Home Additions in St. Louis
Stay in the home and neighborhood you love—just with the extra space your family needs.
How We Approach Home Additions
Adding onto an existing home is more complex than starting fresh. The new space has to respect the original architecture—matching proportions, rooflines, materials—while also improving how the whole house functions. Most importantly, it needs to feel intentional, not tacked on. That’s where thoughtful design makes all the difference.
Anthony personally walks every addition project, studying how your home sits on the lot, where natural light falls throughout the day, and how the existing structure will integrate with new space. He’s looking at sightlines from inside and out, thinking about how rooms will flow into each other, and considering how an addition changes your relationship with your yard and outdoor areas. It’s this kind of site-specific attention that keeps additions from feeling like afterthoughts.
The technical work matters just as much. We’re planning for proper foundation integration so nothing settles unevenly. We’re sizing HVAC correctly for the added square footage and planning electrical capacity for how you’ll actually use the space. We’re thinking about structural loads, waterproofing connections between old and new construction, and ensuring your addition will perform as well as it looks for decades. That’s the kind of forward planning that protects your investment.
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Our Home Additions
Browse recent home additions we’ve completed across the St. Louis area. Each project shows how new space can feel like it’s always belonged.
Testimonials
Here’s what homeowners in Clayton, Kirkwood, and across the Greater St. Louis area say about working with us.
Our Process
From the first meeting to your finished home addition, we handle the details and keep you in the loop—no juggling vendors or wondering what happens next.
Consultation & Site Visit
We walk your property together, discussing your goals and evaluating how an addition might work with your existing home and lot. You’ll get a clear sense of possibilities and considerations before moving forward.
Design, Scope & Budget
We develop detailed design plans and pricing for your addition. Whether starting from scratch or working with existing plans, you’ll know exactly what’s involved and what it costs before making any decisions.
Plans, Permits & Scheduling
We handle all engineering, architectural drawings, and permitting required by your municipality. Once approvals are in place, we establish a realistic timeline and communicate the construction schedule clearly.
Construction & Final Walkthrough
Construction moves forward with regular updates about progress. Our team coordinates all trades and manages quality at every phase. We conduct a final walkthrough to ensure everything meets your expectations.
FAQs
Common questions about home additions in St. Louis.
What should I think about before starting a home addition?
Consider what you really need—more bedrooms for a growing family, a main-floor master suite for aging in place, a dedicated home office, or space for visiting relatives. Think about how you want to use your outdoor space afterward, since additions often change your yard. Also picture how the addition will look from the street and whether it fits with your neighborhood’s character.
How much does a home addition typically cost?
Cost depends on size, complexity, and what you’re building. A second-story addition costs more than building out since we’re working above existing structure. Features like vaulted ceilings, premium materials, or connecting new HVAC systems all affect pricing. We provide detailed estimates after evaluating your specific home and goals, so you understand exactly what you’re investing in.
How long does a home addition usually take?
Timeline varies based on the size and complexity of what you’re building. A smaller addition with simpler features takes less time than a larger, more elaborate project. We’ll give you a clear timeline specific to your goals during the consultation.
What makes Arch Front Construction different from other home addition contractors?
We approach every bathroom as a design problem first—not just updating finishes, but rethinking the layout and flow to create a space that works better for you. You work with one dedicated person from design through construction, and we focus on finish quality that holds up years later.
Should I build up or build out for my addition?
It depends on your lot, local setback requirements, and what you’re trying to achieve. Building out works well if you have yard space and want main-level living—great for master suites or family rooms. Building up maximizes your footprint but requires foundation reinforcement and more complex structural work. We’ll evaluate both options during your consultation and explain the tradeoffs for your specific situation.
Do I need permits for a home addition?
Yes, all home additions require building permits in Greater St. Louis municipalities. We handle the entire permitting process, including any required engineering drawings and inspections. This ensures your addition is built to code and protects your home’s value and insurability.
Will my home addition increase my home’s value?
A well-designed addition that blends seamlessly with your existing home typically adds significant value, especially for functional spaces like master suites or additional bedrooms. The return depends on how well the addition integrates architecturally and how it compares to other homes in your neighborhood. We can discuss realistic value expectations during your consultation.
Can I stay in my home during the addition?
Usually, yes, though there will be some disruption depending on the scope. We coordinate work to minimize impact on your daily life and clearly communicate when utilities or access might be temporarily affected. For additions that tie into existing living spaces, we plan the connection work carefully to limit the time your home is open to the elements.
Ready to explore how an addition could work for your home?
Anthony will walk your property, discuss possibilities, and help you understand what’s involved. Call us or fill out the form to schedule your consultation.
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Get in Touch
Questions about your home addition project? Call us at 314-853-4019 to schedule a consultation. We meet at your house to walk through your space and talk about what makes sense for your project.
Call Us
314-853-4019
Where We Work
The St. Louis Metro Area Including
St. Louis County
St. Louis City
St. Charles County
Jefferson County