Top-rated second story addition builders.

Get matched with top second story addition builders in Allentown, NJ

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.

Find Second story addition builders in Allentown

Avatar for Basic Basement Co

Basic Basement Co

122 Park Ave
4.83(
316
)
•Approved Pro

Basic Basement Co

122 Park Ave
4.83(
316
)
•Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
31 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 used The Basic Basement Co. to get our basement finished. They exceeded our expectations, getting the job done quickly. They sent expert workers and worked around our vacation. We were told what they needed to do, they came and did it. Payment was in 4 installments."

Michele G on September 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 used The Basic Basement Co. to get our basement finished. They exceeded our expectations, getting the job done quickly. They sent expert workers and worked around our vacation. We were told what they needed to do, they came and did it. Payment was in 4 installments."

Michele G on September 2025

Avatar for A Hubert Construction

A Hubert Construction

938 Bethel Church
4.65(
94
)
•Approved Pro

A Hubert Construction

938 Bethel Church
4.65(
94
)
•Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
130 local quotes requested

Design/ Build General Contractor (Not a handy man )Call (732-673-8205) or email at Arthur@ahubertconstruction.com for your complete Design /Build Addition, Kitchen Bathroom, Plans Permits and much more. We offer personalized in-home consultation and preferred scheduling for your project! Additions, A Hubert Construction has 38+ years experience in the remodeling and construction industry. Our goal is to deliver exceptional craftsmanship, precise project management with unsurpassed customer service, delivering the results of your dreams - on time and on budget. Whether you are thinking of a small project, complete renovation, Architectural Plans, permits with Turn Key Project for Additions, Kitchens, Bathroom's, Basements, windows doors trim interior exterior living areas outside kitchens, fireplaces with roofs above. Your project will receive professional supervision, attention to detail, and design input rarely found in our field. We bring a common sense approach to sustainability, focusing on getting you the most benefits at little or no additional cost. PLEASE EMAIL US FOR A FAST, EFFICIENT RESPONSE: arthur@ahubertconstruction.com. We believe that open, on-going and unhindered communication is pivotal to a successful project and happy clients.

"We had a great experience with Hubert Construction. They combined two bedroom to create an In-law suite with bedroom, living room and bathroom for our Mom. They also installed two replacement windows and an egress window in our basement. They guys were not only respectful of our home and clean, they were pleasant to be around all day as I work from home. They were great with my dogs, making sure they were careful when coming in an out of the house so the dogs didn’t slip out. They were very honest during the estimate and quote process and explained options and their costs."

Lauren M on January 2020

Design/ Build General Contractor (Not a handy man )Call (732-673-8205) or email at Arthur@ahubertconstruction.com for your complete Design /Build Addition, Kitchen Bathroom, Plans Permits and much more. We offer personalized in-home consultation and preferred scheduling for your project! Additions, A Hubert Construction has 38+ years experience in the remodeling and construction industry. Our goal is to deliver exceptional craftsmanship, precise project management with unsurpassed customer service, delivering the results of your dreams - on time and on budget. Whether you are thinking of a small project, complete renovation, Architectural Plans, permits with Turn Key Project for Additions, Kitchens, Bathroom's, Basements, windows doors trim interior exterior living areas outside kitchens, fireplaces with roofs above. Your project will receive professional supervision, attention to detail, and design input rarely found in our field. We bring a common sense approach to sustainability, focusing on getting you the most benefits at little or no additional cost. PLEASE EMAIL US FOR A FAST, EFFICIENT RESPONSE: arthur@ahubertconstruction.com. We believe that open, on-going and unhindered communication is pivotal to a successful project and happy clients.

"We had a great experience with Hubert Construction. They combined two bedroom to create an In-law suite with bedroom, living room and bathroom for our Mom. They also installed two replacement windows and an egress window in our basement. They guys were not only respectful of our home and clean, they were pleasant to be around all day as I work from home. They were great with my dogs, making sure they were careful when coming in an out of the house so the dogs didn’t slip out. They were very honest during the estimate and quote process and explained options and their costs."

