How much do addition contractors typically cost?
- Swarthmore, Pennsylvania Average$55,328
- Typical Range$15,000 - $55,328
- Low End - High End$13,500 - $150,000
"I am absolutely pleased with GJP Developers. From my initial meeting with, Gary, the owner, throughout the entire project experience, there was clear consistent communication. All of my questions were answered. The crew were efficient, timely, respectful and skilled. They built a powder room on my 1st floor. The job was completed earlier than the original plan. I recommend GJP Developers with the highest commendations."
DDE163B53B56EF5FE62546381A8650940F487A92AB9A49D78789CC2C6633FE04 9. in July 2026

"Gary and his team replaced my roof. It had been leaking for months. I was so pleased with the results!! No more leaks!!!! He responded quickly and got to work right away. He was very professional and affordable. I will definitely be using Legacy Construction again for other projects. Thanks again Gary!!"
280E786E063960261E234271CDCE3285A5FC624DFD934F74FDC1AA98CE59D18C F. in July 2026
"The team at Apex did an amazing job! Very professional, kept the project on pace and even finished sooner than planned! We are so very happy with our kitchen remodel and it was a pleasure to work with Apex"
9F7BFA37468A30117E552B93277DA709AFD94C0DF899FBF8E48ECFCB709B8107 4. in September 2026

Basement Remodels, Home Additons, Bathroom Remodels , and 6 more
"This was an amazing experience, we had never done a renovation like this before and it was due to a pipe exploding in our basement. Not only did Perry and his team do an incredible job, they were unbelievably patient and understanding as we dealt with the insurance company and all the hassles they create. Their experience, craftsmanship, and tremendous customer service made this a wonderful experience and our new basement looks incredible! Thank you all again! We will definitely be using these guys for any future renovations/contracting work."
Alexander B. in December 2023
About us: "Our mission is to be a construction contractor that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. We won't leave until the job is done right! Call or click to schedule an estimate today!"
In business since 1987
About us: "Welcome to Santosusso Construction! Located in Philadelphia, PA. Covering the Tri-State area. We are licensed & insured, offering free estimates. We specialize in residential work including: New Construction, Total Gut Renovations, Remodels, Additions, Decks, Kitchen / Bath, Roofs,Concrete,Basement Dig-outs, Brick Fronts, Demo, Etc. I'm Steve Santosusso owner and operator of Santosusso Construction Inc. Santosusso Construction has been a licensed company since 1988, beginning in Los Angeles, California. After being involved in construction for a number of years, I attended and graduated from Pacific Coast Contractor's School. The curriculum included general knowledge of all trades, estimating, and OSHA laws. In 1993 I moved my company to the East Coast where I've been licensed in PA ever since. We are a small personal company with hands on attention to every project. Our employees are well trained and trust-worthy, as are all sub-contractors, whom I have used for many years. This combination of employees and sub-contractors provides a team atmosphere with quality work as our goal. Check us out on Facebook: https://www.facebook.com/SantosussoConstructionInc/"
In business since 2014
Home additions, full service kitchen, bathroom, & basement renovations, Kitchen Cabinets, Flooring, Electrical, Plumbing, Tile, Custom Furniture, Designing, decks,
About us: "Experienced, insured, and licensed Christ centered remodeling & custom woodworking business. MNB Renovations specializes in; home additions, kitchen, bathroom, basement remodeling, decks, and custom woodworking. We provide free estimates, Call Matthew at 717-940-9159 HIC# PA129881"

In business since 2026
Addition to Existing Structure - Build, Major Renovation - Multiple Rooms, Kitchen - Remodel , and 1 more
About us: "At Grimaldi Builders, we get the job done right. Founded by an Ivy League-educated engineer with a Master's degree in Sustainability and a LEED Accredited Professional, our company brings a level of technical knowledge and project management rarely found in the residential contracting industry. We specialize in residential or commercial renovations; kitchens, bathrooms, basements, exteriors, additions, and general contracting services. Every project is approached with a focus on durability, building science, and long-term value-not just getting the job done, but getting it done right. Why choose Grimaldi Builders? -Engineer-led project planning and problem solving -Licensed and insured -Strong focus on quality , detail, and code compliance -Clear communication and transparent pricing -Sustainable building practices when appropriate -Local knowledge of Philadelphia and surrounding suburbs Our goal is to provide professionalism, reliability, and attention to detail."

New Builds, Additions
"Chris and his team were awesome. From the initial start we knew we were in great hands.. great communication throughout the entire project, answered all of our questions that we had.. we love our new addition !!"
5597FFC0D90EB19A301C96382E0D1F5573CB3985DEED095714BCDBA790EACEC4 3. in July 2026
HomeAdvisor makes it easy to connect with pros near you. You can read reviews, get quotes and book appointments all in one place.
Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.
You can use HomeAdvisor to help evaluate a contractor’s qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a pro’s HomeAdvisor profile, and sometimes, his or her website.
Your research doesn’t stop here. Once you’ve found a few prospective companies, make an call to ask a few questions about work history, licensure and more:
In most cases, the responses you get to these three questions will give you a very good idea of the right pro for your project. If you have more than one front-runner, these additional questions can help you narrow it down.
Any good contractor will answer these questions, and most will appreciate dealing with a client that takes such an active interest in finding good service. On the other hand, if a contractor gives you a hard time with these questions, you probably want to find someone else.
Swarthmore Addition & Remodeling Contractors are rated 4.3 out of 5 based on 26 reviews of 26 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
If you're looking for Build an Addition Contractors that serve a different city in Pennsylvania, here are some popular suggestions:
What best describes this project?
Find out how HomeAdvisor can help your business