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Find Addition to existing structure builders in Whippany

Avatar for Joseph & Sons Construction, LLC

Joseph & Sons Construction, LLC

5.00(
145
)
•Approved Pro

Joseph & Sons Construction, LLC

5.00(
145
)
•Approved Pro
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
31 years of experience

Joseph & Sons Construction, LLC, does everything from custom home building and remodeling to small commercial build outs. We offer quality, professionalism and competitive pricing for every job, regardless of project size. Customer satisfaction is our primary goal. Joseph & Sons Construction, LLC, looks forward to making your dream a reality.

"Angelo & team were amazing to work with. From design to implementation, it was a smooth experience. We had the same crew working at our house every day- the guys were friendly, polite, tolerated my 5 year old daughter asking them what they were doing each day (LOL). Their work was top notch- no corners cut. Every day they left my house clean, nothing left out- all materials put away and the rooms were safe for my kids and dog to be in. We couldn’t be happier with the work done. "

jackie l on December 2025

Joseph & Sons Construction, LLC, does everything from custom home building and remodeling to small commercial build outs. We offer quality, professionalism and competitive pricing for every job, regardless of project size. Customer satisfaction is our primary goal. Joseph & Sons Construction, LLC, looks forward to making your dream a reality.

"Angelo & team were amazing to work with. From design to implementation, it was a smooth experience. We had the same crew working at our house every day- the guys were friendly, polite, tolerated my 5 year old daughter asking them what they were doing each day (LOL). Their work was top notch- no corners cut. Every day they left my house clean, nothing left out- all materials put away and the rooms were safe for my kids and dog to be in. We couldn’t be happier with the work done. "

jackie l on December 2025

Avatar for Prestige Design & Build Corp.

Prestige Design & Build Corp.

5.00(
35
)
•Approved Pro

Prestige Design & Build Corp.

5.00(
35
)
•Approved Pro
Customers say: Quick response
5 years of experience
Free onsite estimate

🔨 20+ Years of Experience | Detail-Oriented | Owner-Supervised on Every Project At Prestige, we pride ourselves on delivering craftsmanship you can trust. Whether it’s a small upgrade, a full-scale renovation or a custom new build our team is here to bring your vision to life. ✅ Kitchens, Bathrooms, Basements, Attics, Garages, painting, floors, trims ✅ Whole-House Renovations & Additions ✅ Add-a-Level Projects & New Construction ✅ Licensed & Insured 📲 Call/Text 201-884-3080 or visit www.prestigedesignbuildnj.com to schedule your in-home or phone consultation today. Check out our instagram profile for our projects: https://www.instagram.com/prestige_designbuild/

"Extremely professional with a great eye for detail. Ensures needs are met and very commutative. Respectful and total gentleman. Assisted us to help get the job done right. "

mike K on February 2026

🔨 20+ Years of Experience | Detail-Oriented | Owner-Supervised on Every Project At Prestige, we pride ourselves on delivering craftsmanship you can trust. Whether it’s a small upgrade, a full-scale renovation or a custom new build our team is here to bring your vision to life. ✅ Kitchens, Bathrooms, Basements, Attics, Garages, painting, floors, trims ✅ Whole-House Renovations & Additions ✅ Add-a-Level Projects & New Construction ✅ Licensed & Insured 📲 Call/Text 201-884-3080 or visit www.prestigedesignbuildnj.com to schedule your in-home or phone consultation today. Check out our instagram profile for our projects: https://www.instagram.com/prestige_designbuild/

"Extremely professional with a great eye for detail. Ensures needs are met and very commutative. Respectful and total gentleman. Assisted us to help get the job done right. "

mike K on February 2026

Avatar for Monk's Home Improvements

Monk's Home Improvements

4.80(
533
)
•Approved Pro

Monk's Home Improvements

4.80(
533
)
•Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
19 years of experience

Along with the Monk's Kitchen & Bath Design Studio, we are a full-service home improvement provider. Monk's will help you plan, design, and purchase everything you need for a remodel. Then our expert craftsmen will install everything and our painters will come and complete the job.

"Roberto and his team helped us select, paint, and install a large custom french door for our home office. Roberto understood our vision, made the process simple, and handled the project efficiently. Roberto was quick to respond, and showed up exactly when he said he would to make sure his team was on time and understood what we wanted. We are so happy with the way the door came out, and highly recommend Roberto and his team at Monk's."

