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

Avatar for All-Phase Construction Company, LLC.
All-Phase Construction Company, LLC.
4.8(
177
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"Absolutely amazing team always on time. I hired Allphase construction for a big project and Second story addition and they did an astonishing job from the beginning to the end in a manner time! Joe the owner is a great guy to work with, Josh the project manager is a very easy communicator, good listener and attentive to the details I call him Golden Jxxx I recommend them to anyone! Thank you so much Allphase Construction Team for making me and my little family more living space!!! Definitely I will use them egain for future needs."
Bay View Window addition
Staircase transformation
Bay View Window
Window Installment
Outdoor Deck addition

+43

Response time2 days
Response rate86%
2 neighbors recently requested a quote
Avatar for MNB Renovations
MNB Renovations
5.0(
10
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Matt and his team with MNB Renovations did a 32 x 24 addition that was basically a home build from the ground up. I am still surprised for the size of this project how stress free the process was. Matt was very detailed and checked in on everything to make sure we were getting what we wanted. In the end he asked us to make a list of anything that needed to be addressed and there was absolutely nothing to mention. They did a perfect job, the quality of the work is amazing, and the entire team was very nice, professional, and trustworthy! I absolutely recommend this company to others and will definitely use them again in the future!"
Kitchen Remodel
New stair case and great room
Oak staircase
Kitchen Remodel
Entry way

+181

Response time5 days
Response rate100%
3 neighbors recently requested a quote
Avatar for Philip Home Improvements LLC
Philip Home Improvements LLC
5.0(
10
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Warranties offered

"New floors, new sink, pantry shelves installed, microwave with built in range put in, some repairs to pipes and electric outlets. He did an awesome job. I’m very happy we connected through Angie’s"
Response time1 day
Response rate90%
7 neighbors recently requested a quote
Avatar for Robert Horne Contracting
Robert Horne Contracting
4.5(
92
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Bob and his partner were great! Very personable and do a beautiful job. Bob kept in contact about every step of the project and kept it close to the budget I was looking for. It was a small bathroom remodel and he turned into a very functional and charming bathroom. He even used the design ideas I had to bring it to life and even kept in contact after to make sure everything was working well still. Highly recommend!"
Additional Photos
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Additional Photos

+32

Response time4 days
Response rate100%
5 neighbors recently requested a quote
Avatar for E.Z. General Construction Inc
E.Z. General Construction Inc
3.7(
6
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"The work included excavation, concrete patio, A frame roofing, electrical outlets, and railing addition. Work done in a timely fashion. Workmanship was excellent and cost factor extremely favorable."
Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Smooth Finish Bathrooms LLC
Smooth Finish Bathrooms LLC
5.0(
1
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

Approved

"Josh did a great job replacing all the windows in our sunroom. He also redid two bedrooms with new drywall and paint. Would highly recommend"
Remodeling - General Project
Custom shower with Tiled ceiling
Prep
Remodeling - General Project
Schluter heated floor system

+27

Response time1 day
Response rate100%
1 neighbors recently requested a quote
Avatar for Reichardt Remodeling
Reichardt Remodeling
4.6(
83
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Dan and his son Tyler did an outstanding job. The basement was broken up in separate spaces including a 22' by 7' area which will double as a plant room during the winter time. He installed a counter and sink in this space and added a floor to ceiling built in bookshelf. To close off this area from the main space, he also installed a barn door which looks great. In the main area the work was done to perfection. The bathroom is a little jewel and we could not be happier with the work that was done. Dan and Tyler also went above and beyond when they moved furniture from the main floor to the basement and also put up additional shelves for us. I told Dan to pencil us in for the same time next year to update our main bathroom!"
Additional Photos
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+5

Recommended by97%of homeowners
Avatar for Action Door & Property Services LLC
Action Door & Property Services LLC
4.2(
102
)
Addition to Existing Structure - Build

Serving Christiana, PA and surrounding areas

In business since 1992

Free estimates

Emergency services offered

"The workers were all very professional and respectful. Both jobs were completed as promised. There is much that is not standard in an old house and they were very creative in coming up with solutions to interesting problems that showed up. I will definitely hire them again."
Deck (Replaced & Add-On) - Dover
Mowing & Trimming - Dover
Installation of Flooring - Laminate - Spring Grove
Drywall - Colombia
Deck (Tear Down & Replaced) - York

+96

Response time3 days
Recommended by85%of homeowners
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FAQs for addition to existing structure building service projects in Christiana, PA

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 Christiana, PA 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.