Build outward
Room additions
Add a kitchen, living room, dining area, or utility space. Design the opening into the existing house so the new room improves how you move through the home.
Plan around
Footprint, flow, and the connection to your home
HOME ADDITIONS
Home Additions in Overland Park & Kansas City
When you love your location but the house needs more room, moving isn't the only answer. Built by Design plans and builds additions with one design-build team handling the design, scope, selections, and construction path together.
ADD ON WITH A PLAN
More room, or a better use of the space you have?
Built by Design plans and builds home additions across Overland Park, Johnson County, and the Kansas City area. Room, primary suite, and second-story additions start with the same question: what space is missing, and how should it connect to the house you already have?
An addition creates new enclosed space by building out or up. A whole-home remodel changes the rooms you already have. If the problem is a cramped kitchen layout or an unused lower level, explore kitchen remodeling or basement remodeling alongside expansion. Some projects need both new square footage and changes to adjoining rooms.
Our Overland Park kitchen and living-room addition shows that combination: new living space connected to an opened-up kitchen, refreshed fireplace, and mudroom-laundry. The new space carried through the home's character with wood ceilings and exposed beams.
Planning an addition in Parkville? Explore home additions in Parkville for site and existing-home planning decisions, a regional addition case study, and what to share when requesting a consultation.
Wondering what an addition costs? See our honest guide to home addition cost in Kansas City.
Every Built by Design remodel runs on our design-build process.
What we build
Addition types and related work
More space should feel like it belongs. Start with what your home needs, then plan how the new space connects to the rooms and routines you already have.
Create a private retreat
Primary suite additions
Bring bedroom space, bathroom access, and closet storage together. Plan for privacy and a comfortable route to the rest of the house.
Plan around
Plumbing, storage, and nearby rooms
Explore building upward
Second-story additions
Explore more space without a larger ground-level footprint. Foundations, framing, stairs, roof changes, utilities, and weather protection need feasibility review first.
Plan around
Structural feasibility before design details
Concept sketches, not construction plans.
Existing home
Possible new space shown in gold
Think beyond the new room
Expanded living spaces
Connect new square footage with the rooms around it. BBD's Overland Park addition brought an expanded kitchen, living room, fireplace updates, and mudroom-laundry into one coordinated project.
Related outdoor living
Coordinate patios, covered areas, and exterior updates with an addition. Outdoor work is a different scope from adding enclosed living space, so define which indoor and outdoor changes you need.
RECENT WORK
A completed addition and a related remodeling example
The Overland Park room addition shows new enclosed living space connected to the existing home. The basement and outdoor project offers a different comparison: making more of existing indoor and outdoor areas.
Overland Park Room Addition Remodel
Overland Park, KS
A 16-week Overland Park room addition added roughly 1,000 square feet, opened up the kitchen, created a huge living room, refreshed the fireplace, and added a mudroom-laundry area with a tiled dog wash.
Related remodel: Overland Park Basement Remodel and Outdoor Living Space
Overland Park, KS
This project improved the lower level and connected outdoor living space. Explore this related remodel for ideas about using existing indoor and outdoor areas, alongside your plans for new enclosed space.
Design-build · From brief to build
Our design-build process for additions
One plan for the space you're adding and the home you're keeping. Design, selections, and construction move forward together.
Plan the whole connection
Every connection matters.
A wall opening can change a beam. A roofline can change ceiling heights. We plan those connections before work begins.
- ARooflines
- Shape + weather protection
- BStructure
- Openings + framing
- CFoundation
- Support + connections
Illustrated concept, not a construction drawing.
Discover
Walk the home. Define the need.
Share your address, rooms, and priorities. An at-home walkthrough connects your wish list to the existing house and site so we can review the project's scope and fit.
Design
Test how the spaces connect.
Study circulation, daylight, rooflines, exterior materials, and utilities. Plan the new room and the adjoining rooms together, with feasibility guiding the design.
Verify
Resolve structure and approvals.
Review foundations, framing, and roof connections. Confirm project-specific engineering and approval needs with the relevant professionals and local building department before construction.
Specify
Bring selections and scope together.
Coordinate cabinetry, flooring, tile, fixtures, doors, windows, and exterior finishes with pricing. Keep the design decisions and construction expectations connected.
