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Find Addition to existing structure builders in Holtsville

Atlantic Shore Builders & Developers

5.00(
3
)
Approved Pro

Atlantic Shore Builders & Developers

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

We are 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. We are watchful of our customer's interests and make their concerns the basis of our business. Give us a call for a quote today!

"Friendly, low price, and best of all the painter, Francisco, is a REAL professional who’s not about doing a slipshod job and leaving. He took as many days as he needed at a flat rate and ensured the job was top quality."

Alexander M on October 2021

We are 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. We are watchful of our customer's interests and make their concerns the basis of our business. Give us a call for a quote today!

"Friendly, low price, and best of all the painter, Francisco, is a REAL professional who’s not about doing a slipshod job and leaving. He took as many days as he needed at a flat rate and ensured the job was top quality."

Alexander M on October 2021


American Home and Design, Inc.

5.00(
23
)
Approved Pro

American Home and Design, Inc.

5.00(
23
)
Approved Pro
Customers say: Quality work
25 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade! We will always do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Call us anytime!

"He has been fantastic!"

Chris P on June 2020

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade! We will always do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Call us anytime!

"He has been fantastic!"

Chris P on June 2020


Avatar for Exterior Team Home Services, Inc.

Exterior Team Home Services, Inc.

4.95(
22
)
Approved Pro

Exterior Team Home Services, Inc.

4.95(
22
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
9 years of experience

Exterior Team Home Services, Inc takes great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Call Exterior Team Home Services, Inc today!

"Ronald and his Team did an excellent job for a very good price. Very professional. Pointed out some things that needed attention and then took care of it. The workmanship and customer service is better than any other craftman I have ever hired. I will keep Exterior Team Home Service number available to recommend to anyone that asks if "I know someone who...." I trust Exterior Team Home and will use them in the future."

Ed S on September 2023

Exterior Team Home Services, Inc takes great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Call Exterior Team Home Services, Inc today!

"Ronald and his Team did an excellent job for a very good price. Very professional. Pointed out some things that needed attention and then took care of it. The workmanship and customer service is better than any other craftman I have ever hired. I will keep Exterior Team Home Service number available to recommend to anyone that asks if "I know someone who...." I trust Exterior Team Home and will use them in the future."

Ed S on September 2023


Kiwi Restorations, LLC

5.00(
2
)
Approved Pro

Kiwi Restorations, LLC

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

We are 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.

"Shane and his crew were fantastic. From our first meeting through completion the renovation was seamless. Great attention to detail, neat, clean and respectful of my house. Finished on time and on budget. Highly recommended."

Mark K on February 2024

We are 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.

"Shane and his crew were fantastic. From our first meeting through completion the renovation was seamless. Great attention to detail, neat, clean and respectful of my house. Finished on time and on budget. Highly recommended."

Mark K on February 2024


DCS Custom Builder, LLC

5.00(
3
)
Approved Pro

DCS Custom Builder, LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
18 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 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!

"I hired DCS to renovate a house for my mother. They had to re-frame walls, move doorways, gut reno 2 bathrooms and the kitchen. They finished the drywall, installed the new tile and cabinets, replaced flooring, and installed a new tile fireplace surround and built a custom wood mantle. Great carpenters. Dick Strine, the principal, is so knowledgeable and thorough. If he can figure out where a problem is coming from in your house, no one can. Great customer service. They have also worked for my in-laws, including building one very large house and renovating another."

Jacqueline P on January 2024

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!

"I hired DCS to renovate a house for my mother. They had to re-frame walls, move doorways, gut reno 2 bathrooms and the kitchen. They finished the drywall, installed the new tile and cabinets, replaced flooring, and installed a new tile fireplace surround and built a custom wood mantle. Great carpenters. Dick Strine, the principal, is so knowledgeable and thorough. If he can figure out where a problem is coming from in your house, no one can. Great customer service. They have also worked for my in-laws, including building one very large house and renovating another."

Jacqueline P on January 2024


Coastal Carpentry Corp.

5.00(
1
)
Approved Pro

Coastal Carpentry Corp.

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

Coastal Carpentry Corp, 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.

"They were very easy to work with and I enjoyed their company."

Chad N on July 2021

Coastal Carpentry Corp, 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.

"They were very easy to work with and I enjoyed their company."

Chad N on July 2021


"Granville House Victorians L.L.C. is extremely skilled and professional. My Victorian style house came out better than I could have dreamed. Granville took care of everything and they are extremely knowledgeable in what they do."

Jonathan P on January 2023

The linkedin site will tell our Story. Clients will take advantage of Granville's in house Design capabilities with CAD. see granvillevictorians.com for examples of our work

"Granville House Victorians L.L.C. is extremely skilled and professional. My Victorian style house came out better than I could have dreamed. Granville took care of everything and they are extremely knowledgeable in what they do."

Jonathan P on January 2023


Avatar for A.S.M. Home Improvements

A.S.M. Home Improvements

5.00(
7
)
Approved Pro

A.S.M. Home Improvements

5.00(
7
)
Approved Pro
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
46 local quotes requested

We are family owned and operated with over 25 years experience remodeling homes. We pride ourselves on offering a quality product and professional service tailored to your needs. Take a look at our previous work and contact us to discuss your next remodeling project today!.

