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Find Addition to existing structure builders in Hollis

Avatar for iCornerstone, Inc.

iCornerstone, Inc.

4.91(
47
)
Approved Pro

iCornerstone, Inc.

4.91(
47
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
38 years of experience

iCornerstone offers design through construction services and promotes Consumer Controlled Construction as a solution to over-pricing, under performance, unrealistic allowances, and quality issues. We provide designs, labor and material specifications, accurate project costs, camera monitoring, invoice review, project accounting, and construction support that allow the homeowner to act as the general contractor easily and with a minimal time commitment. The first three carry an hourly rate of $100, while the fourth is 15% of the cost of the work as you have defined it. After a free Initial Consultation, we provide a proposal for the cost of our services. Our platform networks regulators, engineers, subcontractors, service providers, and suppliers involved in your project so that everyone knows what everyone else knows, which is the hallmark of transparency and accountability. Everyone is on the same page. Their E-folios resolve the dilemma of "If only I had known, I would have asked." Everyone benefits, and nothing like the platform exists in the industry. Clients must provide us the names of subcontractors we do not know as a means of proving to themselves we do not steer business or have a conflict of interest. This strategy helps our network grow and ensures fairness. Our free, online, Consumer E-Folio / Project Organizer / Property Profile / Research Tool will help you, even if you do not involve us in your project, comes with no strings attached, and respects your privacy. Simply register at icornerstoneinc.com and have fun using it. We claim three remarkable achievements: no client has ever gone over budget; no subcontractor has ever been overpaid or unpaid without cause; and all clients receive the highest quality at the lowest price.

"Richard and all of his subcontractors were wonderful to work with. He is so thoughtful and kind. It is clear that he loves what he does! Every detail is thought through and he is great at problem solving when things pop up along the way. If you’re questioning whether to go with him - just do it! He is a great communicator and you’ll always feel you’re on the same team."

Kristen F on February 2026

iCornerstone offers design through construction services and promotes Consumer Controlled Construction as a solution to over-pricing, under performance, unrealistic allowances, and quality issues. We provide designs, labor and material specifications, accurate project costs, camera monitoring, invoice review, project accounting, and construction support that allow the homeowner to act as the general contractor easily and with a minimal time commitment. The first three carry an hourly rate of $100, while the fourth is 15% of the cost of the work as you have defined it. After a free Initial Consultation, we provide a proposal for the cost of our services. Our platform networks regulators, engineers, subcontractors, service providers, and suppliers involved in your project so that everyone knows what everyone else knows, which is the hallmark of transparency and accountability. Everyone is on the same page. Their E-folios resolve the dilemma of "If only I had known, I would have asked." Everyone benefits, and nothing like the platform exists in the industry. Clients must provide us the names of subcontractors we do not know as a means of proving to themselves we do not steer business or have a conflict of interest. This strategy helps our network grow and ensures fairness. Our free, online, Consumer E-Folio / Project Organizer / Property Profile / Research Tool will help you, even if you do not involve us in your project, comes with no strings attached, and respects your privacy. Simply register at icornerstoneinc.com and have fun using it. We claim three remarkable achievements: no client has ever gone over budget; no subcontractor has ever been overpaid or unpaid without cause; and all clients receive the highest quality at the lowest price.

"Richard and all of his subcontractors were wonderful to work with. He is so thoughtful and kind. It is clear that he loves what he does! Every detail is thought through and he is great at problem solving when things pop up along the way. If you’re questioning whether to go with him - just do it! He is a great communicator and you’ll always feel you’re on the same team."

Kristen F on February 2026


Avatar for MMP Construction Inc

MMP Construction Inc

4.63(
214
)
Approved Pro

MMP Construction Inc

4.63(
214
)
Approved Pro
Customers say: Super punctual
22 years of experience
Free onsite estimate

At MMP Construction we pride ourselves on delivering great craftsmanship, and providing the best customer experience at competitive prices. From complete remodeling and additions, to snow removal and minor roof repairs we also specialize in 203k and home style loans, MMP Construction will complete the job in a timely and professional manner. We understand the investments our customers are making and we proactively provide updated timelines and information regarding the job, from start to finish.

