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Addition to existing structure builders in Ossining

Avatar for JLR Design And Building Consultants, LLC

JLR Design And Building Consultants, LLC

2777 Schley Avenue, Unit 3A
5.00(
5
)
Approved Pro

JLR Design And Building Consultants, LLC

2777 Schley Avenue, Unit 3A
5.00(
5
)
Approved Pro
Customers say: Quick response
4 years of experience
Free onsite estimate

At JLR Design And Building Consultants, LLC we pride ourselves on being the best Additions and Remodels company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"JLR Design And Building Consultants, LLC was the best. thanks so much,"

Aaron N on August 2025

At JLR Design And Building Consultants, LLC we pride ourselves on being the best Additions and Remodels company in the area. We've built an excellent reputation for customer satisfaction by providing quick estimates, a great attention to detail, and competitive pricing. Being a screened and approved professional gives you the peace of mind you need to allow us to give your home the attention it deserves. Call us today and let's get started!

"JLR Design And Building Consultants, LLC was the best. thanks so much,"

Aaron N on August 2025


Avatar for Talo Architect

Talo Architect

700 Scarsdale Ave 2D
5.00(
3
)
Approved Pro

Talo Architect

700 Scarsdale Ave 2D
5.00(
3
)
Approved Pro
Customers say: Quick response
41 years of experience
Free onsite estimate

At Talo Architect, our focus is on the highest quality residential homes and additions in addition to commercial High Rise sector. Get in touch with us today. We are based in the New York Metropolitan area and operate globally. Together with cutting edge engineers and consultants, on time delivery and cost control is our first priority. We operate on virtual CAD 3D. From the earliest moment, our clients can view the design in real-time, as it evolves in 3D. If required, individual milestones are captured as required in traditional model and brochure formats for publications and meetings with investors, etc. Along with this feature, up-to-date cost estimates can be printed at any time with individual line items. We look forward to earning your business!

"If I could give Talo 10 stars I would. He was incredibly fast and efficient. He listens to your every detail and what he designed was identical to what I envisioned. The price was right and I will totally be coming back for all my architect needs."

Michael E on May 2025

At Talo Architect, our focus is on the highest quality residential homes and additions in addition to commercial High Rise sector. Get in touch with us today. We are based in the New York Metropolitan area and operate globally. Together with cutting edge engineers and consultants, on time delivery and cost control is our first priority. We operate on virtual CAD 3D. From the earliest moment, our clients can view the design in real-time, as it evolves in 3D. If required, individual milestones are captured as required in traditional model and brochure formats for publications and meetings with investors, etc. Along with this feature, up-to-date cost estimates can be printed at any time with individual line items. We look forward to earning your business!

"If I could give Talo 10 stars I would. He was incredibly fast and efficient. He listens to your every detail and what he designed was identical to what I envisioned. The price was right and I will totally be coming back for all my architect needs."

Michael E on May 2025


MC Squared Renovations

14 Edgewood Terrace
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

MC Squared Renovations

14 Edgewood Terrace
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
9 years of experience
Free onsite estimate

MC Squared Renovations 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.

MC Squared Renovations 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.


EJ Squared, Inc.

177 Ash Burton Avenue
5.00(
4
)
Approved Pro

EJ Squared, Inc.

177 Ash Burton Avenue
5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
40 years of experience

At EJ Squared, Inc., we are a well established business in Yonkers offering the finest in craftsmanship and quality. When it comes to professionalism and customer service, we are unmatched in the region. For the best of the best, call today for a free estimate on your next project. We would love to add you to our list of satisfied customers!

"Jorge was attentive, thorough and accessible. Our floors look great!"

Todd T on July 2023

At EJ Squared, Inc., we are a well established business in Yonkers offering the finest in craftsmanship and quality. When it comes to professionalism and customer service, we are unmatched in the region. For the best of the best, call today for a free estimate on your next project. We would love to add you to our list of satisfied customers!

"Jorge was attentive, thorough and accessible. Our floors look great!"

Todd T on July 2023


Avatar for JR General Contractor, LLC

JR General Contractor, LLC

22 Olive Street
4.83(
15
)
Approved Pro

JR General Contractor, LLC

22 Olive Street
4.83(
15
)
Approved Pro
Customers say: Quick response
15 years of experience
Free onsite estimate

JR General Contractor LLC, is committed to excellence 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.

