton

Avatar for Wentworth Construction

Wentworth Construction

870 Schultz St
5.00(
21
)
Approved Pro

Wentworth Construction

870 Schultz St
5.00(
21
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
23 years of experience

Wentworth Construction, Inc., is 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.

"It went excellent, they're innovative, problem solving and professional very trust worthy, outstanding planning and quality. Hight attention to detail and creativity. Worked within budget, this is our first big project we highly recommend and will hire Wentworth crew again. Be sure to consider Wentworth for your next instruction project."

Diana W on May 2024

Wentworth Construction, Inc., is 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.

"It went excellent, they're innovative, problem solving and professional very trust worthy, outstanding planning and quality. Hight attention to detail and creativity. Worked within budget, this is our first big project we highly recommend and will hire Wentworth crew again. Be sure to consider Wentworth for your next instruction project."

Diana W on May 2024


Avatar for URB REMODELING & RENOVATION CO.

URB REMODELING & RENOVATION CO.

4751 W Touhy Ave
4.92(
13
)
Approved Pro

URB REMODELING & RENOVATION CO.

4751 W Touhy Ave
4.92(
13
)
Approved Pro
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
59 local quotes requested

Chicago's Kitchen Remodeling and Bathroom Renovation company - URB Remodeling & Renovation Co. Our specialty is high rise condo remodeling, kitchen and bathroom renovations as well as basement finishing. We excel at finding solutions for challenging remodeling projects and turning ordinary or outdated kitchens and bathrooms into unique living spaces. URB Remodeling & Renovation Co team consists of experienced project managers, skilled craftsman, exceptional tile installers, professional painters, professional plumbers, licensed electricians, seasoned structural engineers, expert architects and refined interior designers. URB Remodeling and Renovation Co. serves Chicago, Skokie, Evanston, Wilmette, Kenilworth, Glencoe, Winnetka, Highland Park, Lake Forest, Deerfield, Riverwoods, Bannockburn, Northbrook, Northfield, Glenview, Niles, Park Ridge, Lincolnwood, Lincolnshire, Lake Bluff, Des Plaines, Round Lake, and other Chicagoland locations.

"We hired URB to repair and restore our basement after a small flood. The new tile floor is perfection! All of the work is top-notch. The price was reasonable, and the workmen were punctual, polite, respectful, and so tidy. I would use URB in the future for any other remodeling needs that might arise."

Christine S on February 2021

Chicago's Kitchen Remodeling and Bathroom Renovation company - URB Remodeling & Renovation Co. Our specialty is high rise condo remodeling, kitchen and bathroom renovations as well as basement finishing. We excel at finding solutions for challenging remodeling projects and turning ordinary or outdated kitchens and bathrooms into unique living spaces. URB Remodeling & Renovation Co team consists of experienced project managers, skilled craftsman, exceptional tile installers, professional painters, professional plumbers, licensed electricians, seasoned structural engineers, expert architects and refined interior designers. URB Remodeling and Renovation Co. serves Chicago, Skokie, Evanston, Wilmette, Kenilworth, Glencoe, Winnetka, Highland Park, Lake Forest, Deerfield, Riverwoods, Bannockburn, Northbrook, Northfield, Glenview, Niles, Park Ridge, Lincolnwood, Lincolnshire, Lake Bluff, Des Plaines, Round Lake, and other Chicagoland locations.

"We hired URB to repair and restore our basement after a small flood. The new tile floor is perfection! All of the work is top-notch. The price was reasonable, and the workmen were punctual, polite, respectful, and so tidy. I would use URB in the future for any other remodeling needs that might arise."

Christine S on February 2021


Avatar for Gener Construction

Gener Construction

5.00(
12
)
Approved Pro

Gener Construction

5.00(
12
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
115 local quotes requested

We have the experience and dedication to bring your dreams to reality! We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!

"They did exactly what I needed. Professional, thorough in cleaning, explaining the process."