"We needed a skylight installed in our bathroom, and MMP did an excellent job--we are very happy with it! The team was friendly and worked quickly and efficiently to get it done before it got dark, and the quality of their work was excellent. Matt was very friendly and nice to communicate with as well, and always responded right away. I highly recommend MMP Construction to anyone looking for great quality work and excellent customer service."

Nathan S on November 2022

At MMP Construction we pride ourselves on delivering great craftsmanship, and providing the best customer experience at competitive prices. From complete remodeling and additions, to snow removal and minor roof repairs we also specialize in 203k and home style loans, MMP Construction will complete the job in a timely and professional manner. We understand the investments our customers are making and we proactively provide updated timelines and information regarding the job, from start to finish.

"We needed a skylight installed in our bathroom, and MMP did an excellent job--we are very happy with it! The team was friendly and worked quickly and efficiently to get it done before it got dark, and the quality of their work was excellent. Matt was very friendly and nice to communicate with as well, and always responded right away. I highly recommend MMP Construction to anyone looking for great quality work and excellent customer service."

Nathan S on November 2022


Avatar for John Wrobleski

John Wrobleski

5.00(
17
)
Approved Pro

John Wrobleski

5.00(
17
)
Approved Pro
Super Service Award
Customers say: True professional
28 years of experience
Free onsite estimate

John Wrobleski 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.

"Our experience working with John was a good one. He was responsive to all our questions and concerns. The quality of work is top notch. The crew working this project were excellent! They worked very hard in pretty extreme weather conditions. Bottom line,I would recommend John to other homeowners."

Beau R on July 2025

John Wrobleski 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.

"Our experience working with John was a good one. He was responsive to all our questions and concerns. The quality of work is top notch. The crew working this project were excellent! They worked very hard in pretty extreme weather conditions. Bottom line,I would recommend John to other homeowners."

Beau R on July 2025


Ayotte Home Improvements

4.52(
88
)
Approved Pro

Ayotte Home Improvements

4.52(
88
)
Approved Pro
Super Service Award
Customers say: Quality work
21 years of experience
Free onsite estimate

Ayotte Home Improvements is a fully licensed and insured remodeling/construction company. We offer free estimates and years of experience.Take a look at our website for some of our past projects.

"Bob was great- this was our first renovation as new homeowners and he helped us through the process, answering all of our questions and listening to what we wanted. We absolutely love the end result!"

John A on January 2025

Ayotte Home Improvements is a fully licensed and insured remodeling/construction company. We offer free estimates and years of experience.Take a look at our website for some of our past projects.

"Bob was great- this was our first renovation as new homeowners and he helped us through the process, answering all of our questions and listening to what we wanted. We absolutely love the end result!"

John A on January 2025


"Great job- efficient and the final product looked great"

Halley A on March 2026

Good work guarantee. I love making our customer's happy

"Great job- efficient and the final product looked great"

Halley A on March 2026


"Looks great!"

Karen C on June 2024

At Ricci's Painting & Contracting LLC, our priorities are customer service and quality work. We pride ourselves on building lasting relationships with our clients. Call us for an estimate. We look forward to working with you!

"Looks great!"

Karen C on June 2024


Avatar for O'Regan Construction

O'Regan Construction

4.98(
25
)
Approved Pro

O'Regan Construction

4.98(
25
)
Approved Pro
Super Service Award
Customers say: Quick response
38 years of experience
Free onsite estimate

With over 40 years of experience, O'Regan Construction, is a fully competent contractor serving Bedford and the surrounding areas. We specialize in Room Additions and remodels, custom kitchen and built-in's, Renovations, Garages, Decks and Finished basements. All types of Residential construction. Please give us a call for a free consultation on your next project.

