Custom Enclosures
In Lehigh Valley, PA
We design and build custom sunrooms, seasonal enclosures, and outdoor living additions—crafted to expand your space with quality you can trust.
Looking For Sunroom or Addition Building Services in Lehigh Valley PA?
- Are you looking to expand your living space with a beautiful sunroom or home addition?
- Do you want to enjoy natural light year-round with a custom-designed sunroom?
- Is your current space feeling cramped, and you're considering adding more functional square footage?
- Concerned about the cost and process of building a high-quality addition to your home?
- Do you need expert guidance to create a seamless extension that matches your home’s style?
- Are you looking for a professional team to handle your sunroom or home addition project from design to completion?
Create Your Dream Sunroom or Addition with Milltek’s expert construction services.
We use top brands to ensure long-lasting beauty and protection for your outdoor space.

Schedule An Estimate
Select a day and time to schedule a no-pressure, no-obligation quote.
Expert Construction
At Milltek Decking & Railing, we specialize in expert sunroom and home addition construction, creating beautiful, functional spaces that enhance your home’s value and comfort. Our skilled team ensures every project is built with quality craftsmanship, blending seamlessly with your existing structure for a durable and stunning result.
Top-Quality Products
We use only the highest-quality materials from trusted brands to ensure your sunroom or home addition is built to last. From sturdy framing to premium finishes, our top-tier products provide superior durability, enhancing both the beauty and longevity of your new space while protecting it from the elements.
Attention to Detail
We believe that attention to detail makes all the difference. From meticulous planning to expert craftsmanship, we take pride in ensuring every aspect of your sunroom or home addition is perfectly executed. Your satisfaction is our top priority, and we’re committed to creating a seamless, high-quality space that enhances your home for years to come.

Lehigh Valley PA Sunroom & Addition Construction Services
Many of our customers choose to add a sunroom or home addition, and for good reason. Discover why these enhancements are so popular—from increasing your living space and boosting home value to providing year-round comfort and functionality. Let’s explore what makes a sunroom or home addition a smart investment for your home.

Sunrooms
Homeowners choose to build sunrooms and three-season rooms to create a bright, inviting space that enhances their home’s functionality. Whether you need a cozy retreat for relaxation, a spacious area for entertaining, or a versatile spot for a home office or playroom, a sunroom provides the perfect solution. At Milltek Decking & Railing, we design and construct sunrooms and home additions that seamlessly blend with your home, giving you a comfortable, light-filled space to enjoy year-round. Expand your living area and bring the outdoors in—without worrying about the weather.