Geri D on December 2024

We have the experience and dedication to bring your dreams to reality! We guarantee your satisfaction, and we won’t leave until the job is done right. Our team has quality experience in this industry, and we make sure our customers are happy before we leave. Call or click to schedule an estimate today!

"They did exactly what I needed. Professional, thorough in cleaning, explaining the process."

Geri D on December 2024


Avatar for Budget Construction

Budget Construction

5334 N Kedzie Ave Ste 5
3.35(
23
)
Approved Pro

Budget Construction

5334 N Kedzie Ave Ste 5
3.35(
23
)
Approved Pro
456 local quotes requested
49 years of experience

We can answer all of your design, installation and remodeling concerns on custom home improvement. Dealing directly with owners; we will beat any competitive price. Our company was founded in 1976 and has been a family-owned and operated business ever since. Our goal is to make your home remodeling experience enjoyable while allowing you to appreciate the quality of our work for years to come. We provide all types of remodeling projects including kitchens, bathrooms, room additions, roofing, and siding. Basically, anything you need updated and remodeled in your home, we can help. All of your design, installation, and remodeling questions and concerns will be answered by one of our experienced and professional design specialists. At Budget Construction Company, we work directly with homeowners and will beat any legitimate price.

"Michael has not shown up for the 10am appointment per Giovanni who contacted me yesterday and scheduled the appointment. It is now 11am. No one call or follow up at all. Waited for an hour and no show. This is not how business works. Can't trust your company already since you can't even committee a simple appointment. Very disappointed and waisted my valuable time. Please don't call my number anymore. I would give no star but not an option. Highly NOT recommended!!"

Angel C on September 2025

We can answer all of your design, installation and remodeling concerns on custom home improvement. Dealing directly with owners; we will beat any competitive price. Our company was founded in 1976 and has been a family-owned and operated business ever since. Our goal is to make your home remodeling experience enjoyable while allowing you to appreciate the quality of our work for years to come. We provide all types of remodeling projects including kitchens, bathrooms, room additions, roofing, and siding. Basically, anything you need updated and remodeled in your home, we can help. All of your design, installation, and remodeling questions and concerns will be answered by one of our experienced and professional design specialists. At Budget Construction Company, we work directly with homeowners and will beat any legitimate price.

"Michael has not shown up for the 10am appointment per Giovanni who contacted me yesterday and scheduled the appointment. It is now 11am. No one call or follow up at all. Waited for an hour and no show. This is not how business works. Can't trust your company already since you can't even committee a simple appointment. Very disappointed and waisted my valuable time. Please don't call my number anymore. I would give no star but not an option. Highly NOT recommended!!"

Angel C on September 2025


Avatar for Angels Ladies Construction LLC

Angels Ladies Construction LLC

Avenue
4.38(
8
)
Approved Pro

Angels Ladies Construction LLC

Avenue
4.38(
8
)
Approved Pro
Customers say: Quick response
218 local quotes requested
Free onsite estimate

General Contractor Handy man service,Kitchens,Countertop,Floors,Bathroom,remodeling, Drywall installation painting,and much more. We have the experience and dedication to get the job done right! We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today! Comercial and residential services electric services. - -we are affiliated with the Better Business Bureau (BBB) and Workers Compensation Insurance bonded certification.Grand Opening Roofing License Certification!!!

"Great customer service"

Mike M on October 2025

General Contractor Handy man service,Kitchens,Countertop,Floors,Bathroom,remodeling, Drywall installation painting,and much more. We have the experience and dedication to get the job done right! We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today! Comercial and residential services electric services. - -we are affiliated with the Better Business Bureau (BBB) and Workers Compensation Insurance bonded certification.Grand Opening Roofing License Certification!!!