"Anthony is the consummate professional. He worked with us to design a porch that not only looks outstanding but adds curb appeal and value to our home we never could have imagined. He is efficient, neat, completely open to last minute "hey we forgot but could you...", incredibly excellent at everything he does (he's also done for us internal painting, fixed floor planks etc) and most important is that he is just the nicest person with whom to work on home projects. Highly recommend."

judy m on July 2025

We are family owned and operated with over 25 years experience remodeling homes. We pride ourselves on offering a quality product and professional service tailored to your needs. Take a look at our previous work and contact us to discuss your next remodeling project today!.

"Anthony is the consummate professional. He worked with us to design a porch that not only looks outstanding but adds curb appeal and value to our home we never could have imagined. He is efficient, neat, completely open to last minute "hey we forgot but could you...", incredibly excellent at everything he does (he's also done for us internal painting, fixed floor planks etc) and most important is that he is just the nicest person with whom to work on home projects. Highly recommend."

judy m on July 2025


Avatar for Portillo's Carpentry & Demolition

Portillo's Carpentry & Demolition

4.84(
64
)
Approved Pro

Portillo's Carpentry & Demolition

4.84(
64
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
212 local quotes requested

portillo demolition general repairs, maintenance, in business since 2010. Family owned and operated. Painting interior and exterior stall doors windows decking painting power washer pavers driveway fences sealer driveway ceramic work bathroom kitchen fire place stall wood flooring bambú laminates make new bathroom new kitchen few other things.

"This review is long overdue! We had the pleasure of working with Robert on renovating our new house from top to bottom almost a year ago, and we are still thrilled with the results. Their professionalism, attention to detail, and commitment to quality has created a deep trust in Robert. He is top of our list and we have recommended him and his team to all our family and friends. We knew he would be a good fit from the initial consultation. Roberto managed everything with care and great attention to detail. Robert and his team executed our vision so well and everyone who has been over have showered us with compliments at how good everything looks. Throughout the renovation Roberto maintained excellent communication, keeping us updated at every stage. They were always punctual, courteous, and willing to answer any questions we had. His team was respectful of our home and ensured that the worksite was clean and organized at the end of each day. The quality of workmanship has proven to be outstanding and the custom work will last us for years to come. Another impressive aspect of working with Roberto and team was their ability to stay on schedule and within budget. They provided a clear timeline at the beginning of the project and adhered to it, completing the work on time without any unexpected costs. Even after the project was completed, Roberto continued to provide exceptional customer service and followed up to ensure we were satisfied with the work. We highly recommend Roberto to anyone looking for a reliable, skilled, and professional contractor. Our new house is beautiful and suits us perfectly thanks to Roberto and his team!"

TK N on October 2024

portillo demolition general repairs, maintenance, in business since 2010. Family owned and operated. Painting interior and exterior stall doors windows decking painting power washer pavers driveway fences sealer driveway ceramic work bathroom kitchen fire place stall wood flooring bambú laminates make new bathroom new kitchen few other things.

"This review is long overdue! We had the pleasure of working with Robert on renovating our new house from top to bottom almost a year ago, and we are still thrilled with the results. Their professionalism, attention to detail, and commitment to quality has created a deep trust in Robert. He is top of our list and we have recommended him and his team to all our family and friends. We knew he would be a good fit from the initial consultation. Roberto managed everything with care and great attention to detail. Robert and his team executed our vision so well and everyone who has been over have showered us with compliments at how good everything looks. Throughout the renovation Roberto maintained excellent communication, keeping us updated at every stage. They were always punctual, courteous, and willing to answer any questions we had. His team was respectful of our home and ensured that the worksite was clean and organized at the end of each day. The quality of workmanship has proven to be outstanding and the custom work will last us for years to come. Another impressive aspect of working with Roberto and team was their ability to stay on schedule and within budget. They provided a clear timeline at the beginning of the project and adhered to it, completing the work on time without any unexpected costs. Even after the project was completed, Roberto continued to provide exceptional customer service and followed up to ensure we were satisfied with the work. We highly recommend Roberto to anyone looking for a reliable, skilled, and professional contractor. Our new house is beautiful and suits us perfectly thanks to Roberto and his team!"

TK N on October 2024


Avatar for Final Touch Restoration

Final Touch Restoration

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Final Touch Restoration

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
12 local quotes requested
30 years of experience

Final Touch Restoration Specializes in all phases of Remodeling and Restoration services. From Window, Door, Floor, Kitchens, and Bathroom installations to Water, Wind, Mold, Fire, and Smoke remediation to total home cleaning services. There is no project too small or too large for us to handle.

Final Touch Restoration Specializes in all phases of Remodeling and Restoration services. From Window, Door, Floor, Kitchens, and Bathroom installations to Water, Wind, Mold, Fire, and Smoke remediation to total home cleaning services. There is no project too small or too large for us to handle.

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FAQs for addition to existing structure building service projects in Holtsville, NY

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 Holtsville, NY 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.