Home Additions In Lebanon, PA

Custom Homes

Kitchen Remodeling

Bathroom Remodeling

Pole Buildings

Home Additions

Whole-Home Remodeling

Love Your Home? Don't Move. Improve.

Your home is filled with memories, rooted in a neighborhood you love. But what happens when your family’s needs change? Instead of facing the stress and uncertainty of the real estate market, a custom home addition allows you to seamlessly expand your living space and fall in love with your home all over again.

At ISM Construction, we specialize in creating beautiful, functional home additions that feel as if they were always part of the original design. We help homeowners adapt their homes to life’s changing demands. For over 30 years, our family-owned, design-build team has guided homeowners in Lebanon County through every type of addition project. Whether you’re welcoming a new family member, craving a master suite sanctuary, or needing a dedicated home office, we’ll guide you from initial idea to a finished space that enhances your life.

Transform Your Home with a Custom Addition

Why ISM is the Right Choice for Your Home Addition

An addition is a complex project that requires a deep understanding of design, structure, and seamless integration. Homeowners across Central PA trust ISM Construction because we are not just contractors; we are masters of our craft, dedicated to a flawless process and an exceptional result.

Our integrated design-build team means you have one partner and one point of contact from start to finish. This eliminates the confusion and blame that can arise when working with separate designers and builders. As proud members of the NAHB, PBA, and LCBA, with over 700 successful projects, our reputation is built on transparency, communication, and delivering on our promises.

Our Home Addition Gallery

Our Seamless Addition Process

01

Design & Plan

We meet at your home to understand your goals and assess the structural possibilities. Our in-house designers then create a custom plan that enhances your home's existing architecture and flow, complete with 3D visuals.

02

Price & Sign

We provide a detailed, transparent, fixed-price proposal. No surprises — just a clear path forward with a total investment you can plan around.

03

Build

Your dedicated Project Supervisor manages all aspects of the build, ensuring the highest quality while minimizing disruption to your family's daily life.

04

Walk Through & Enjoy

We conduct a meticulous final walkthrough to ensure your new space is perfect. Relax and enjoy your expanded home, backed by our comprehensive warranty.

What Our Addition Clients Say

    
 
 
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   Khine K. 
 
 
 
 Trustindex verifies that the original source of the review is Google. We cannot recommend ISM enough. Every single person in the company has been amazing to work with. They were very responsive and at times during the planning phase when my husband and I did not see eye to eye, they came up with designs that combined what my husband and I wanted, that we are both happy with. They have been extremely accommodating as well with last-min changes. And they work with (most) contractors that very much care about what they do, that resulted in high quality workmanship. We highly recommend working with ISM for all of your project needs.
  
 
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   Clair Wilson 
 
 
 
 Trustindex verifies that the original source of the review is Google. ISM is great to work with. Very attentive staff and attention to every detail!
  
 
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   Linda Vance 
 
 
 
 Trustindex verifies that the original source of the review is Google. Building our forever home was something I had dreamed about for many years. The moment we met the team at ISM Construction, we felt at ease and reassured that we were in good hands. We knew they would be the right company to build our forever home. Their knowledge, experience, and reassurance helped us decide that ISM was the builder best suited for us ISM operates with integrity, responsibility, and a strong sense of accountability, and that spirit shows in everything they do. Ivan carries himself with a calm confidence that immediately puts you at ease. Josiah led our project and shared their program with us, which included a construction schedule, changes made, our selections, and many other details that made everything easy to follow. His steady leadership, great patience, and willingness to explain things more than once were truly appreciated. Nate was incredibly detail-oriented and organized. Many of the thoughtful ideas in our drawings came from his careful planning. Dawson, our project manager, was hands-on, personable, and always kind. When we visited the site, he answered all our questions with confidence and honesty. Together, they truly make an exceptional team. There were quite a few decisions to make, like layouts, finishes, details I didn’t even know existed.  Permit requirements were also an important part of moving forward which ISM handled effortlessly. They walked us through each step and remained committed to the schedule, even through last year's rainstorms and mud. Watching our land transform into a home was amazing and something I will never forget! As with any large project, small adjustments along the way are simply part of the process. What mattered to us was that the ISM team approached everything with professionalism and a willingness to make things right. That gave us peace of mind. ISM didn’t just build what we imagined, they helped make it even better. Now that we are settled in, friends and neighbors often compliment the beauty and quality of our home. It is everything we hoped for and more. We feel truly blessed to have worked with this team, and we are so grateful for the care they put into building our forever home. I would wholeheartedly recommend ISM to anyone looking to build. They will treat you like family and take pride in doing things the right way.
  
