Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in your area

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Addition to existing structure builders in Riverton

Avatar for POSEIDON GENERAL CONSTRUCTION LLC
POSEIDON GENERAL CONSTRUCTION LLC
710 ABBI RD # 710
New on HomeAdvisorNew on Angi
Approved Pro
POSEIDON GENERAL CONSTRUCTION LLC
710 ABBI RD # 710
New on AngiNew on HomeAdvisor
Approved Pro
1 years of experience
Free onsite estimate

POSEIDON GENERAL CONSTRUCTION LLC is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. POSEIDON GENERAL CONSTRUCTION LLC is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

POSEIDON GENERAL CONSTRUCTION LLC is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. POSEIDON GENERAL CONSTRUCTION LLC is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!


Gallaher & Sons Construction Inc
277 E. Clinton St
5.00(
7
)
Approved Pro
Gallaher & Sons Construction Inc
277 E. Clinton St
5.00(
7
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
47 years of experience

Gallaher & Sons Construction Inc is 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 Home Improvement services that are customizable to each individual project. We specialize in Additions. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"We were extremely happy with our addition. Greg and his crew were very professional from beginning to end. Great workmanship! I would highly recommend him."

paige d on November 2021

Gallaher & Sons Construction Inc is 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 Home Improvement services that are customizable to each individual project. We specialize in Additions. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"We were extremely happy with our addition. Greg and his crew were very professional from beginning to end. Great workmanship! I would highly recommend him."

paige d on November 2021


Fischer Building and Remodeling
517 Broad Street
4.33(
6
)
Approved Pro
Fischer Building and Remodeling
517 Broad Street
4.33(
6
)
Approved Pro
Customers say: Terrific value
29 years of experience
Free onsite estimate

Fischer Building&Remodeling has over 20 years experience in all aspects of home remodeling. We will keep your home clean and tidy during the project. Ask how we can make your next project easy and affordable.

"Professional workmanship and ethic. You may not even realize they are there, until you gaze upon the beautiful finished product. Great communication skills also. We will definitely reach out to this company for our next big or small project and recommend them moving forward. Thanks again!"

Michael B on April 2023

Fischer Building&Remodeling has over 20 years experience in all aspects of home remodeling. We will keep your home clean and tidy during the project. Ask how we can make your next project easy and affordable.

"Professional workmanship and ethic. You may not even realize they are there, until you gaze upon the beautiful finished product. Great communication skills also. We will definitely reach out to this company for our next big or small project and recommend them moving forward. Thanks again!"

Michael B on April 2023


Avatar for Basic Basement Co
Basic Basement Co
122 Park Ave
4.83(
313
)
Approved Pro
Basic Basement Co
122 Park Ave
4.83(
313
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
25 local quotes requested

With over 40 years combined experience, we provide complete Basement remodeling and finishing services with Free estimates and no-nonsense pricing. We will give you the Basement you've always wanted by transforming your previously unfinished Basement into a usable and comfortable living area you can be proud of. We are known for constant communication and on-site project management.

"We recently had the pleasure of working with Basic Companies to finish our basement, and we couldn't be happier with the results! From the initial layout and permits to framing, electrical work, sheetrock, spackling, painting, and flooring, they handled every aspect of the project with utmost professionalism and expertise. Each team that came to our house was knowledgeable, hardworking, and incredibly professional. They were always responsive to our questions and ensured that we were kept informed throughout the entire process. The project was completed within the promised time frame, and to our delight, it was actually finished much earlier than expected. Our family is thrilled with the final result. The finished basement has exceeded our expectations in every way, and we are grateful to Basic Companies for their exceptional work. We highly recommend them to anyone looking for a reliable and skilled team to handle their home improvement projects."

Jason P on April 2025

With over 40 years combined experience, we provide complete Basement remodeling and finishing services with Free estimates and no-nonsense pricing. We will give you the Basement you've always wanted by transforming your previously unfinished Basement into a usable and comfortable living area you can be proud of. We are known for constant communication and on-site project management.

