The first floor is where your home reveals itself — where mornings begin, evenings settle in, and your family finds its rhythm. When that space isn’t working the way it should, everything feels a little harder than it needs to be.
One Twenty One Design & Build specializes in first floor remodels throughout Chester County & Southeast PA. We’re a design-build firm based in Downingtown — we handle everything in-house, from the first conversation to the final detail. Before any demolition begins, you’ll be able to explore your fully reimagined first floor in detailed 3D — complete with every layout and finish thoughtfully planned in advance. That clarity is what separates a confident remodel experience from a stressful one.
An open concept kitchen and living room built around how your family gathers — not how the original builder divided the rooms.
A well-designed kitchen doesn't just work better — it becomes the place the whole family ends up gathering.
A first floor with every space feeling cohesive and thoughtfully designed — not updated room by room over the years.
Older homes were built for different eras. A thoughtful remodel makes the space work for how your family lives today.
The kitchen is where your household actually runs. It's where the day begins, where everyone eventually lands, and where a well-designed layout pays off in ways you’ll appreciate every single day. If yours no longer reflects how your family lives — or simply doesn't feel the way it should — then a kitchen remodel is a great place to start.
A structural remodel like this requires careful planning. When the kitchen, dining room, and living space open into one connected space, the whole house evolves and works the way your family uses it. An open floor plan conversion is one of the most impactful changes you can make to a first floor, and one of the most technically demanding. We handle all aspects and craft a space that works for you.
Ready to upgrade more than just your first floor, or simply running out of space? It might be time for a home addition, or tackling other areas of the home. Ask about our master plan, which incorporates a holistic design approach that can be broken up into multiple phases.
We come to your home, listen to how you use the space, and talk through what’s possible. No agenda other than understanding.
Before we touch anything, you’ll see three full 3D renderings of what your redesigned space and floor plan could look like.
Our in-house designers take the time to understand how you live and what you love, then help you pull it all together — from flooring and cabinetry to the hardware and fixtures that tie the space together. You’ll see exactly how your space will look before we even begin construction.
Our project managers handle all the details, turning the designs into a reality, keeping you informed throughout. No chasing or wondering where things stand.
We don’t hand your design to a separate builder. The same team that designs it builds it — less translation errors AND NO gaps in accountability. It's how we approach every remodel project we take on.
Seeing your space in 3D before construction isn’t just reassuring — it’s how you make confident decisions instead of guesses. What you approve is what gets built.
Renovation projects should be genuinely enjoyable. Working with us doesn't feel transactional — it feels like building something together. That’s by design.
or call us at (484) 630-3420