Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Nassau, DE

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.

Top-Rated Addition to existing structure builders in Nassau - Updated Nov 2026

Coastal Home Renovations
4.8(
42
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"Joe and his team were a pleasure to work with. They kept to the schedule as promised and completed the job in a timely manner. The painters were prompt each morning, courteous, and cleaned up completely. The painting was professional and looks fantastic. We would highly recommend this company and will be calling them to do work in the near future!"
Response time3 days
1 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Last Looks LLC
Last Looks LLC
4.9(
28
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

Super Service Award Winner

Free estimates

Warranties offered

Credit card accepted

"Tony was a great communicator. We were asking for a custom build fence. We had contacted some of the basic fence companies prior to getting Tony’s name and no one would even quote us. He basically helped design in and pulled the permit for us. The end product was great and we’d recommend."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+96

Response time4 days
Response rate100%
6 neighbors recently requested a quote
Callaway Corporations LLC
4.7(
24
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

We offer financing and will deal directly with your insurance company if you need assistance. \n \nCallaway Corporations LLC offers a discount to first responders and veterans. With 20+ years of industry experience, we offer top-quality additions, decks, roofing, windows and doors, gutters, and more! Give us a call today! \n

55 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Elite Construction
Elite Construction
5.0(
11
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Credit card accepted

"I worked with Elite Construction to transform my old garage into a one bedroom home, and I couldn’t be happier with the result! Every detail was handled meticulously, from the design phase to material selection, construction, and final delivery. The team's friendly communication and creative solutions that exceeded my expectations truly impressed me. Now, I proudly enjoy this space that has been transformed into a stunning living area. Thank you for this amazing transformation! Definitely Elite Construction I would love to work with again.""
Response time12 hrs
Response rate100%
Avatar for Accessible Home Builders, Inc.
Accessible Home Builders, Inc.
3.7(
76
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

In business since 1994

Free estimates

Warranties offered

"Scott was very professional. He explained the process of what was being done on the building of the screened porch each day. His crew was also professional and courteous. Completed porch came out beautiful. Would definitely recommend them."
Beautifully Detailed Deck
 Family Room Addition
Windows/Siding Complete
 Screened Porch Addition
 Screened Porch with Double Doors

+42

Response time10 hrs
19 neighbors recently requested a quote
Recommended by95%of homeowners
Cambria Construction Services, LLC
4.2(
30
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

Cambria Concrete Services LLC is dedicated to providing our clients with the very best in concrete installation and repair for driveways, sidewalks, patios, steps, and a variety of other projects. With over 20 years of industry experience, we take and enormous amount of pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

Jobs
Rehab after
Previous job
 Masonry
 Masonry

+21

5 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Preston Building
Preston Building
5.0(
1
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

In business since 2005

Free estimates

Customers say: Quick response

"I can't say enough good things about my experience with Randy Preston and his crew!! Randy helped me renovate a garage that was in SEVERE disrepair into a beautiful and charming studio cottage. The craftsmanship was excellent. I regularly get compliments and feedback that the cottage has the feel of a home that's been there forever (think circa 1940's cottage). The crew was always on time, kept the site neat and clean and were super easy & pleasant to work with. Randy's personality is "steady and calm" - nothing ever felt like a problem - if it was within his power, he handled it and if it wasn't, he helped me figure out next steps. Renovations are rarely stress-free but Randy's nature helped to make it as stress-free as possible. I think the thing I was most impressed with was his transparency and honesty. He was the only contractor that provided me with a fully itemized estimate. I knew exactly how much was budgeted for EVERYTHING and at the end of the construction, he actually credited me back money for things I would have NEVER known cost less then estimated. Every step of the process (that he had control of) was great. I'd hire him again in a heartbeat and hope I do get to use him again for a future project I have in mind. If I haven't gotten the point across yet, I highly highly recommend!!"
Response time2 days
Recommended by100%of homeowners
DUTCH BROTHER'S, INC.
New to Angi
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Approved

In business since 2009

Free estimates

DUTCH BROTHER'S, INC. has been in business for over 50 years! We specialize in all your Decks and Additions needs, we are your guys! We strive to exceed the homeowners expectations each and every time, and get the job done the way you want it. We work in a timely fashion, and always pay attention to detail. Proudly serving Harbeson and surrounding areas. Free estimates, call today! \n

Avatar for Link Brothers Home Improvement LLC
Link Brothers Home Improvement LLC
5.0(
9
)
Addition to Existing Structure - Build

Serving Nassau, DE and surrounding areas

Free estimates

Credit card accepted

"I have used Danny at least 10 times. He remodeled an investment property I purchased and did carpentry, flooring , some electrical and plumbing. His work is EXCEPTIONAL and he has the strongest attention to details. His carpentry skills are next level, he rebuilt a stairwell and raised a roof as well. Very trustworthy guy, and did a lot of the work for me with no supervision as the property was in another state. Never had any issues and he sent pictures of the work daily. Additionally after the work was completed I started using him in my personal home in pa and he did flooring/ tile and built shelving, installed toilets and sinks and built a bar in my basement. All the work was great! Prices are very fair !!"
Custom built shed/storage unit
Exterior Wood Trim
Custom built shed/storage unit
Exterior Wood Trim
Custom built shed/storage unit

+23

Recommended by100%of homeowners
...
Showing 1-10 of 148
FAQs for addition to existing structure building service projects in Nassau, DE

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 Nassau, DE 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.