Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Ronkonkoma, NY

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 Ronkonkoma

Atlantic Shore Builders & Developers

156 East Main Street
5.00(
3
)
•Approved Pro

Atlantic Shore Builders & Developers

156 East Main Street
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.

47 Chestnut Avenue
5.00(
23
)
•Approved Pro

American Home and Design, Inc.

47 Chestnut Avenue
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.

359 North Ocean Avenue Apt. 1
4.95(
22
)
•Approved Pro

Exterior Team Home Services, Inc.

359 North Ocean Avenue Apt. 1
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

Concorde Remodeling, Inc.

8 Lynam Court
4.68(
41
)
•Approved Pro

Concorde Remodeling, Inc.

8 Lynam Court
4.68(
41
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
17 years of experience

We are a locally owned and operated company serving the Long Island area. We are committed to excellence in everything we do. Remodeling is our passion and customer service is our specialty. Please call Concorde Remodeling, Inc., today! *DOES NOT HANDLE INSURANCE CLAIMS *

"I recently had the pleasure of working with Bob from Concorde on the finishing of a basement into an apartment, and I am thrilled with the results. From start to finish, the entire process was handled with remarkable professionalism and attention to detail. **Project Management:** Rob, the project manager, was outstanding. He maintained excellent communication throughout the project, keeping me informed of progress and any potential issues. **Quality of Work:** The quality of work delivered by Concorde was exceptional. Every aspect of the construction was executed to the highest standards, from the foundation to the final touches. **Overall Experience:** Overall, my experience with Concorde was nothing short of excellent. They delivered a high-quality construction project that met all my expectations and more. I highly recommend Concorde for any construction needs and will certainly consider them for future projects."

Chrysanthy P on May 2024

We are a locally owned and operated company serving the Long Island area. We are committed to excellence in everything we do. Remodeling is our passion and customer service is our specialty. Please call Concorde Remodeling, Inc., today! *DOES NOT HANDLE INSURANCE CLAIMS *

"I recently had the pleasure of working with Bob from Concorde on the finishing of a basement into an apartment, and I am thrilled with the results. From start to finish, the entire process was handled with remarkable professionalism and attention to detail. **Project Management:** Rob, the project manager, was outstanding. He maintained excellent communication throughout the project, keeping me informed of progress and any potential issues. **Quality of Work:** The quality of work delivered by Concorde was exceptional. Every aspect of the construction was executed to the highest standards, from the foundation to the final touches. **Overall Experience:** Overall, my experience with Concorde was nothing short of excellent. They delivered a high-quality construction project that met all my expectations and more. I highly recommend Concorde for any construction needs and will certainly consider them for future projects."

Chrysanthy P on May 2024

Coastal Carpentry Corp.

110 Woodcut Drive
5.00(
1
)
•Approved Pro

Coastal Carpentry Corp.

110 Woodcut Drive
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

Kiwi Restorations, LLC

194 Mill Road
5.00(
2
)
•Approved Pro

Kiwi Restorations, LLC

194 Mill Road
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

Avatar for Granville House Victorians L.L.C.

Granville House Victorians L.L.C.

16 Riverdale Ave
5.00(
1
)
•Approved Pro

Granville House Victorians L.L.C.

16 Riverdale Ave
5.00(
1
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
20 years of experience

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

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 HD Renovations

HD Renovations

25-89 44th St
4.73(
101
)
•Approved Pro

HD Renovations

25-89 44th St
4.73(
101
)
•Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
397 local quotes requested

With my years of experience we have mastered in becoming a pro in all interior renovations and specialized in door and frame installation for interior and exterior doors. Kitchen Installation with best outcome results and detailing and bathroom remodeling. Fully licensed and insured!!!

"Dom and his crew were very professional and pleasant to deal with. Strong communication, swift responses throughout, stayed on track with deadlines, and very reliable. The work came out beautifully. I would 100% recommend and hire again for future work."

Matthew R on April 2025

With my years of experience we have mastered in becoming a pro in all interior renovations and specialized in door and frame installation for interior and exterior doors. Kitchen Installation with best outcome results and detailing and bathroom remodeling. Fully licensed and insured!!!

"Dom and his crew were very professional and pleasant to deal with. Strong communication, swift responses throughout, stayed on track with deadlines, and very reliable. The work came out beautifully. I would 100% recommend and hire again for future work."

Matthew R on April 2025

Avatar for ER Construction of LI, Inc.

ER Construction of LI, Inc.

7 Sean Lane
3.00(
2
)
•Approved Pro

ER Construction of LI, Inc.

7 Sean Lane
3.00(
2
)
•Approved Pro
30 years of experience
Free onsite estimate

At ER Construction of LI, Inc., we've built our reputation on rebuilding peoples homes. From the simple to the lavish, we've experienced it all and we can help you every step of the way. We are committed quality work and outstanding results and we are strongly involved in local community activities. We look forward to working with you!Call us today for a quote!

"Provided false references. Took large down payment, didn't purchase a single item. Owes his subs for labor and services completed. Misrepresented himself as a GC. He's roofer and not even a good one. Fired for breach of contract."

Jared M on December 2024

At ER Construction of LI, Inc., we've built our reputation on rebuilding peoples homes. From the simple to the lavish, we've experienced it all and we can help you every step of the way. We are committed quality work and outstanding results and we are strongly involved in local community activities. We look forward to working with you!Call us today for a quote!

"Provided false references. Took large down payment, didn't purchase a single item. Owes his subs for labor and services completed. Misrepresented himself as a GC. He's roofer and not even a good one. Fired for breach of contract."

Jared M on December 2024

...
Showing 1-10 of 969
FAQs for addition to existing structure building service projects in Ronkonkoma, 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 Ronkonkoma, 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.

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.