Lauren M on January 2020

Avatar for D & S Landscaping Inc

D & S Landscaping Inc

120 Alfred St
4.42(
200
)
•Approved Pro

D & S Landscaping Inc

120 Alfred St
4.42(
200
)
•Approved Pro
Customers say: Quality work
889 local quotes requested
36 years of experience

Super Service Award winning company on Angi, D&S Landscaping Inc started operating in 1989 and has 35 years of experience in the landscaping, construction and maintenance business. We employ approximately sixteen full time professionals. We service both residential and commercial clients. Our commitment has always been to provide our clients with the highest quality & professional service that exceeds their expectations at affordable prices. This is what makes D&S Landscaping Inc. the obvious choice. Locally owned & operated. Angie's List Super Service Award 2008-2020, 2022, 2023, 2024

"The landscaping of my home needed to be redone. I interviewed a number of Landscapers but after I spoke with Don of D&S Landscaping, Inc., I didn’t contact anyone else. Don told me which shrubs to keep and which to remove. He did a quick sketch of plants he would recommend that would do well in my yard. He showed me pictures of the plants and gave me a very fair written estimate of the cost. He asked for a reasonable deposit and we scheduled a date for the work to be done. He started when he said he would and finished on the same day. His crew is wonderful, polite and very hardworking. They worked from the time they arrived in the morning until early evening adding the unexpected bonus of mowing the back and front yard. Don checked to see that everything was done correctly and to see if I was satisfied. The front looks wonderful and I am more than just satisfied. I would recommend D&S to anyone looking for someone to do landscaping. You won’t be sorry it you do!"

Carole S on October 2024

Super Service Award winning company on Angi, D&S Landscaping Inc started operating in 1989 and has 35 years of experience in the landscaping, construction and maintenance business. We employ approximately sixteen full time professionals. We service both residential and commercial clients. Our commitment has always been to provide our clients with the highest quality & professional service that exceeds their expectations at affordable prices. This is what makes D&S Landscaping Inc. the obvious choice. Locally owned & operated. Angie's List Super Service Award 2008-2020, 2022, 2023, 2024

"The landscaping of my home needed to be redone. I interviewed a number of Landscapers but after I spoke with Don of D&S Landscaping, Inc., I didn’t contact anyone else. Don told me which shrubs to keep and which to remove. He did a quick sketch of plants he would recommend that would do well in my yard. He showed me pictures of the plants and gave me a very fair written estimate of the cost. He asked for a reasonable deposit and we scheduled a date for the work to be done. He started when he said he would and finished on the same day. His crew is wonderful, polite and very hardworking. They worked from the time they arrived in the morning until early evening adding the unexpected bonus of mowing the back and front yard. Don checked to see that everything was done correctly and to see if I was satisfied. The front looks wonderful and I am more than just satisfied. I would recommend D&S to anyone looking for someone to do landscaping. You won’t be sorry it you do!"

Carole S on October 2024

Avatar for TRI-STATE BUILDING SPECIALTIES, INC.

TRI-STATE BUILDING SPECIALTIES, INC.

845 Towbin Ave
4.27(
11
)
•Approved Pro

TRI-STATE BUILDING SPECIALTIES, INC.

845 Towbin Ave
4.27(
11
)
•Approved Pro
Customers say: True professional
280 local quotes requested
34 years of experience

Expand your living space with our expert sunroom and patio enclosure remodeling services! We specialize in designing and transforming outdoor areas into beautiful, functional sunrooms and enclosed patios that you can enjoy year-round. Our skilled team delivers high-quality craftsmanship, using durable materials and personalized designs to enhance your home’s comfort and value. Whether you’re looking to create a cozy sunroom or a versatile patio enclosure, we’re committed to making your vision a reality. Contact us today for a free consultation and start planning your dream space!

"First meeting went very smoothly so far had a great experience with Jason Now will be working with Don the project manager."

Dee A on February 2025

Expand your living space with our expert sunroom and patio enclosure remodeling services! We specialize in designing and transforming outdoor areas into beautiful, functional sunrooms and enclosed patios that you can enjoy year-round. Our skilled team delivers high-quality craftsmanship, using durable materials and personalized designs to enhance your home’s comfort and value. Whether you’re looking to create a cozy sunroom or a versatile patio enclosure, we’re committed to making your vision a reality. Contact us today for a free consultation and start planning your dream space!

"First meeting went very smoothly so far had a great experience with Jason Now will be working with Don the project manager."

Dee A on February 2025

Avatar for Nicopal Construction

Nicopal Construction

111 Town Square Place
4.87(
67
)
•Approved Pro

Nicopal Construction

111 Town Square Place
4.87(
67
)
•Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
503 local quotes requested

Nicopal Construction is a locally owned and operated business serving the North New Jersey area. We offer a wide range of home improvement services and have over 25 years of experience. We combine quality materials with expert installation to complete your project to 100 percent satisfaction. On our initial visit we can offer design ideas and give exact costs. If you feel it’s a good fit you move forward. We are Not a high pressured company. We understand comfort levels . Financing available.