"Yes they did an excellent job"

Louise R on May 2025

JR General Contractor LLC, is committed to excellence 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.

"Yes they did an excellent job"

Louise R on May 2025


Avatar for American Pioneer Construction

American Pioneer Construction

185 Cortlandt St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

American Pioneer Construction

185 Cortlandt St
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
32 years of experience
Free onsite estimate

I founded American Pioneer Construction in July 1993 to give my customers top quality design and installation in a timely manner and at a fair and competitive price. Our goal is to help you create your dreams.We are fully licensed in Westchester and Putnam counties in New York. We have a multi million dollar insurance policy which has never been used in 30 years. The reason is that cleanliness and safety are our top priorities. We are on site every day until the job is completed. We have massive experience in indoor and outdoor renovations for your home. Indoors includes kitchens, bathrooms, basements, doors, windows, moldings, additions, and custom cabinet and shelving units of any size. Also, outdoors we build decks, covered porches, walkways, patios, and fire pits. We have built over 300 Koi ponds that have been featured in international magazines and huge pond tours. We also frame/build garages,sheds, and outdoor bars. Give us a call so you can find out how we can help you.

I founded American Pioneer Construction in July 1993 to give my customers top quality design and installation in a timely manner and at a fair and competitive price. Our goal is to help you create your dreams.We are fully licensed in Westchester and Putnam counties in New York. We have a multi million dollar insurance policy which has never been used in 30 years. The reason is that cleanliness and safety are our top priorities. We are on site every day until the job is completed. We have massive experience in indoor and outdoor renovations for your home. Indoors includes kitchens, bathrooms, basements, doors, windows, moldings, additions, and custom cabinet and shelving units of any size. Also, outdoors we build decks, covered porches, walkways, patios, and fire pits. We have built over 300 Koi ponds that have been featured in international magazines and huge pond tours. We also frame/build garages,sheds, and outdoor bars. Give us a call so you can find out how we can help you.


Avatar for Peter Torres

Peter Torres

790 Delano Road
4.63(
64
)
Approved Pro

Peter Torres

790 Delano Road
4.63(
64
)
Approved Pro
Customers say: True professional
44 local quotes requested
17 years of experience

True home remodeling from big jobs to small we do!!! it all kitchens, bathrooms, painting, power washing, and repairs. with over 40 years experience you know the job will get done right! call us today! . . . . True Home Inspections With over 1,000 home inspections under our belt and our construction experience we are one of the most experienced home inspections companies out there. From small units to large homes we have inspected every type of building. We guarantee a 24 hour inspections report turn around for your convenience call us and schedule your inspection today! Lic and insured For home inspections in NY and CT

"My deck needed a lot of work. Peter and his team did a beautiful job. "

Eileen O on September 2025

True home remodeling from big jobs to small we do!!! it all kitchens, bathrooms, painting, power washing, and repairs. with over 40 years experience you know the job will get done right! call us today! . . . . True Home Inspections With over 1,000 home inspections under our belt and our construction experience we are one of the most experienced home inspections companies out there. From small units to large homes we have inspected every type of building. We guarantee a 24 hour inspections report turn around for your convenience call us and schedule your inspection today! Lic and insured For home inspections in NY and CT

"My deck needed a lot of work. Peter and his team did a beautiful job. "

Eileen O on September 2025


Avatar for Douglas Marshall Cooper Associates, LLC

Douglas Marshall Cooper Associates, LLC

57 Westchester Avenue
4.63(
22
)
Approved Pro

Douglas Marshall Cooper Associates, LLC

57 Westchester Avenue
4.63(
22
)
Approved Pro
Customers say: Quick response
29 years of experience
Free onsite estimate

Douglas Marshall Cooper Associates is a full-service design and construction firm whose practice encompasses both new and existing buildings of residential and commercial use, as well as speculative housing and development. Mr. Cooper’s office is located in Pound Ridge, New York and includes a staff of himself, an associate partner, three assistants and a host of carpenters, masons, and laborers, in addition to various subcontractors that work on projects small to large. Douglas Marshall Cooper Associate's roots are based in Construction, Design, Real Estate Investment and Development & Construction Management. Our portfolio includes a wide range of work across these fields. Our uniqueness comes from understanding what it is to be the Owner, the Developer and the Builder –- a trifecta that is evident in DMC Associate's core portfolio of prestigious residential, commercial, and corporate projects. Douglas Marshall Cooper Associates, LLC...a solid track record. A powerful future.