"We recently had the pleasure of working with Basic Companies to finish our basement, and we couldn't be happier with the results! From the initial layout and permits to framing, electrical work, sheetrock, spackling, painting, and flooring, they handled every aspect of the project with utmost professionalism and expertise. Each team that came to our house was knowledgeable, hardworking, and incredibly professional. They were always responsive to our questions and ensured that we were kept informed throughout the entire process. The project was completed within the promised time frame, and to our delight, it was actually finished much earlier than expected. Our family is thrilled with the final result. The finished basement has exceeded our expectations in every way, and we are grateful to Basic Companies for their exceptional work. We highly recommend them to anyone looking for a reliable and skilled team to handle their home improvement projects."

Jason P on April 2025


Avatar for Nelly's Construction LLC
Nelly's Construction LLC
4.95(
22
)
Approved Pro
Nelly's Construction LLC
4.95(
22
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1507 local quotes requested

We specialize in concrete services, repairs, pouring, leveling, driveways, walkways, stamped patios, and more! 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! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"Nelly was amazing to work with. Poured a 600sqft pad for our patio and it came out great. One of the slabs needed some help and he removed it and replaced it without question. He stuck by his word and absolutely crushed the job! Hard to find great men that stick to there word in the industry. Thank you Nelson!"

Sam D on May 2025

We specialize in concrete services, repairs, pouring, leveling, driveways, walkways, stamped patios, and more! 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! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"Nelly was amazing to work with. Poured a 600sqft pad for our patio and it came out great. One of the slabs needed some help and he removed it and replaced it without question. He stuck by his word and absolutely crushed the job! Hard to find great men that stick to there word in the industry. Thank you Nelson!"

Sam D on May 2025


Avatar for Bowen Contracting Inc
Bowen Contracting Inc
PO Box 21
4.92(
119
)
Approved Pro
Bowen Contracting Inc
PO Box 21
4.92(
119
)
Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
474 local quotes requested

We are an established locally owned business since 1991. We provide all aspects of home building and remodeling. We are experts in complete basement remodels and finishing, decks, porches, additions, kitchen, bath, roofing and siding. I have built Bowen Contracting Inc. on my reputation. My business license number is on record at the New Jersey Office Attorney General Division of Consumers Affairs offices. We carry a $1,000,000 liability insurance policy held with Associated Ins. Partners, LLC. We are also a member of the Better Business Bureau. My staff are skilled professionals. We are small enough to give personal service but big enough to handle the largest and most difficult projects. You will be dealing with the hands on owner from the initial proposal through to the end of your project. Our goal is to ensure your complete satisfaction throughout every phase of the construction process. Call, Text or Email me anytime @ (609) 405-1577 / bowencontracting@comcast.net

"Excellent contractor! Jeff and his team are awesome and easy to work with. Great communication, punctual, and the job gets done right by skilled professionals. I am so happy with my porch. You’ll have no regrets hiring this crew!"

Shane W on September 2024

We are an established locally owned business since 1991. We provide all aspects of home building and remodeling. We are experts in complete basement remodels and finishing, decks, porches, additions, kitchen, bath, roofing and siding. I have built Bowen Contracting Inc. on my reputation. My business license number is on record at the New Jersey Office Attorney General Division of Consumers Affairs offices. We carry a $1,000,000 liability insurance policy held with Associated Ins. Partners, LLC. We are also a member of the Better Business Bureau. My staff are skilled professionals. We are small enough to give personal service but big enough to handle the largest and most difficult projects. You will be dealing with the hands on owner from the initial proposal through to the end of your project. Our goal is to ensure your complete satisfaction throughout every phase of the construction process. Call, Text or Email me anytime @ (609) 405-1577 / bowencontracting@comcast.net

"Excellent contractor! Jeff and his team are awesome and easy to work with. Great communication, punctual, and the job gets done right by skilled professionals. I am so happy with my porch. You’ll have no regrets hiring this crew!"

