S E R V I C E P O R T F O L I O :
Additions & Expansions
Home addition in Kansas City
For homeowners in Kansas City's established neighborhoods, a significant home addition isn't about square footage. It's about making the home work for the next phase of life without sacrificing the character, proportions, and architectural details that made you choose it.
Martanne Construction builds substantial, architecturally integrated home additions in Kansas City: multi-room additions, kitchen additions, second-story additions, primary suite additions, and in-law or guest suites. We work most often on older homes in Leawood, Mission Hills, Prairie Village, Overland Park, Bookside, and Waldo, The Country Club Plaza, Hyde Park, where a new addition must feel considered from every angle, inside, outside, and in the way the home lives day to day.
If you're planning a $200K to $1M+ addition to a home you already love, we can help you understand what's possible, what's practical, and how to move forward with confidence.
Additions Designed to Match the Home You Already Love
The best home additions do not stand out as new. They respect the original home’s rooflines, materials, window rhythm, trim profiles, scale, and flow. They solve functional problems without creating architectural ones.
That level of integration is especially important in Kansas City neighborhoods where homes have character that cannot be replaced, such as traditional Leawood homes with established streetscapes, Mission Hills residences with timeless proportions, Prairie Village homes with refined updates over time, and Overland Park properties where families want more space without leaving the neighborhood they know.
Martanne approaches each addition as both a construction project and an architectural challenge. Before walls open or foundations poured, we study how the new space should connect to the existing home: how natural light will move through the rooms, how circulation will improve, where structural support is needed, and which exterior details must be carried through, so the finished addition feels intentional.
Whether the project is a kitchen addition that becomes the center of the home, a second-story addition that creates room for a growing family, or a multi-room addition that reshapes how the entire first floor functions, the goal is the same: a finished space that feels like it has always belonged.
Our Process for Complex Additions
Of course, a major home addition takes craftsmanship. However, clear planning, careful coordination, and open, consistent communication from the first conversation through the final walkthrough are just as critical.
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We begin by listening. What no longer works for you about the home? How do you want the addition to affect daily life? What are the priorities, constraints, and long-term goals? This conversation guides the scope and determines whether architectural, engineering, or permitting considerations are needed early on.
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Some clients already have an architect involved. Others need help finding the right architectural partner for the home and scope of work. Martanne can collaborate with your chosen architect or we can bring in our recommend trusted architectural partners. During this phase, we evaluate constructability, layout decisions, finish expectations, and the details that affect both investment and outcome
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Complex additions often involve foundations, load-bearing walls, roofline changes, second-story loads, utility relocation, and transitions between old and new construction. We review these carefully, so the plan is not only beautiful, but buildable.
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Once the design direction is set, we coordinate the details to move into construction. This may include permitting, trade coordination, material planning, schedule development, and preparation for how construction will impact the home, family and neighbors while work is underway.
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During construction, Martanne manages the moving parts: crews, subcontractors, inspections, scheduling, communication, and quality control. When you are investing in a high-value addition, this level of project management matters. You should know what is happening, what decisions are coming next, and how the work is progressing.
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Your addition closes with a detailed walkthrough and the assurance of Martanne’s 12-month “Fix It Free” warranty.
Home Addition Types We Specialize In
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A kitchen addition can change everything. For many Kansas City homeowners, the existing kitchen is too enclosed, too small, or disconnected from the family’s lifestyle. A well-planned kitchen addition creates space for cooking, gathering, entertaining, storage, and natural light while improving the flow of the entire first floor. Martanne sees the kitchen as both a working space and the architectural center of the home.
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A primary suite addition creates privacy, comfort, and long-term livability. These additions may include a larger bedroom, custom closet space, a thoughtfully designed bath, improved natural light, and better separation from the home’s shared spaces. The best primary suite additions feel elevated and personal while remaining true to the home’s existing architecture.
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A second-story addition takes careful planning, structural review, and a clear understanding of how the new level will affect the home below. These projects can be an excellent solution when the lot does not allow for outward expansion or when homeowners want additional bedrooms, bathrooms, office space, or family living areas without losing outdoor space.
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For larger homes or more complex needs, a multi-room addition can rework the way the entire home functions. These projects may combine a kitchen expansion, family room, mudroom, pantry, laundry, guest space, or new bedroom suite into one cohesive plan. Martanne helps homeowners think beyond square footage and consider how each room connects to the next.
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In-law suites and guest suites require a balance of comfort, privacy, accessibility, and connection to the main home. These additions support extended family, long-term guests, aging parents, or flexible future use. Details such as entry points, bathroom access, storage, sound separation, and natural light all shape how well the space works over time.
Neighborhoods We Serve
Martanne Construction works with homeowners throughout the Kansas City area, with an established reputation in established neighborhoods where thoughtful design and careful construction are nonnegotiable.
These include:
Olathe
Fairway
Kansas City, Missouri
Stilwell
Shawnee
Johnson County communities
Leawood
Lenexa
Loch Lloyd
Mission Hills
Prairie Village
Overland Park
Additional Portfolio Recommendations
Recent Home Addition Work
Browse our additions and whole-home renovations throughout the Kansas City area, including projects in Prairie Village, Leawood, Overland Park, and surrounding communities. Each project reflects the same priorities we bring to complex additions: thoughtful planning, careful construction, and details that feel connected to the original home.
Frequently Asked Questions
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Home addition cost depends on the size, structural complexity, finishes, site conditions, and whether the project includes kitchens, bathrooms, second-story construction, or major mechanical updates. In Kansas City, substantial home additions range from $150K–$500K with larger multi-room additions or highly customized projects exceeding that range. Martanne provides guidance early in the process so homeowners can understand what level of investment aligns with their goals.
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Choosing the right remodeling partner is less about finding the lowest estimate and more about finding the right fit for the scope and value of the project. Look for a home addition contractor with relevant portfolio depth, strong communication practices, proven project management, appropriate credentials, references, and experience working on homes like yours. For major additions, process and trust matter as much as craftsmanship.
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Timelines depend on design complexity, permitting, engineering, material selections, and construction scope. A primary suite or kitchen addition may take several months from planning through completion. Larger multi-room additions or second-story additions may take a couple more months, especially when architectural design, structural engineering, and major systems coordination are involved. During the planning phase, Martanne sets a realistic timeline, so homeowners understand what to expect before construction begins.
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Both. Martanne collaborates with your chosen architect or can recommend trusted architectural partners when the project requires one. Our team should be involved in the planning and construction conversation so the design can be evaluated for functionality, budget alignment, structural needs, and buildability before construction begins.
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This is one of the most important outcomes of a well-executed addition. Martanne accounts for the existing home’s proportions, rooflines, exterior materials, window placement, trim details, and interior flow so the new space feels connected to the original structure. The goal is to add space with an addition that looks and lives as though it belongs.
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Martanne builds kitchen additions, primary suite additions, second-story additions, multi-room additions, in-law suites, guest suites, screened porches, and other custom expansion projects. The best fit is typically a substantial addition where design, structure, craftsmanship, and project management all need to function together.
Start a Conversation About Your Home Addition
A major addition begins with listening. Whether you are expanding a kitchen, adding a primary suite, planning a second story, or considering a multi-room addition to a home you plan to stay in for years, Martanne can guide you forward.
Tell us what you are imagining, what no longer works, and what you want the home to become.