"I wish I could give zero stars. We hired Douglas for a kitchen remodel which involved installing a kitchen island, pantry, and all the related plumbing and electrical work. The communication between Douglas and his carpenter was terrible. We submitted sketches and agreed upon the design for the cabinets which were meant to be overlaid. When the island arrived, the cabinets were inset which did not match the rest of the kitchen. In addition, the kitchen island has split and cracked at more than half of the joints. The pantry cabinet has split and areas of unpainted MDF are showing. We have needed to paint and touch up many of these spots. Regarding the plumbing, we have had multiple significant leaks from piping and tubing that the team installed. Water has leaked even through the floor and into the basement. Upon review from other plumbers, all have confirmed the parts used were cheap and of low quality, and the workmanship was subpar. After a major leak in the middle of the night, we reached out to Douglas and respectfully voiced our issues and complaints. He ignored us for a full month, and then instead of simply stopping by to take a look at the problems (which would have been the first major step to alleviating our frustrations), he responded in a despicable manner. He even included the following quote from his lawyer, He laughed saying that perhaps you lost your job (due to the CoronaVirus) and were probably scrounging for any money you could scrape up. Who would want to work with someone like this?"

Keri P on October 2020

Douglas Marshall Cooper Associates is a full-service design and construction firm whose practice encompasses both new and existing buildings of residential and commercial use, as well as speculative housing and development. Mr. Cooper’s office is located in Pound Ridge, New York and includes a staff of himself, an associate partner, three assistants and a host of carpenters, masons, and laborers, in addition to various subcontractors that work on projects small to large. Douglas Marshall Cooper Associate's roots are based in Construction, Design, Real Estate Investment and Development & Construction Management. Our portfolio includes a wide range of work across these fields. Our uniqueness comes from understanding what it is to be the Owner, the Developer and the Builder –- a trifecta that is evident in DMC Associate's core portfolio of prestigious residential, commercial, and corporate projects. Douglas Marshall Cooper Associates, LLC...a solid track record. A powerful future.

"I wish I could give zero stars. We hired Douglas for a kitchen remodel which involved installing a kitchen island, pantry, and all the related plumbing and electrical work. The communication between Douglas and his carpenter was terrible. We submitted sketches and agreed upon the design for the cabinets which were meant to be overlaid. When the island arrived, the cabinets were inset which did not match the rest of the kitchen. In addition, the kitchen island has split and cracked at more than half of the joints. The pantry cabinet has split and areas of unpainted MDF are showing. We have needed to paint and touch up many of these spots. Regarding the plumbing, we have had multiple significant leaks from piping and tubing that the team installed. Water has leaked even through the floor and into the basement. Upon review from other plumbers, all have confirmed the parts used were cheap and of low quality, and the workmanship was subpar. After a major leak in the middle of the night, we reached out to Douglas and respectfully voiced our issues and complaints. He ignored us for a full month, and then instead of simply stopping by to take a look at the problems (which would have been the first major step to alleviating our frustrations), he responded in a despicable manner. He even included the following quote from his lawyer, He laughed saying that perhaps you lost your job (due to the CoronaVirus) and were probably scrounging for any money you could scrape up. Who would want to work with someone like this?"

Keri P on October 2020


Avatar for Westbrook Contracting, LLC

Westbrook Contracting, LLC

110 Washington Ave
5.00(
81
)
Approved Pro

Westbrook Contracting, LLC

110 Washington Ave
5.00(
81
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
14 local quotes requested

Westbrook Contracting LLC offers the highest level of professionalism and quality renovations Westchester County. We strive to meet our residential and commercial clients’ individual needs and do not cut corners. Dave, the owner, is on the jobsite from the first consultation through the close of the project to ensure his high standards. Thank you for considering Westbrook Contracting LLC and we look forward to impressing you!

"I couldn't be happier with the incredible work Westbrook Contracting, LLC did on our new deck! From the first consultation to the final nail, the team was professional, punctual, and truly skilled. They helped us design a space that perfectly fits our lifestyle, blending functionality with beautiful craftsmanship. The attention to detail was impeccable—every board is aligned perfectly, and the finish work is top-notch. We’ve already gotten so many compliments from neighbors, and our new porch has quickly become our favorite spot to unwind in the evenings. If you're considering adding or upgrading a deck or porch, don’t think twice—Westbrook Contracting is the way to go. Quality work, great people, and results that truly speak for themselves!"

