Full Service Interior Design
At Katie Gelsheimer Design, we offer a structured, phase-based approach to interior design, guiding projects from initial concept through final installation. Our services are organized into two primary offerings: Construction + Hard Finishes and Furniture + Styling, allowing clients to engage at the level that best fits their project.
Our process begins with a consultation and concept design phase, where we define layout, function, and overall design direction. From there, we move into Design Development, refining the design through detailed selections, documentation, and coordination with the architect and builder to ensure the project is ready for construction. During construction, we provide design intent support, acting as a second set of eyes to ensure the design is executed as planned.
For furnishings, we guide clients through planning, sourcing, procurement, and final installation, resulting in a fully furnished and styled home.
Throughout each phase, our role is to provide clarity, structure, and thoughtful decision-making — ensuring a cohesive, functional, and well-executed result tailored to each client and project.
kitchen design
Katie Gelsheimer Design provides kitchen design services in the St. Louis area through a structured, phase-based approach that guides clients from initial concept through construction and final installation. The process begins with a Consultation and concept design, where layout, function, and flow are defined, followed by Design Development, where cabinetry, appliances, and material selections are finalized and documented for construction.
The team coordinates closely with contractors, cabinet makers, and appliance vendors to ensure the design is clearly communicated and aligned across all trades, while providing design intent support throughout construction. With a focus on thoughtful space planning, durable materials, and cohesive detailing, Katie Gelsheimer Design creates kitchens that are both highly functional and visually timeless for homes throughout Lake St. Louis and the greater St. Louis area.
bathroom design
Katie brings architectural knowledge and hands-on experience to our bathroom design process, translating functional requirements into beautiful, livable spaces. Katie collaborates with clients to balance layout, lighting, and storage, sources durable yet elegant materials suited for wet spaces, and coordinates with contractors to ensure the design is executed precisely. Her calm, thoughtful approach helps clients feel confident through the renovation process, while her attention to detail ensures each bathroom is both beautiful and highly functional for everyday life.
renovations + new builds
Katie Gelsheimer Design provides design services for whole-home renovations and new builds throughout the St. Louis area using a structured, phase-based approach. Beginning with consultation and concept design, we define layout, spatial flow, and overall design direction, ensuring the architecture and interiors are thoughtfully aligned from the start.
During Design Development, we refine the design through detailed selections and documentation, coordinating closely with the architect, builder, and trades to ensure all materials and details are clearly communicated and ready for construction. Throughout the build, we provide design intent support, serving as a second set of eyes to ensure the design is executed as planned.
With a focus on cohesive materials, functional layouts, and long-term durability, our work results in well-resolved, timeless homes tailored to each client and the way they live.
furniture + styling
Katie Gelsheimer Design offers furniture and styling services to transform completed spaces into cohesive, functional, and fully realized homes. Beginning with Planning + Sourcing, we develop furniture layouts, align selections with your lifestyle and budget, and source furnishings, rugs, lighting, and accessories that support the overall design direction.
Once selections are approved, we move into Procurement, managing ordering, vendor coordination, and delivery logistics to ensure a smooth process. The final phase, Install + Styling, brings everything together on site through thoughtful placement and layering of accessories, resulting in a finished space that feels intentional and complete.
With a focus on scale, proportion, and cohesive detailing, our furniture and styling service creates comfortable, livable spaces that reflect each client’s needs while maintaining a clean, timeless aesthetic.