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

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

Serving Mount Joy, 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%
4 neighbors recently requested a quote
Avatar for MNB Renovations
MNB Renovations
5.0(
10
)
Addition to Existing Structure - Build

Serving Mount Joy, 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 Tradesman Construction
Tradesman Construction
4.7(
81
)
Addition to Existing Structure - Build

Serving Mount Joy, PA and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"Hunter and his team finished my basement. They were always prompt, professional and friendly. They were able to start my project within a couple of weeks and was completed in a very timely manner. The project was coordinated and managed very well, there was rarely a day of no activity. Hunter was easy to communicate with and very responsive, knowledgeable, and flexible. The workers were knowledgeable and took pride in their work. The pricing was very reasonable and the result was high quality. Great experience. I highly recommend Tradesman Construction."
Basement after
Duncannon Basement Finish
Basement
Duncannon Basement Finish
Basement

+113

Response time1 day
Response rate86%
9 neighbors recently requested a quote
Avatar for Somrok, Inc. DBA Stephen Black Builders, Inc.
Somrok, Inc. DBA Stephen Black Builders, Inc.
4.4(
11
)
Addition to Existing Structure - Build

Serving Mount Joy, PA and surrounding areas

Approved

Super Service Award Winner

In business since 1979

Free estimates

Customers say: True professional

"I had a basement remodel project that included new flooring, some new framing/walls, removal of a drop ceiling, new drywall ceiling, new lighting, and new paint. Working with Eric was great. He kept in constant contact and kept me updated all along the way. He made some suggestions that improved the overall project and always kept me informed if there would be any changes to cost. He always kept me informed on the schedule even if there was a small change to a subcontractor coming earlier or later than originally discussed. The job was completed on time and on budget, I wouldn't hesitate to hire Eric (Somrok Inc.) again for a future project and highly recommend him."
Before
Finished sunroom
Old front elevation
Old rear elevation
FRont finished elevation

+39

Response time1 day
4 neighbors recently requested a quote
Recommended by55%of homeowners
Avatar for BiiLT Contracting Group, LLC
BiiLT Contracting Group, LLC
4.3(
55
)
Addition to Existing Structure - Build

Serving Mount Joy, PA and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Hired them to hang sheet rock for a renovation. The end result was great and the workers were nice. Only will mention that they didn't seem set up to do work in existing homes. Showed up on a wet day without any floor protection for our hardwood floors I specifically pointed out during the estimate needed to be protected. Would use them again though."
After
Beautiful New Kitchenette
Open Recreation Area
Full view of the renovated bathroom
Sunroom addition

+126

Response time1 day
Response rate96%
133 neighbors recently requested a quote
Avatar for Robert Horne Contracting
Robert Horne Contracting
4.5(
92
)
Addition to Existing Structure - Build

Serving Mount Joy, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"We needed our free-standing shower replaced. This included replacement of some tile outside the shower, and cosmetic repair of part of a wall in our bedroom. Big bathroom contractors like Luxury Bath told us we would have to get separate contractors for each of those projects. Bob took care of everything. In addition, it turned out that our shower was not a standard size and required a custom design. Bob handled this as well. Due to this, the project lasted longer than initially expected as the shower glass had to be specially ordered. However, we now have a rain-drop glass shower with rain shower head and hand-held sprayer that blends in with our existing master bath. Bob's tile work is beautiful. We got the shelf in the shower we wanted as well as our choice of tile and design (Bob met me at a tile store of my choosing to pick out the tiles for the entire project). Importantly, Bob kept within the budget agreed upon. He consulted with us throughout the project so we were always aware of where things stood and understood when the project was delayed."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+32

Response time4 days
Response rate100%
5 neighbors recently requested a quote
Avatar for Wilson Renovations LLC
Wilson Renovations LLC
5.0(
6
)
Addition to Existing Structure - Build

Serving Mount Joy, PA and surrounding areas

Approved

Free estimates

"Complete the job according to our timeline. Left the place clean. Priced reasonably. Very friendly. Very recommend. I’ll call him for all future jobs. Thank you Joe Wilson"
Staircase Remodel
Staircase Remodel
Staircase Remodel
Staircase Remodel
Custom Bathroom Remodel

+15

7 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Mount Joy, 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 Mount Joy, 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.