"Vince and his team were absolutely amazing! Everything looks great, and they got it all done so quickly for us. I will definitely be hiring them again for any future contracting work. Can’t speak highly enough about Vince, Roy, and the rest of the team. Thank you guys so much!"

Alexia C on September 2025

Nicopal Construction is a locally owned and operated business serving the North New Jersey area. We offer a wide range of home improvement services and have over 25 years of experience. We combine quality materials with expert installation to complete your project to 100 percent satisfaction. On our initial visit we can offer design ideas and give exact costs. If you feel it’s a good fit you move forward. We are Not a high pressured company. We understand comfort levels . Financing available.

"Vince and his team were absolutely amazing! Everything looks great, and they got it all done so quickly for us. I will definitely be hiring them again for any future contracting work. Can’t speak highly enough about Vince, Roy, and the rest of the team. Thank you guys so much!"

Alexia C on September 2025

Avatar for National Home Improvements

National Home Improvements

534 Boulevard
4.82(
230
)
•Approved Pro

National Home Improvements

534 Boulevard
4.82(
230
)
•Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
1542 local quotes requested

National Home Improvements specializes in the installation windows, roofing and siding. We are a licensed general contractor in custom renovations, additions remodeling bathrooms and kitchens in New Jersey.. The reputation of quality has named NHI, the choice for custom home improvements. We provide personal attention, create designs that suit your lifestyle and work with the finest materials to make your project a reality. National Home Improvements is family owned with over 20 years of experience. We are built on five pillars: Honesty, Integrity, Customer Satisfaction, Innovation, and Competitive Pricing. The on-going focus has been on customer satisfaction. Additional Email - jbartz@nationalhomeimprovements.com .

"Contacted National Home Improvements regarding leaking patio roof and no follow up response to issue since last year of April 2023. Still awaiting to hear back. Seems like the rain gutter is sagging in the middle of the patio where the two joints meet and water is pooling there and possibly leaking through the seams as illustrated in the photo. Poor design concept. Really disappointed with customer service and quality of product especially for what we have paid for. They clearly don't care about taking care of their customers. I would never hire National Home Improvements again!!!"

Greg S on December 2024

National Home Improvements specializes in the installation windows, roofing and siding. We are a licensed general contractor in custom renovations, additions remodeling bathrooms and kitchens in New Jersey.. The reputation of quality has named NHI, the choice for custom home improvements. We provide personal attention, create designs that suit your lifestyle and work with the finest materials to make your project a reality. National Home Improvements is family owned with over 20 years of experience. We are built on five pillars: Honesty, Integrity, Customer Satisfaction, Innovation, and Competitive Pricing. The on-going focus has been on customer satisfaction. Additional Email - jbartz@nationalhomeimprovements.com .

"Contacted National Home Improvements regarding leaking patio roof and no follow up response to issue since last year of April 2023. Still awaiting to hear back. Seems like the rain gutter is sagging in the middle of the patio where the two joints meet and water is pooling there and possibly leaking through the seams as illustrated in the photo. Poor design concept. Really disappointed with customer service and quality of product especially for what we have paid for. They clearly don't care about taking care of their customers. I would never hire National Home Improvements again!!!"

Greg S on December 2024

Avatar for Riverside Construction & Remodeling, LLC

Riverside Construction & Remodeling, LLC

83 Irons Street
4.83(
6
)
•Approved Pro

Riverside Construction & Remodeling, LLC

83 Irons Street
4.83(
6
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
546 local quotes requested

Riverside Construction & Remodeling, LLC is a full-service, licensed construction company. We specialize in remodeling kitchens and baths and are capable of servicing all of your construction needs. Over the years we have built, maintained and remodeled hundreds of residential properties. We are experienced in projects of every size, from minor repairs and renovations to major projects. We are proud to be your one stop construction company. All of our clients receive personalized service from our staff. We are confident that given the opportunity you will find Riverside Construction & Remodeling, LLC to be a valuable partner. Our passion for excellence is the key to us delivering your project on time and within budget. We would welcome the opportunity to meet with you for any upcoming projects or repairs that you may have. Please feel free to give us a call with any questions or visit our website. www.riversidellcnj.com

"Excellent work, workers always showed up on time. If I had any questions even on weekends Gary always answered his phone. My wife was happy and that is what counts. If I needed any other work I would call Gary because I trust him to do the job correctly at a fare price."