 
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   William Andrews 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had a great experience with ISM! They were quick to respond to our inquiry, provided us detailed plans and specs for our project. They had fair prices, amazing craftsmanship, and stayed on schedule! Every one of their workers were kind, professional, and we felt very comfortable around them. Highly recommended!
  
 
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   Jay Weaver 
 
 
 
 Trustindex verifies that the original source of the review is Google. We appreciated the work from ISM from day1 until move in. The experience showed in many areas. All the sub contractors met and exceeded our expectations. I would highly recommend ISM for your building needs. Jay & Miriam Weaver
  
 
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   Jayson Luckenbaugh 
 
 
 
 Trustindex verifies that the original source of the review is Google. Designing and refining a set of plans and bringing them to life requires the right partner and we were blessed to have found and work with ISM.  A selection process that was detailed, an organized schedule so we knew what was happening and when, communication throughout the project and working through challenges when things didn't go exactly as we planned made for a successful project.  We couldn't have envisioned the final product when staring at an untamed wooded lot on stake out day.  But ISM's experience, their excavator's vision (shoutout to Jere of On-Track!) made for a remarkable home we are lucky to have.  Thank you Ivan, Josiah, Nate, Dawson and the whole ISM team!
  
 
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   Glenn Warwood 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great experience working with ISM on our addition/ renovation project.
  
 
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   Amy Thome 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had a great experience working with everyone at ISM. They were very patient and flexible with us as we went back and forth with our additon to our ranch home. Definitely would recommend them!
  
 
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   Mike Spicer 
 
 
 
 Trustindex verifies that the original source of the review is Google. We did a remodel and an addition to our house and ISM were the best. Total professionals and everything exceeded our expectations. They gave us a schedule for 4 months and everything was done on time or earlier. They are perfectionists and it shows in the quality of their work. We need to remodel our kitchen and bathrooms next and there is only one company we will use and it’s ISM. Thanks so much for everything.

Pricing Guide

Category	Size	Estimated Cost	Details
New Homes	Small Medium Large	$350,000 – $450,000 $550,000 – $750,000 $1,000,000+	1,500 sq. ft. 2,500 sq. ft. 3,500 sq. ft.
Additions	Small Medium Large	$65,000 – $85,000 $180,000 – $225,000 $300,000+	Based on 14×16 Sunroom 20×30 Great Room Full in-law quarters with kitchen
Remodels	Small Medium Large	$50,000 $90,000 $300,000+	Bathroom Kitchen Whole House
Garages and Pole Buildings	Small Medium Large	$70K – $80K $180K – $195K $250K – $300K	Pole Building 30X40 Detached Garage Detached Garage W/Finished Second Floor Bonus Room

Home Addition FAQs

Your Building Questions, Answered

Will an addition increase my property taxes?

Yes, an addition will increase your home’s assessed value and property taxes. However, it also significantly increases your home’s equity and resale value.

How do you manage dust and disruption during construction?

We use dust mitigation techniques, including sealing off the work area with plastic and using air scrubber or fans, to keep your home as clean and comfortable as possible.

Can you match the existing materials of my home?

Absolutely. Our team excels at sourcing materials and using construction techniques that ensure your addition blends seamlessly with your existing home, both inside and out.

Ready to Grow? Let's Get Building.

If you’re feeling constrained by your current space but love where you live, a home addition is the perfect way to invest in your family’s future and your home’s value. Let’s explore the possibilities together.