Nicole F on January 2026

Along with the Monk's Kitchen & Bath Design Studio, we are a full-service home improvement provider. Monk's will help you plan, design, and purchase everything you need for a remodel. Then our expert craftsmen will install everything and our painters will come and complete the job.

"Roberto and his team helped us select, paint, and install a large custom french door for our home office. Roberto understood our vision, made the process simple, and handled the project efficiently. Roberto was quick to respond, and showed up exactly when he said he would to make sure his team was on time and understood what we wanted. We are so happy with the way the door came out, and highly recommend Roberto and his team at Monk's."

Nicole F on January 2026

Avatar for BUILT-WELL BUILDERS, LLC

BUILT-WELL BUILDERS, LLC

4.95(
143
)
•Approved Pro

BUILT-WELL BUILDERS, LLC

4.95(
143
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
46 years of experience

Built-Well Builders offers services in construction, remodeling, architectural design and interior design to both residential and commercial customers in Northern New Jersey. As a fully licensed and insured company with over 30 years of experience, we have garnered the respect of our clients and homeowners as well as industry professionals. Home buyers today want more out of their home than ever before. They want a creative and innovative home with a unique floor plan. At Built-Well, we understand the needs and desires of today’s home owners and buyers. Our homes, additions, and renovations are designed to suit your individual needs while incorporating style, luxury and convenience. Whether you are thinking of a custom home design, a whole house renovation, or a second story addition, Built-Well is uniquely positioned and qualified to provide attentive, expert service by an experienced, talented team from initial concept through construction.

"Built Well Builders did an outstanding job installing our new kitchen. Their work was meticulous, professional, and exceeded expectations. They handled everything — electrical, plumbing, cabinet installation, tile, sheetrock, and spackling — all with great attention to detail. The plumber solved some complex issues that we uncovered, and the electrical work was exceptionally neat and well-executed. A special shout-out to Grant and Keith, who did a phenomenal job installing our cabinets with true craftsmanship and precision. The kitchen cabinet designer was also excellent, offering a wide variety of styles and incorporating all our design elements perfectly. Best of all, the cabinets were delivered within just two weeks of ordering, keeping our project right on schedule. The team was punctual and left everything spotless each day. We highly recommend Built Well Builders for their professionalism, skill, and quality workmanship! We plan to have them upgrade our bathrooms next ."

Robert S on October 2025

Built-Well Builders offers services in construction, remodeling, architectural design and interior design to both residential and commercial customers in Northern New Jersey. As a fully licensed and insured company with over 30 years of experience, we have garnered the respect of our clients and homeowners as well as industry professionals. Home buyers today want more out of their home than ever before. They want a creative and innovative home with a unique floor plan. At Built-Well, we understand the needs and desires of today’s home owners and buyers. Our homes, additions, and renovations are designed to suit your individual needs while incorporating style, luxury and convenience. Whether you are thinking of a custom home design, a whole house renovation, or a second story addition, Built-Well is uniquely positioned and qualified to provide attentive, expert service by an experienced, talented team from initial concept through construction.

"Built Well Builders did an outstanding job installing our new kitchen. Their work was meticulous, professional, and exceeded expectations. They handled everything — electrical, plumbing, cabinet installation, tile, sheetrock, and spackling — all with great attention to detail. The plumber solved some complex issues that we uncovered, and the electrical work was exceptionally neat and well-executed. A special shout-out to Grant and Keith, who did a phenomenal job installing our cabinets with true craftsmanship and precision. The kitchen cabinet designer was also excellent, offering a wide variety of styles and incorporating all our design elements perfectly. Best of all, the cabinets were delivered within just two weeks of ordering, keeping our project right on schedule. The team was punctual and left everything spotless each day. We highly recommend Built Well Builders for their professionalism, skill, and quality workmanship! We plan to have them upgrade our bathrooms next ."

Robert S on October 2025

Avatar for The TJB Legacy Group, LLC

The TJB Legacy Group, LLC

5.00(
30
)
•Approved Pro

The TJB Legacy Group, LLC

5.00(
30
)
•Approved Pro
Customers say: Quality work
21 years of experience
Free onsite estimate

We're 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 and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. 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!