Rich G on February 2025

Riverside Construction & Remodeling, LLC is a full-service, licensed construction company. We specialize in remodeling kitchens and baths and are capable of servicing all of your construction needs. Over the years we have built, maintained and remodeled hundreds of residential properties. We are experienced in projects of every size, from minor repairs and renovations to major projects. We are proud to be your one stop construction company. All of our clients receive personalized service from our staff. We are confident that given the opportunity you will find Riverside Construction & Remodeling, LLC to be a valuable partner. Our passion for excellence is the key to us delivering your project on time and within budget. We would welcome the opportunity to meet with you for any upcoming projects or repairs that you may have. Please feel free to give us a call with any questions or visit our website. www.riversidellcnj.com

"Excellent work, workers always showed up on time. If I had any questions even on weekends Gary always answered his phone. My wife was happy and that is what counts. If I needed any other work I would call Gary because I trust him to do the job correctly at a fare price."

Rich G on February 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
1041 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 ETC Home Improvement

ETC Home Improvement

372 Bath Ave
4.80(
214
)
•Approved Pro

ETC Home Improvement

372 Bath Ave
4.80(
214
)
•Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
1421 local quotes requested

Our company offers all types of home remodeling from new floors, to kitchens, baths and full additions. We have several professionals who work on different aspects of the renovation.

"We highly recommend Eddie Costa home improvement. They were very professional. Staff was very polite. The work was done in a day for a complete roof replacement. We are very pleased with the work we highly recommend them we will hire them again. We were so pleased. We were so pleased we’re having them do more work for us. Thanks again etc home improvement, staff. CN"

Carmen N on October 2023

Our company offers all types of home remodeling from new floors, to kitchens, baths and full additions. We have several professionals who work on different aspects of the renovation.

"We highly recommend Eddie Costa home improvement. They were very professional. Staff was very polite. The work was done in a day for a complete roof replacement. We are very pleased with the work we highly recommend them we will hire them again. We were so pleased. We were so pleased we’re having them do more work for us. Thanks again etc home improvement, staff. CN"

Carmen N on October 2023

Avatar for TQ Contracting LLC

TQ Contracting LLC

40 Eliot Road
4.91(
53
)
•Approved Pro

TQ Contracting LLC

40 Eliot Road
4.91(
53
)
•Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
895 local quotes requested

My name is Tom Quinn from TQ Contracting LLC. We have been serving our customers for 15 years out of Monmouth County NJ. I personally do all our work on all our jobs with the help of my crew. We do not use subcontractors. We provide quality work at affordable rates. We provide services in all aspects of home improvements, remodeling, and renovations. Some of our services include kitchen remodeling, bathroom remodeling, basements, roofing, siding, additions, framing, drywall,painting, and moldings.

"Tom and his crew did a beautiful job. Everything was done professionally and showed great attention to detail. I highly recommend TQ Contracting. The bathroom came out better than I envisioned."

Al G on August 2024

My name is Tom Quinn from TQ Contracting LLC. We have been serving our customers for 15 years out of Monmouth County NJ. I personally do all our work on all our jobs with the help of my crew. We do not use subcontractors. We provide quality work at affordable rates. We provide services in all aspects of home improvements, remodeling, and renovations. Some of our services include kitchen remodeling, bathroom remodeling, basements, roofing, siding, additions, framing, drywall,painting, and moldings.

"Tom and his crew did a beautiful job. Everything was done professionally and showed great attention to detail. I highly recommend TQ Contracting. The bathroom came out better than I envisioned."

Al G on August 2024

...
Showing 1-10 of 963
FAQs for second story addition building service projects in Allentown, NJ

For many homeowners, building up is worth the expense because it provides the extra bedrooms or living areas that can’t be accommodated within the existing footprint. A larger, updated home often commands a higher resale price, recouping a sizable share of the project cost while allowing you to stay in the neighborhood you love. Run the numbers with a real estate agent and contractor to ensure the expected return and day-to-day benefits align with your goals.

Whether it makes more sense to build up or out depends on your lot, budget, and local code. Building up preserves yard space and involves less foundation work, but you may need to vacate the home during construction. Building out avoids staircases and can proceed while you stay put; however, it encroaches on the yard and may face setback limits. Compare both options with your contractor before making a decision.

A structural engineer will first inspect the existing foundation for cracks, footings, and load capacity. Depending on the findings, the crew may pour new concrete footings, install steel or concrete piers, add reinforced beams, or tie additional rebar into the slab. These upgrades redistribute the weight of the new floor and bring the structure up to code. Your contractor will outline the specific reinforcement plan and timeline once the engineering report is complete.

The Allentown, NJ homeowners’ guide to second story addition building services

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

See all articles
  • 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.