"Great customer service"

Mike M on October 2025


Avatar for Abraham Sanchez Home Improvement

Abraham Sanchez Home Improvement

.
4.90(
20
)
Approved Pro

Abraham Sanchez Home Improvement

.
4.90(
20
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
440 local quotes requested

We are providers of construction services in the Northwest Indiana area. Our mission is to maintain the highest quality and professionalism from start to finish. We are confident in our results because all our jobs are custom for the needs of each home. We strive for the highest degree of quality products and workmanship. During the years in Abraham Sanchez Home Improvement business, Abraham Sanchez Home Improvement has satisfied many customers. It is our reputation of quality work, professionalism, and customer service our customers continue to rely on us for their needs. To understand the expectations of our customers, we take great care to work and communicate with every customer professionally. We base our reputation on service, safety, and quality. Call us today and find out how we can meet all your construction needs!

"Great crew! Highly recommend. This is the 95th home I have either built or remodeled and I wish I had found them years ago"

Greg W on October 2025

We are providers of construction services in the Northwest Indiana area. Our mission is to maintain the highest quality and professionalism from start to finish. We are confident in our results because all our jobs are custom for the needs of each home. We strive for the highest degree of quality products and workmanship. During the years in Abraham Sanchez Home Improvement business, Abraham Sanchez Home Improvement has satisfied many customers. It is our reputation of quality work, professionalism, and customer service our customers continue to rely on us for their needs. To understand the expectations of our customers, we take great care to work and communicate with every customer professionally. We base our reputation on service, safety, and quality. Call us today and find out how we can meet all your construction needs!

"Great crew! Highly recommend. This is the 95th home I have either built or remodeled and I wish I had found them years ago"

Greg W on October 2025


Avatar for Prime Bath

Prime Bath

660 S Broadway
4.96(
28
)
Approved Pro

Prime Bath

660 S Broadway
4.96(
28
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1614 local quotes requested

Prime Baths and Home Solutions of Illinois is the leader in exceptional custom service for bathroom remodeling projects in the greater Chicagoland area! We provide excellent craftsmanship while offering very competitive pricing, as well as in house installers. No Sub -Contractors! We additionally offer products that are backed up with a lifetime warranty, and have incredible financing offers! Rates as low as 0%. Contact us today to set up a FREE in home quote. We look forward to hearing from you!

"The men made a great new shower area! They cleaned up as well! I called the office to try to arrange the balance of work. Haven’t heard back from anyone - but yes! The work great!"

Jean H on November 2024

Prime Baths and Home Solutions of Illinois is the leader in exceptional custom service for bathroom remodeling projects in the greater Chicagoland area! We provide excellent craftsmanship while offering very competitive pricing, as well as in house installers. No Sub -Contractors! We additionally offer products that are backed up with a lifetime warranty, and have incredible financing offers! Rates as low as 0%. Contact us today to set up a FREE in home quote. We look forward to hearing from you!

"The men made a great new shower area! They cleaned up as well! I called the office to try to arrange the balance of work. Haven’t heard back from anyone - but yes! The work great!"

Jean H on November 2024


Avatar for Envy Home Services, Inc.

Envy Home Services, Inc.

575 South Arthur Avenue
4.86(
109
)
Approved Pro

Envy Home Services, Inc.

575 South Arthur Avenue
4.86(
109
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
285 local quotes requested

Welcome to Envy Home Services, Chicagoland’s trusted designer and installer of All Season Sunrooms, Three Season Sunrooms, Screen Rooms, Patio Covers, Pergolas, Awnings, and more. Homeowners come to Envy for their home improvement needs because they want their project to be completed on time, within budget and worry-free. Our mission starts with designing the right living space just for you. Then, with careful planning, our professional installation team gets to work. The transformation of an underused or unattractive space takes hold before your eyes, and you’ll see the new space just as you imagined. If you’re looking for a sunroom, room addition, Patio Cover or Pergola you’ll love the final product the Envy team will deliver for you. With a focus on personalized service, we’ll design the space and complete the final touches as if it’s our own home. A family-owned, local company, we’ll go the extra mile to earn your business.