Shane W on September 2024


Avatar for Carpentry USA LLC
Carpentry USA LLC
PO Box 838
5.00(
36
)
Approved Pro
Carpentry USA LLC
PO Box 838
5.00(
36
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
1598 local quotes requested

Our company has been in operation for over 20 years. We specialize in Construction Services and Home Renovation and Repairs, striving for 100% customer satisfaction delivering top notch quality in our craft. Whether it's a mold cleanup or a major construction project, we are available for all of your home improvement needs. We have worked in over 4,000 residential and commercial locations, including repairing and rebuilding homes for national home builders. Our rates are honest and reasonable. I am committed to being 1 of the best contractors around! As a licensed General Contractor, We are ready to apply our experience and skills to any of your projects. Call or email me, Toby Perfetto, to discuss your project. GET IT DONE RIGHT THE 1ST TIME!

"Wonderful, Eric Nesbit, was excellent; so very knowledgeable, though and professional and courteous."

Maryellen D on June 2021

Our company has been in operation for over 20 years. We specialize in Construction Services and Home Renovation and Repairs, striving for 100% customer satisfaction delivering top notch quality in our craft. Whether it's a mold cleanup or a major construction project, we are available for all of your home improvement needs. We have worked in over 4,000 residential and commercial locations, including repairing and rebuilding homes for national home builders. Our rates are honest and reasonable. I am committed to being 1 of the best contractors around! As a licensed General Contractor, We are ready to apply our experience and skills to any of your projects. Call or email me, Toby Perfetto, to discuss your project. GET IT DONE RIGHT THE 1ST TIME!

"Wonderful, Eric Nesbit, was excellent; so very knowledgeable, though and professional and courteous."

Maryellen D on June 2021


Avatar for Volkert Remodeling Inc
Volkert Remodeling Inc
1160 Lake Dr.
4.91(
74
)
Approved Pro
Volkert Remodeling Inc
1160 Lake Dr.
4.91(
74
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
95 local quotes requested

Volkert Remodeling Inc. is the one stop resource for Home Remodeling, specializing in Kitchens and Bathrooms. Super Service Award winners for 2016, 2015 and 2014. We make sure that the job is completed from beginning to end and that our customers are happy with the quality and craftsmanship throughout. Please call us today to schedule your appointment - (610) 960-1097

"From start to end the kitchen renovation process went extremely well. Don made sure to include me through it all and made sure I was pleased with each step. Whenever a decision is needed, Don explains the options and impact of each. He and his employee, also named Don, are prompt every day and attentive to details. They do the work right with high quality workmanship. I am extremely grateful to have had this experience that has resulted in beautiful kitchen. Without hesitation, I plan to contact Don Volkert for any future projects I need done."

Tom W on December 2024

Volkert Remodeling Inc. is the one stop resource for Home Remodeling, specializing in Kitchens and Bathrooms. Super Service Award winners for 2016, 2015 and 2014. We make sure that the job is completed from beginning to end and that our customers are happy with the quality and craftsmanship throughout. Please call us today to schedule your appointment - (610) 960-1097

"From start to end the kitchen renovation process went extremely well. Don made sure to include me through it all and made sure I was pleased with each step. Whenever a decision is needed, Don explains the options and impact of each. He and his employee, also named Don, are prompt every day and attentive to details. They do the work right with high quality workmanship. I am extremely grateful to have had this experience that has resulted in beautiful kitchen. Without hesitation, I plan to contact Don Volkert for any future projects I need done."

Tom W on December 2024


MAS Homes & Construction, LLC
59 Pineview Terrace
4.00(
8
)
Approved Pro
MAS Homes & Construction, LLC
59 Pineview Terrace
4.00(
8
)
Approved Pro
Customers say: Quick response
1202 local quotes requested
5 years of experience

We specialize in all phases of remodeling for your home, business, bathrooms, kitchens, finishing basements, and more! 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! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"It was amazing 🤩 I made a call to MAS and Harold and Lauren were at my home the next day. Harold, Pete and Gabrielle were extremely hard working and so courteous and such a joy to work with!! I actually was so pleased with the deck that I asked for a quote on vinyl fencing. I would strongly recommend this company for any work needed. It means so much when the actual owner of the company comes and does the work alongside his employees. I did happen to see one horrible review from someone who was 100% 😑. It was actually the only bad review so clearly it was not the fault of MAS but rather the idiot that posted such an incredibly inaccurate and incorrect review. I will definitely recommend this company to my family and friends and take it from me, I can really be a PITA when things are getting done at my home but not once was I ever meant to feel like I was being a PITA. The customer service skills of Harold and Lauren and their team is remarkable!!!"