"Carmelo and his team really raised the bar! They were super responsive, easy to reach, and clearly cared about making sure we were happy every step of the way. Carmelo was flexible with material choices and kept us in the loop with great info and advice while we made decisions. He renovated both of our bathrooms and installed hardwood floors in our living and dining rooms. Each bathroom was done in just two weeks—and they look incredible! The work was top-notch, the price was totally fair, and the whole process was smooth and stress-free. I’ll definitely be hiring Carmelo and his crew again. Couldn’t recommend them more!"

Erika R on October 2025

We're 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 and Kitchen Remodels, but also offer a wide range of expertise for a variety of other projects. 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!

"Carmelo and his team really raised the bar! They were super responsive, easy to reach, and clearly cared about making sure we were happy every step of the way. Carmelo was flexible with material choices and kept us in the loop with great info and advice while we made decisions. He renovated both of our bathrooms and installed hardwood floors in our living and dining rooms. Each bathroom was done in just two weeks—and they look incredible! The work was top-notch, the price was totally fair, and the whole process was smooth and stress-free. I’ll definitely be hiring Carmelo and his crew again. Couldn’t recommend them more!"

Erika R on October 2025

Avatar for JM Contracting Group, LLC

JM Contracting Group, LLC

4.87(
71
)
•Approved Pro

JM Contracting Group, LLC

4.87(
71
)
•Approved Pro
Super Service Award
Customers say: Quality work
7 years of experience
Free onsite estimate

For 40 years JM Contracting Group LLC has been 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.

"JM did a fantastic job. About 13 years ago, while living at our previous residence: JM remodeled and modernized our full Kitchen, two full bathrooms and, after many tries by other contractors, he was able to stop a leak from our roof at no charge. About 10 years ago, at our current residence , JM remodeled and modernized our full kitchen and did a unique job of updating 4 large sliding closet doors. He removed the cheap inserts, and replaced them with 1/4” high quality plywood into the frames. He then, using wood molding, he made the face of the doors look like real wood doors. Doors were stained and look like expensive oak doors! JM comes up with excellent suggestions, alternatives, and expense saving ideas. We plan on relying on his expertise when we’re ready to upgrade our Patio. All the best to JM Group!"

Joseph P on November 2025

For 40 years JM Contracting Group LLC has been 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.

"JM did a fantastic job. About 13 years ago, while living at our previous residence: JM remodeled and modernized our full Kitchen, two full bathrooms and, after many tries by other contractors, he was able to stop a leak from our roof at no charge. About 10 years ago, at our current residence , JM remodeled and modernized our full kitchen and did a unique job of updating 4 large sliding closet doors. He removed the cheap inserts, and replaced them with 1/4” high quality plywood into the frames. He then, using wood molding, he made the face of the doors look like real wood doors. Doors were stained and look like expensive oak doors! JM comes up with excellent suggestions, alternatives, and expense saving ideas. We plan on relying on his expertise when we’re ready to upgrade our Patio. All the best to JM Group!"

Joseph P on November 2025

Avatar for Garden State Home Remodeling

Garden State Home Remodeling

5.00(
26
)
•Approved Pro

Garden State Home Remodeling

5.00(
26
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
27 years of experience

Garden State Home Remodeling is a family owned and operated full service remodeling and renovation company! We offer complete home services with 20+ years of remodeling experience. We have an experienced team who specializes in Roofing Replacement, Vinyl Siding and Insulation, Replacement Windows, Masonry Walkways and Patios, Stone and Brick face, Kitchen and Bathroom Renovations, and more. Our company also offers 100% Financing that has various different programs tailored to your budget and needs. Garden State Home Remodeling is licensed and fully insured in New Jersey and parts of New York to operate as a home remodeling company. Our licenses include The New Jersey Department of Banking and Insurance, and a registration with The New Jersey and New York Division of Consumer Affairs. We respectfully ask when scheduling an estimate that all homeowners be present. Our reasoning is due to our estimates being concise, descriptive, and hopefully educational in the home remodeling field. We feel when researching a home improvement contractor, allowing us to interact and provide information to all parties involved works best! Thank you for giving Garden State Home Remodeling the opportunity to be considered as your next home improvement specialist! We will work hard to earn your business and look forward to servicing you on your next home project!