"It was a pleasure to work with Paul. This was the first project I have done that came in on time and on budget. Excellent work and no complaints worthy of mentioning. He is honest, straightforward and has a sense of humor. I highly recommend him for projects up to an addition. "

Sid R on July 2025

With over 40 years of experience, O'Regan Construction, is a fully competent contractor serving Bedford and the surrounding areas. We specialize in Room Additions and remodels, custom kitchen and built-in's, Renovations, Garages, Decks and Finished basements. All types of Residential construction. Please give us a call for a free consultation on your next project.

"It was a pleasure to work with Paul. This was the first project I have done that came in on time and on budget. Excellent work and no complaints worthy of mentioning. He is honest, straightforward and has a sense of humor. I highly recommend him for projects up to an addition. "

Sid R on July 2025


"Phil remodeled my whole kitchen. He remolded my bathroom into a new full bath. His workmanship is excellent and his idea and design is good. His price is very reasonable. I will definitely hire him again for my next remodel job."

J l on March 2025

Serving Boston's North and South Shore for the past twenty years. Free estimates available. Both large and small jobs welcomed. Fully licensed and insured. Work is always done to the customer's satisfaction.

"Phil remodeled my whole kitchen. He remolded my bathroom into a new full bath. His workmanship is excellent and his idea and design is good. His price is very reasonable. I will definitely hire him again for my next remodel job."

J l on March 2025


Avatar for Xcc Pro Builders LLC

Xcc Pro Builders LLC

4.47(
15
)
Approved Pro

Xcc Pro Builders LLC

4.47(
15
)
Approved Pro
Customers say: Terrific value
12 years of experience
Free onsite estimate

Here at XCC Pro Builders we specialize in producing quality built projects. We have been in business since 2014 and do a wide range of projects additions, decks, siding, new construction, windows, kitchen and bathroom Renos. you name it we will take care of it. We have a great upbeat knowledgeable staff that love what they do.

"We are very impressed with XCC and their team. Our property is very challenging and there was now solid ground where the deck was being installed. XCC built us an amazingly beautiful and solid retaining wall. We absolutely love our deck. They even went ahead and added an extra landing for my elderly mother to take a rest on. We will definitely be calling them again when we are ready to update the deck on the main house."

kristina l on February 2025

Here at XCC Pro Builders we specialize in producing quality built projects. We have been in business since 2014 and do a wide range of projects additions, decks, siding, new construction, windows, kitchen and bathroom Renos. you name it we will take care of it. We have a great upbeat knowledgeable staff that love what they do.

"We are very impressed with XCC and their team. Our property is very challenging and there was now solid ground where the deck was being installed. XCC built us an amazingly beautiful and solid retaining wall. We absolutely love our deck. They even went ahead and added an extra landing for my elderly mother to take a rest on. We will definitely be calling them again when we are ready to update the deck on the main house."

kristina l on February 2025


Avatar for NML Legacy

NML Legacy

5.00(
3
)
Approved Pro

NML Legacy

5.00(
3
)
Approved Pro
26 years of experience
Free onsite estimate

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

"These guys did a fantastic job, very professional and clean. They were able to renovate both floors on my two family home within my budget and in a timely fashion. Handled everything from top to bottom, full clean out, gut bathrooms and kitchen, completely transformed the place. Couldn’t be happier with the finish product. Would recommend and hire again! "

Amanda G on February 2026

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

"These guys did a fantastic job, very professional and clean. They were able to renovate both floors on my two family home within my budget and in a timely fashion. Handled everything from top to bottom, full clean out, gut bathrooms and kitchen, completely transformed the place. Couldn’t be happier with the finish product. Would recommend and hire again! "

Amanda G on February 2026

Showing 1-10 of 19
FAQs for addition to existing structure building service projects in Hollis, NH

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 Hollis, NH 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.