Julie A on July 2025

Westbrook Contracting LLC offers the highest level of professionalism and quality renovations Westchester County. We strive to meet our residential and commercial clients’ individual needs and do not cut corners. Dave, the owner, is on the jobsite from the first consultation through the close of the project to ensure his high standards. Thank you for considering Westbrook Contracting LLC and we look forward to impressing you!

"I couldn't be happier with the incredible work Westbrook Contracting, LLC did on our new deck! From the first consultation to the final nail, the team was professional, punctual, and truly skilled. They helped us design a space that perfectly fits our lifestyle, blending functionality with beautiful craftsmanship. The attention to detail was impeccable—every board is aligned perfectly, and the finish work is top-notch. We’ve already gotten so many compliments from neighbors, and our new porch has quickly become our favorite spot to unwind in the evenings. If you're considering adding or upgrading a deck or porch, don’t think twice—Westbrook Contracting is the way to go. Quality work, great people, and results that truly speak for themselves!"

Julie A on July 2025


Avatar for Dynamic Design & Remodeling

Dynamic Design & Remodeling

500 Post Road
5.00(
14
)
Approved Pro

Dynamic Design & Remodeling

500 Post Road
5.00(
14
)
Approved Pro
Super Service Award
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

We offer free estimates for any size project : kitchens, bathrooms, exteriors, roofing, additions, decks, bedrooms, basements, or even an entire home. We also provide design work with multiple photo realistic renderings and 360° views along with full floorplans and elevations, so you can really envision your new space before you build it. We help to guide our clients through every stage of a renovation so that it comes in on time and on budget. Call us today at 203-644-9124.

"I highly recommend DDR. There are so many contractors out there and it is difficult to know what youâ ll get when you hire someone, from the quality of the work to the level of communication. This team did a great job from start to finish, and delivered a beautiful new space for my family. We selected DDR after getting multiple bids to update our walk-out basement into a more livable space. Key in this selection -- the price was competitive, and the team seemed attentive to the project needs as outlined. I had a tight budget and relatively aggressive timeline for this project. Admittedly the timeline was impacted by a few things that were out of DDRâ s control, including the Town building inspectorâ s schedule and a delivery delay (a new window arrived damaged and had to be reordered.) Nevertheless, the team stayed on budget and delivered a wonderful new basement. What a great project team -- led by Alex, the team (including John + Angel) truly transformed a dark dingy space into a bright fresh room. Alex was very thoughtful in suggesting options that would improve things and was exceptionally attentive to detail. He was super responsive to any texts or questions. In particular, I appreciated his high level of â perfectionismâ in how the finished product turned out. For phase 2, we need some custom cabinetry built for the space and I look forward to having the DDR team return to work on this next phase."

Alison F on November 2024

We offer free estimates for any size project : kitchens, bathrooms, exteriors, roofing, additions, decks, bedrooms, basements, or even an entire home. We also provide design work with multiple photo realistic renderings and 360° views along with full floorplans and elevations, so you can really envision your new space before you build it. We help to guide our clients through every stage of a renovation so that it comes in on time and on budget. Call us today at 203-644-9124.

"I highly recommend DDR. There are so many contractors out there and it is difficult to know what youâ ll get when you hire someone, from the quality of the work to the level of communication. This team did a great job from start to finish, and delivered a beautiful new space for my family. We selected DDR after getting multiple bids to update our walk-out basement into a more livable space. Key in this selection -- the price was competitive, and the team seemed attentive to the project needs as outlined. I had a tight budget and relatively aggressive timeline for this project. Admittedly the timeline was impacted by a few things that were out of DDRâ s control, including the Town building inspectorâ s schedule and a delivery delay (a new window arrived damaged and had to be reordered.) Nevertheless, the team stayed on budget and delivered a wonderful new basement. What a great project team -- led by Alex, the team (including John + Angel) truly transformed a dark dingy space into a bright fresh room. Alex was very thoughtful in suggesting options that would improve things and was exceptionally attentive to detail. He was super responsive to any texts or questions. In particular, I appreciated his high level of â perfectionismâ in how the finished product turned out. For phase 2, we need some custom cabinetry built for the space and I look forward to having the DDR team return to work on this next phase."

Alison F on November 2024

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FAQs for addition to existing structure building service projects in Ossining, 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 Ossining, 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.

  • 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.