"If I could give them 10 stars I would. I had Garden State Home Remodeling come to pave my old torn up driveway and yard space and replace with asphalt. This was my first major home project and I was really nervous. Kelvin walked me thru the entire process from beginning to end. Kelvin was so professional and answered every question I had. Everything I asked for was done over and beyond. The crew did an excellent job on my driveway/yard. I’m more than happy and will use their services again!"

Annette W on June 2022

Garden State Home Remodeling is a family owned and operated full service remodeling and renovation company! We offer complete home services with 20+ years of remodeling experience. We have an experienced team who specializes in Roofing Replacement, Vinyl Siding and Insulation, Replacement Windows, Masonry Walkways and Patios, Stone and Brick face, Kitchen and Bathroom Renovations, and more. Our company also offers 100% Financing that has various different programs tailored to your budget and needs. Garden State Home Remodeling is licensed and fully insured in New Jersey and parts of New York to operate as a home remodeling company. Our licenses include The New Jersey Department of Banking and Insurance, and a registration with The New Jersey and New York Division of Consumer Affairs. We respectfully ask when scheduling an estimate that all homeowners be present. Our reasoning is due to our estimates being concise, descriptive, and hopefully educational in the home remodeling field. We feel when researching a home improvement contractor, allowing us to interact and provide information to all parties involved works best! Thank you for giving Garden State Home Remodeling the opportunity to be considered as your next home improvement specialist! We will work hard to earn your business and look forward to servicing you on your next home project!

"If I could give them 10 stars I would. I had Garden State Home Remodeling come to pave my old torn up driveway and yard space and replace with asphalt. This was my first major home project and I was really nervous. Kelvin walked me thru the entire process from beginning to end. Kelvin was so professional and answered every question I had. Everything I asked for was done over and beyond. The crew did an excellent job on my driveway/yard. I’m more than happy and will use their services again!"

Annette W on June 2022

Giove Renovations

4.93(
21
)
•Approved Pro

Giove Renovations

4.93(
21
)
•Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
22 years of experience

We're 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, bathroom remodels, and kitchen remodels, but also offer a wide range of expertise for a variety of other projects. 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!

"Giove Renovations put in a new kitchen, bathroom and master bedroom closet for me Their work is amazing. They are reliable and trustworthy."

Nancy M on April 2023

We're 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, bathroom remodels, and kitchen remodels, but also offer a wide range of expertise for a variety of other projects. 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!

"Giove Renovations put in a new kitchen, bathroom and master bedroom closet for me Their work is amazing. They are reliable and trustworthy."

Nancy M on April 2023

Avatar for American Home Remodeling Inc

American Home Remodeling Inc

4.85(
473
)
•Approved Pro

American Home Remodeling Inc

4.85(
473
)
•Approved Pro
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
32 years of experience

American Home Remodeling is a family owned and operated full service remodeling and renovation company. You will work directly with an owner from the initial estimate process to the completion of your job! We offer complete home services with over 40 years of remodeling experience. We have completed thousands of projects with one simple goal: quality workmanship and great prices. We have an experienced team who specialize in premium product lines for roofing replacement, Vinyl siding and insulation, replacement windows, masonry walkways and patios, stone and brick face, kitchen and bathroom renovations, and more. We offer 100% Financing with various different programs tailored to your budget and needs. At American Home we take great pride in our work and are completely committed to customer satisfaction! American Home Remodeling is licensed and fully insured in New Jersey and parts of New York to operate as a home remodeling company. Our licenses include The New Jersey Department of Banking and Insurance, and a registration with The New Jersey, New York, and Connecticut Division of Consumer Affairs. We respectfully ask when scheduling an estimate that all homeowners please be present. Our reasoning is due to our estimates being concise, descriptive, and hopefully educational in the home remodeling field. We feel when researching a home improvement contractor, allowing us to interact and provide information to all parties involved works best! Thank you for giving American Home Remodeling the opportunity to be considered as your next home improvement specialist! We will work hard to earn your business and look forward to servicing you on your next home project!