"Working with Envy Home Services was smooth, professional, and enjoyable from start to finish. We had long dreamed of adding a sunroom for our growing family to relax, eat, play, and enjoy the sunlight—and they delivered beyond expectations. Communication was excellent! Every step was clearly explained, and we always felt informed. Whether by text, phone, or in-person, they were responsive, friendly, and professional. They truly listened to our ideas and concerns. Even with permitting delays from our village, Envy stayed on schedule and completed the project right on time. Pricing was fair and transparent. We received high-quality work at a reasonable price, with a flexible payment plan and financing. Most importantly, the finished sunroom is stunning! It blends seamlessly with our home and has become our favorite space. The craftsmanship and detail are top-notch. We couldn’t be happier and highly recommend Envy Home Services to anyone seeking a trustworthy, skilled contractor."

James Q on August 2025

Welcome to Envy Home Services, Chicagoland’s trusted designer and installer of All Season Sunrooms, Three Season Sunrooms, Screen Rooms, Patio Covers, Pergolas, Awnings, and more. Homeowners come to Envy for their home improvement needs because they want their project to be completed on time, within budget and worry-free. Our mission starts with designing the right living space just for you. Then, with careful planning, our professional installation team gets to work. The transformation of an underused or unattractive space takes hold before your eyes, and you’ll see the new space just as you imagined. If you’re looking for a sunroom, room addition, Patio Cover or Pergola you’ll love the final product the Envy team will deliver for you. With a focus on personalized service, we’ll design the space and complete the final touches as if it’s our own home. A family-owned, local company, we’ll go the extra mile to earn your business.

"Working with Envy Home Services was smooth, professional, and enjoyable from start to finish. We had long dreamed of adding a sunroom for our growing family to relax, eat, play, and enjoy the sunlight—and they delivered beyond expectations. Communication was excellent! Every step was clearly explained, and we always felt informed. Whether by text, phone, or in-person, they were responsive, friendly, and professional. They truly listened to our ideas and concerns. Even with permitting delays from our village, Envy stayed on schedule and completed the project right on time. Pricing was fair and transparent. We received high-quality work at a reasonable price, with a flexible payment plan and financing. Most importantly, the finished sunroom is stunning! It blends seamlessly with our home and has become our favorite space. The craftsmanship and detail are top-notch. We couldn’t be happier and highly recommend Envy Home Services to anyone seeking a trustworthy, skilled contractor."

James Q on August 2025


Avatar for Luna Lever LLC

Luna Lever LLC

5.00(
3
)
Approved Pro

Luna Lever LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1097 local quotes requested

At Luna Lever LLC, we're a team with over 30 years of experience in railroad maintenance, concrete, demolition, and excavation services. We also provide landscape and snow removal services. We offer a wide range of maintenance and construction services in Northwest, Indiana and Chicagoland demolition excavation construction demolition concrete excavation landscape snow removal maintenance and construction

"Extremely well. They're hard workers and they also cleaned up well. The turf looks amazing. 👌"

Deborah S on September 2025

At Luna Lever LLC, we're a team with over 30 years of experience in railroad maintenance, concrete, demolition, and excavation services. We also provide landscape and snow removal services. We offer a wide range of maintenance and construction services in Northwest, Indiana and Chicagoland demolition excavation construction demolition concrete excavation landscape snow removal maintenance and construction

"Extremely well. They're hard workers and they also cleaned up well. The turf looks amazing. 👌"

Deborah S on September 2025


J T General Contracting

141 Woodside Rd
4.45(
664
)
Approved Pro

J T General Contracting

141 Woodside Rd
4.45(
664
)
Approved Pro
Customers say: Super punctual
2323 local quotes requested
37 years of experience

Owner-operated. Uses subs for plumbing & roofing. Cost is determined by the job. No travel charges. Service fees may apply. May contact through email or cell phone