Two-Season Rooms
A sunroom or three-season room allows you to enjoy the beauty of nature without worrying about insects, rain, or extreme temperatures. Whether it’s a peaceful afternoon surrounded by greenery or hosting a gathering with loved ones, you can relax in comfort, shielded from the elements. At Milltek Decking & Railing, we specialize in creating custom sunrooms and three-season rooms that provide the perfect balance of fresh air and protection. Enjoy the outdoors year-round, while staying safe and comfortable inside your beautiful, weatherproof space.
Check Out Our Reviews
EXCELLENTBased on 24 reviews
Trustindex verifies that the original source of the review is Google.
Go Explore Love2025-06-03We’re beyond happy with the work Milltek Decking and Railing did for our home! Big Tre and Little Tre—a kind, hardworking father-son duo—were a joy to work with from start to finish. They were professional, knowledgeable, detail-oriented, and incredibly reasonably priced. They rebuilt our deck stairs and railings, screened in the covered portion of our deck, added plywood to fully close off the deck floor, and built custom under-deck storage. They also took the time to point out flaws in the original deck build and gave thoughtful guidance on how to maintain it properly. What really impressed us was their confidence and clarity on a project that left other contractors scratching their heads. While others weren’t sure how to approach it, Big Tre and Little Tre came in with a solid vision and executed it beautifully. Their quote was also $20,000 lower than another contractor we consulted—without sacrificing quality. They exceeded our expectations, and we’re absolutely in love with our new outdoor space. If you want exceptional craftsmanship from people you can trust, call Milltek.Trustindex verifies that the original source of the review is Google.
Carol Skerle2025-05-27Milltek Decking did a beautiful job on my small project! From start to finish, they were professional, detail-oriented, and a pleasure to work with. Not only did they deliver exceptional craftsmanship, but they also completed the entire job ahead of schedule. I am thrilled with the result. If you’re looking for quality work and reliable service, I recommend Milltek Decking.Trustindex verifies that the original source of the review is Google.
Katie Knarr2025-05-14Milltek was wonderful to work with when we needed to have our deck replaced. They met with us and listened to what we wanted. They were professional and accommodating throughout the process. The deck was finished ahead of schedule and is absolutely beautiful!Trustindex verifies that the original source of the review is Google.
sharon weiner2025-04-22I would highly recommend Milltek! On time, friendly, courteous and did great work. I love my new deck and railing!Trustindex verifies that the original source of the review is Google.
Bronne Bruzgo2025-04-22Extremely pleased with the entire process from evaluation/quoting through final invoicing. Reasonable price with high-quality workmanship, which is hard to find these days. I highly recommend these folks!Trustindex verifies that the original source of the review is Google.
Vince Mullay2025-04-09Excellent quality work within a very good time frame at a reasonable rate.Trustindex verifies that the original source of the review is Google.
Nick Raso2025-03-20I couldn’t be happier with the work done by Milltek Decking and RailingThey completely transformed my old deck into a stunning outdoor space that looks even better than I imagined. The team was professional, efficient, and paid great attention to detail. They used high-quality materials and ensured everything was done perfectly, from the sturdy framing to the beautiful finishing touches. Communication was excellent throughout the process, and they stayed on schedule while keeping the area clean and organized. If you’re looking for a reliable and skilled decking company, I highly recommend Milltek Decking and Railing - they truly exceeded my expectations!Trustindex verifies that the original source of the review is Google.
Kodi Lecates2025-02-06Incredible experience with Milltek! The deck looks stunning, and the whole process was seamless. Couldn’t ask for better service!Trustindex verifies that the original source of the review is Google.
J B2025-02-06Milltek Construction Company did an amazing job on our new deck!! The team was professional, efficient, and their skill, techniques, and finished product couldn't be any better!!! I am so impressed, and will definitely be working with them again, on all of my future projects. Highly recommend them for anyone looking to build or upgrade a deck... guaranteed you'll love it! :-)

Our Simple Deck Sunroom & Addition Construction Process
Bring Your Project To Life In Just Four Steps
1. Consultation and Assessment
We begin with a personalized consultation to understand your vision for your sunroom or home addition. During this meeting, we’ll discuss your goals, design preferences, and how you plan to use the space. Our team will assess your home’s layout and provide expert recommendations to create the perfect addition that enhances your living space and complements your home’s style.
2. Surface Preparation
Before we begin construction, we take care of all necessary permits and planning to ensure a smooth process. This includes obtaining the required approvals and preparing your home for the new addition. Our team will make sure everything is in place, from site preparation to any structural adjustments, ensuring your sunroom or home addition is built to code and ready for construction.
3. Professional Construction
Our skilled team begins the construction of your sunroom or home addition with precision and care. Using high-quality materials and expert craftsmanship, we ensure every detail is carefully executed. From framing to finishing touches, we take pride in delivering a sturdy, beautiful space that seamlessly integrates with your home and enhances its functionality. Each step is done with the utmost attention to detail to ensure a long-lasting and stunning result.
4. Final Walkthrough and Approval
Once your sunroom or home addition is complete, we’ll walk you through the finished space to ensure it meets your expectations. Your satisfaction is our top priority, and we’ll make sure every detail is perfect before considering the job done. We won’t leave until you’re thrilled with your new, beautiful addition.

Get A Free Estimate On A Deck Painting & Staining
Please fill out the quick form below to schedule a no-pressure, no-obligation quote on the cost of our deck painting & staining service
Need to contact us right away? Call Us: at (484) 214-2571 or fill out the form below.
Ready to expand your living space with a beautiful sunroom or home addition? Contact Milltek Decking & Railing today for a free consultation, and let’s bring your vision to life. Your perfect space is just a call away!