Home Additions in St. Louis
As your family grows or changes, a home that once felt right can begin to feel cramped. Hercules Design Build offers trusted solutions for homeowners across the greater St. Louis area, designing spaces that seamlessly blend with the existing structure. Our additions let you stay in the home you love, with a design that feels like it’s always belonged.
Custom Home Additions
There’s a difference between just adding space and adding value. Hercules Design Build takes a thoughtful approach and asks how that new space truly connects to the home: how it functions, how it flows, how the sightlines feel, and how the exterior integrates with what’s there.
In the end, our team will give you a home that works for your lifestyle. You may want to:
- Create a new bedroom and en suite bathroom for a growing family.
- Expand the kitchen with a walk-in pantry and built-in bar.
- Build a dedicated home office for remote or hybrid work.
- Add a laundry room and walk-in closet for improved storage.
- Increase space in the living room for a more comfortable layout.
We’ll work with you to evaluate your lot, define what you want to accomplish, and answer your questions.
Your Custom Home Addition Cost
Home addition costs vary by project. Several factors, from the scope and materials to structural changes, influence the final outcome.
Additions come in many forms, including a new room, a second floor, or a bump-out that extends an existing space. Accessory dwelling units offer a secondary structure that can serve as a guest house, creative space, or rental property. You can also convert an outdoor porch into an indoor sunroom or build an over-garage addition for extra living space.
Our process keeps cost aligned with your needs. We’ll make structural changes to the existing home if needed, integrate modern amenities, and choose materials that feel intentional. Staying on budget is a top priority, and we’ll be transparent about where your money is going, making it easier to plan with confidence.
Trusted by Homeowners
See why families in St. Louis trust us for their home remodeling projects.
Hercules Design Build performed some remodel work on our kitchen, mud room/office and bedroom. David and his staff were very professional and help us through the entire remodeling process. We lived in the house during the remodel and they worked with our schedule (even the nap time schedule for our kid). The workers cleaned up after every day and the living areas of the house were kept clean even during demolition. I recommend Hercules Design Build for anyone looking for a home remodel. They helped us from design to build and more.
Andre N.
We have completed 3 projects with Hercules Design and Build: 2 exterior (siding/porch) and recently a large renovation of our kitchen, powder room, mudroom, and laundry room. This included a small addition. They have always been excellent to work with, they are committed to satisfying the customer, and they are transparent and collaborative when any issues arise. They are excellent, trustworthy people, and we are so happy with our results!
Colleen K.
Hercules Design and Build did an exceptional job on my first floor remodel including a new kitchen. I also had new wood floors installed in my family room and refinished the existing floors to match. Dina, the designer, took time to help me choose exactly what I was envisioning including cabinets, hardware, light fixtures and paint colors. On the construction side, everyone was very meticulous with their work and was very pleasant to have in my house. I can not recommend Hercules Design and Build highly enough.
Robin M.
Improve Your Lifestyle
If you’re looking for more room to live, work, or entertain, building an addition to your house can be the perfect solution. As our team knows, expert planning and craftsmanship make all the difference. Reach out to make the lifestyle you envision a reality.