Build
Build with a plan for daily life.
Coordinate protection, demolition, structural work, rough-ins, finishes, and punch-list details. Discuss deliveries, separated work areas, and interruptions to rooms or utilities as part of the sequence.
PLAN THE CONNECTIONS
Plan the existing house as carefully as the new rooms
Layout and structure. Work backward from furniture, storage, and the routes between rooms. Identify where the existing house will open into the addition and which foundations, walls, and framing need review. Extra area won't help if the connection creates a narrow passage or interrupts the kitchen's working layout.
Rooflines and utilities. Consider roof connections, window placement, floor and ceiling heights, and exterior materials together. Plan how heating, cooling, electrical service, and any plumbing will reach the new rooms. A suite with a bathroom or a relocated kitchen has different utility needs from a living-room extension.
Access and daily life. Discuss where crews, deliveries, equipment, and stored materials will go. Work through the sequence for opening the house, temporary weather protection, and access to the rooms you use every day. Flag pets, work-from-home needs, and kitchen or bathroom availability before deciding whether to stay during the work.
Decisions to make before construction
- Addition cost and scope
Compare historical project ranges and the connection to the existing home.
- Evaluate building upward
Start with structure, stairs, roof work, and occupancy.
- Decide whether an addition is worth it
Separate daily usefulness from possible resale value.
- Roof integration
Plan the roof connection and weather protection together.
- Doors, windows, and trim
Consider continuity between the original home and new space.
FAQAnswers, by design
Home Addition Questions
Practical planning context for your project. Your project team confirms what applies after a walkthrough and written scope review.
Will the scope include work inside the existing house?
It can. Openings between old and new rooms, flooring transitions, relocated fixtures, and utility connections may extend the work beyond the new room. Identify which adjoining rooms will be affected and include their repairs and finishes in the scope discussion. The Overland Park addition combined new living space with an opened-up kitchen and refreshed fireplace.
Is it cheaper to add on or move?
It depends on the home, the lot, the market, and the kind of space you need. Adding on can make sense when you love your location and the existing home is worth improving. Moving can make sense when the structure, lot, or neighborhood limits the project too much. Built by Design starts by looking at the home and the goal so the conversation is grounded in real scope instead of a generic comparison.
How long does a home addition take?
Timeline depends on design, engineering, permitting, structural work, weather, materials, selections, and how much of the existing home is affected. The Overland Park room addition in the portfolio took 16 weeks, but that's one documented project, not a promise for every addition. Built by Design discusses schedule after the plan and scope are clearer.
Can you add a second story to an existing home?
Sometimes. A second-story addition depends on the existing foundation, framing, roof, stairs, utilities, layout, and the way the home can be protected during work. It can be a smart way to gain space when the lot is tight, but feasibility should be reviewed before a homeowner commits to drawings.
What affects the cost of a room addition?
Cost is shaped by size, foundation work, structural changes, rooflines, windows, exterior materials, mechanical systems, plumbing, electrical work, interior finishes, cabinetry, tile, flooring, and how cleanly the new space connects to the old home. Early planning helps separate must-have scope from nice-to-have details.
Can we live in the house while an addition is built?
That depends on which rooms and systems the work affects. Before deciding, discuss safe access, separation from construction, weather protection, and whether a kitchen, bathroom, heating, cooling, and utilities can remain usable. Opening the existing house to the addition can change that plan during construction. Don't assume you can stay throughout every phase; agree on the arrangements for your specific scope.
What should I bring to an addition consultation?
Start with your address, the rooms you need, what isn't working now, and any preferences about building out or up. Note concerns about yard access, pets, daily routines, and rooms you need to keep using. Existing plans or photos can be discussed after the initial request; you don't need a completed design to begin.
Does Built by Design handle design and construction?
Yes. Built by Design is a design-build remodeler, so one team helps with planning, design direction, selections, scope, construction, and communication from the first walkthrough through the finished addition.
READY TO PLAN YOUR ADDITION?
Bring Built by Design to your home addition conversation
Tell us where your home is, what space you need, and whether you're considering building out, building up, or reworking existing rooms. We'll review the scope and fit, then discuss a consultation and the planning needed before pricing and scheduling.