Home Additions In St. Charles, MO

Bright empty living room with light wood floors, desk and chair, and sofa near large windows
Empty garage with unfinished wood walls, concrete floor, windows, and a closed garage door.

Home Additions

Running out of space does not always mean it is time to leave the home you already love. Many homeowners simply need more room for daily life, a growing family, or changing needs over time. Hanson Design and Build builds home additions including expanded kitchens, garage extensions, second-story additions, sunrooms, and flexible living spaces designed to blend naturally with the rest of your home. We focus on creating additions that feel functional, comfortable, and like they were always part of the original layout.


We know adding onto your home is a major investment, which is why careful planning and communication matter from the beginning. Our team handles everything from design development and project planning to coordinating the trades and keeping construction moving smoothly from one phase to the next. Because home additions can impact your daily routine for weeks or months, we make a strong effort to keep the job site clean, organized, and as manageable as possible for your family. The end result is added space that feels intentional, functional, and naturally connected to the home you already enjoy.

Kitchen Remodeling

Bathroom Remodeling

Deck Building

Home Additions

Custom Home Construction

Basement Finishing

Home Buying & Selling Assistance

Shed Installation

Our Remodeling & Construction Services