"American Home replaced my roof and siding, porch windows and some add-on exterior lighting. One of the reasons I chose AHR was not just due to the best price, they came in line with other estimates I received, but because they included things with their final price that similar companies had as add-ons at an extra cost such as the dumpster and gutter system. I did not know what to expect as this was the first time I've had these things replaced. My rep John was awesome, he was professional, friendly and accommodating, and was able to work with me on the spot vs. "I have to check back to the owners" which I got from other companies. John was readily available by phone, text, and in person. He walked me through all the steps, timelines, and the whole process. After the crew finished, he took my list of 'nit-pick' things and made sure they were addressed. Overall I am satisfied with the job, In fact, we recommended them to our neighbors who hired them to do their siding this Spring."

Paul G on March 2024

American Home Remodeling is a family owned and operated full service remodeling and renovation company. You will work directly with an owner from the initial estimate process to the completion of your job! We offer complete home services with over 40 years of remodeling experience. We have completed thousands of projects with one simple goal: quality workmanship and great prices. We have an experienced team who specialize in premium product lines for roofing replacement, Vinyl siding and insulation, replacement windows, masonry walkways and patios, stone and brick face, kitchen and bathroom renovations, and more. We offer 100% Financing with various different programs tailored to your budget and needs. At American Home we take great pride in our work and are completely committed to customer satisfaction! American Home Remodeling is licensed and fully insured in New Jersey and parts of New York to operate as a home remodeling company. Our licenses include The New Jersey Department of Banking and Insurance, and a registration with The New Jersey, New York, and Connecticut Division of Consumer Affairs. We respectfully ask when scheduling an estimate that all homeowners please be present. Our reasoning is due to our estimates being concise, descriptive, and hopefully educational in the home remodeling field. We feel when researching a home improvement contractor, allowing us to interact and provide information to all parties involved works best! Thank you for giving American Home Remodeling the opportunity to be considered as your next home improvement specialist! We will work hard to earn your business and look forward to servicing you on your next home project!

"American Home replaced my roof and siding, porch windows and some add-on exterior lighting. One of the reasons I chose AHR was not just due to the best price, they came in line with other estimates I received, but because they included things with their final price that similar companies had as add-ons at an extra cost such as the dumpster and gutter system. I did not know what to expect as this was the first time I've had these things replaced. My rep John was awesome, he was professional, friendly and accommodating, and was able to work with me on the spot vs. "I have to check back to the owners" which I got from other companies. John was readily available by phone, text, and in person. He walked me through all the steps, timelines, and the whole process. After the crew finished, he took my list of 'nit-pick' things and made sure they were addressed. Overall I am satisfied with the job, In fact, we recommended them to our neighbors who hired them to do their siding this Spring."

Paul G on March 2024

Avatar for Inson Dubois Wood LLC

Inson Dubois Wood LLC

5.00(
12
)
•Approved Pro

Inson Dubois Wood LLC

5.00(
12
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
21 years of experience

Full Service Residential Design Firm that focuses on full transparency and meeting our clients budget and timeline. Impeccable attention to detail and cost analysis are our strong point. A full design team takes your project from inception to completion in record time.

"Inson is a creative genius with a superb eye. He did everything with meticulous detail and completely transformed our apartment into an amazing, gorgeous home. We enjoy entertaining, and our friends love coming over, always remarking how beautiful and inviting our home is- and that was exactly what we wanted, except Inson brilliantly upgraded our concept, within budget and on time (even with our aggressive timeline because we needed to be out of our old place and into our new within months!). Inson’s team was also great to work with - always polite and professional. We highly recommend Inson and plan on working with him again on our Hamptons home!"

Sandy T on November 2021

Full Service Residential Design Firm that focuses on full transparency and meeting our clients budget and timeline. Impeccable attention to detail and cost analysis are our strong point. A full design team takes your project from inception to completion in record time.

"Inson is a creative genius with a superb eye. He did everything with meticulous detail and completely transformed our apartment into an amazing, gorgeous home. We enjoy entertaining, and our friends love coming over, always remarking how beautiful and inviting our home is- and that was exactly what we wanted, except Inson brilliantly upgraded our concept, within budget and on time (even with our aggressive timeline because we needed to be out of our old place and into our new within months!). Inson’s team was also great to work with - always polite and professional. We highly recommend Inson and plan on working with him again on our Hamptons home!"

Sandy T on November 2021

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FAQs for addition to existing structure building service projects in Whippany, NJ

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Whippany, NJ 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.

See all articles