"I have been in construction for nearly 50 years, so I have developed a keen eye for quality craftsmanship. Our project was no small project, so there was a genuine concern that the right company be hired to do our project. After reading J T General Contracting's reviews, I reached out to Jim for an estimate. Again, as I stated earlier, I have been involved in construction for nearly 50 years, so when a contractor shows up for an estimate when he stated that he would, that is a good first step. In talking with Jim about our project, it didn't take long for me to realize that he knows what he is talking about and how our project should be approach. After interviewing two other contractors, it was a no brainer to go with J T General Contractors. Our project just completed today, and I can state that from the demolition of our existing deck, to the layout and installation of piers, Posts, Joists, Trex Composite Deck (with stairs and raised platform for the Spa) and composite Railings, I could not find one flaw in his workmanship. Jim takes a great deal of pride in the work that he is installing and demands that from his employees as well. Secondly, Jim has excellent communication skills, not only in responding to phone calls or text messages, but explaining what he will be doing each step of the way. I would have no problem referring J T General Contracting to family and friends and will be using Jim for our future projects."

Bill H on July 2020

Owner-operated. Uses subs for plumbing & roofing. Cost is determined by the job. No travel charges. Service fees may apply. May contact through email or cell phone

"I have been in construction for nearly 50 years, so I have developed a keen eye for quality craftsmanship. Our project was no small project, so there was a genuine concern that the right company be hired to do our project. After reading J T General Contracting's reviews, I reached out to Jim for an estimate. Again, as I stated earlier, I have been involved in construction for nearly 50 years, so when a contractor shows up for an estimate when he stated that he would, that is a good first step. In talking with Jim about our project, it didn't take long for me to realize that he knows what he is talking about and how our project should be approach. After interviewing two other contractors, it was a no brainer to go with J T General Contractors. Our project just completed today, and I can state that from the demolition of our existing deck, to the layout and installation of piers, Posts, Joists, Trex Composite Deck (with stairs and raised platform for the Spa) and composite Railings, I could not find one flaw in his workmanship. Jim takes a great deal of pride in the work that he is installing and demands that from his employees as well. Secondly, Jim has excellent communication skills, not only in responding to phone calls or text messages, but explaining what he will be doing each step of the way. I would have no problem referring J T General Contracting to family and friends and will be using Jim for our future projects."

Bill H on July 2020

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FAQs for addition to existing structure building service projects in Thornton, IL

Yes, hidden rooms are legal, as long as they meet all local building regulations. If you sell your house, most states require homeowners to disclose full houseplans, which would include any hidden rooms.

If your secret room is a safe room, it should contain a means of communication aside from a cell phone, such as a shortwave radio. You should also have plenty of drinking water, a portable generator, emergency food supplies, blankets, pillows, flashlights, batteries and a first aid kit.

Any time you update your home’s square footage, you increase its value, but a secret room is a niche feature that doesn't rank high on every buyer’s list of must-haves. Investing your money in remodeling more common living areas like bedrooms, bathrooms, or kitchens will have a higher ROI than adding a secret room. Many secret rooms can act as entertainment spaces (think a game room or wine cellar) or quiet spaces (a library or study), so when building your secret room you may want to consider its versatility for when you’re ready to sell.

The Thornton, IL homeowners’ guide to addition to existing structure building services

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

  • A renovated kitchen with a waterfall island

    HomeAdvisor’s DIY Kitchen Remodel Cost Guide looks at the cost of buying supplies and doing the work yourself. Find the key cost factors and how to cut expenses.

  • Secret room within bookcase

    HomeAdvisor's expert guide walks you through the cost to build a secret room, whether you're creating a safe room for security or a fun space to fulfil your childhood fantasies. Use this guide to help plan your secret room project and explore room, concea

  • outdoor patio bar

    Explore the cost to build a bar in your home and learn how materials, wet vs. dry bars, and labor costs influence the total price of your project.