Lilla C on April 2025

We specialize in all phases of remodeling for your home, business, bathrooms, kitchens, finishing basements, and more! 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! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"It was amazing 🤩 I made a call to MAS and Harold and Lauren were at my home the next day. Harold, Pete and Gabrielle were extremely hard working and so courteous and such a joy to work with!! I actually was so pleased with the deck that I asked for a quote on vinyl fencing. I would strongly recommend this company for any work needed. It means so much when the actual owner of the company comes and does the work alongside his employees. I did happen to see one horrible review from someone who was 100% 😑. It was actually the only bad review so clearly it was not the fault of MAS but rather the idiot that posted such an incredibly inaccurate and incorrect review. I will definitely recommend this company to my family and friends and take it from me, I can really be a PITA when things are getting done at my home but not once was I ever meant to feel like I was being a PITA. The customer service skills of Harold and Lauren and their team is remarkable!!!"

Lilla C on April 2025


Avatar for Medina's landscaping
Medina's landscaping
4.82(
11
)
Approved Pro
Medina's landscaping
4.82(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
677 local quotes requested

Ours services are: Mowing, Shrub trimming, Cutting tree trimming, Removal, Edging, Full clean-ups,Stump grinder, Plants and Flowers,Sodding installation Mulching, Topsoil, french drain, wood fence. OUR proposition as a company is satisfying our customers with our services, our responsibility and quality. I have been 9 years working in this business but for someone else.For the moment we are a small business but we want too be more than that.

"They were awesome, very quick to answer any questions or concerns. Our yard looks amazing thanks to them. Would definitely hire again!!"

Tatum F on July 2024

Ours services are: Mowing, Shrub trimming, Cutting tree trimming, Removal, Edging, Full clean-ups,Stump grinder, Plants and Flowers,Sodding installation Mulching, Topsoil, french drain, wood fence. OUR proposition as a company is satisfying our customers with our services, our responsibility and quality. I have been 9 years working in this business but for someone else.For the moment we are a small business but we want too be more than that.

"They were awesome, very quick to answer any questions or concerns. Our yard looks amazing thanks to them. Would definitely hire again!!"

Tatum F on July 2024

...
Showing 1-10 of 937

Addition to existing structure building services FAQs

How far you can push a room depends on the structure you choose. A cantilevered bump-out can extend 24 inches before building codes require its own footing or foundation. Anything longer needs engineered support and a permit. Check local codes or consult with a structural professional before finalizing plans to ensure your design remains safe and compliant.

Most bump-outs are completed within one to four weeks, even with minimal electrical, plumbing, or HVAC work. Their compact size means less demolition, simpler inspections, and fewer weather-related delays compared to a full-scale addition. Your contractor can provide a more precise timeline once they have determined the scope, materials, and permit schedule, but plan on having the extra square footage ready in approximately a month.

The 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.
built-in outdoor kitchen with grill and sink
Apr 30, 2025
Apr 30, 2025
Budget for outdoor kitchen costs based on factors such as appliances, materials, permits, labor, amenities, kitchen size, customizations, and more.
BLUE TWO STORY HOME
Apr 30, 2025
Apr 30, 2025
Budget for the cost to add a second story based on factors such as size, foundation work, materials, labor, permits, post-construction cleaning, and more.
small bathroom that has been updated in a remodel
Apr 29, 2025
Apr 29, 2025
Budget for the cost to remodel a small bathroom based on factors such as required fixtures, bathroom size, labor, remodel type, site prep, and more.
guest house in the backyard
Apr 27, 2025
Apr 27, 2025
Need to build a guest house? Here’s how much it costs, what factors affect cost, and what to expect.
Kitchen view leading into dining area
Apr 28, 2025
Apr 28, 2025
Use this guide to budget for bump-out addition costs based on factors such as room size, room type, labor, finishes, permits, and more.
House roof with nice window
Apr 28, 2025
Apr 28, 2025
Budget for dormer addition costs based on factors such as roof type, framing, customizations, reinforcement, cladding, labor, and more.
Share project details to get started.