Home Additions

Design a Home Addition Built to Last that Compliments Your Style

Brickmoon Design’s residential architecture practice designs home additions making them look like they were always part of the original structure. The firm combines architectural expertise with integrated interior design, handling everything from structural coordination and permitting through interior selections and construction oversight.

The firm serves homeowners across all over Texas such as Greater Houston, Austin, and the Texas Hill Country who want more space without the disruption of a move — and who want that space to genuinely belong to the home it’s attached to.

The Home Addition Design Process

From the first site visit through construction, Brickmoon manages every phase of the addition design process.

Design for Integration

The addition should feel like it truly belongs – not just bigger, but aligned in its rooflines, consistent in its materials, and coordinated in its window patterns. An addition that looks intentional from the street requires deliberate design thinking — not just construction competence.

Understand the Program

We ask how the space will be used before any direction is proposed. A growing family needs something different than a home office. The specific use shapes every design decision from the first sketch forward.

Explore the Options

We present possibilities before committing to a direction. Second story, rear expansion, side addition, ADU — not every option fits every lot or structure. We explore what works within the real constraints of the property.

Detailed Design

Every material, window, and finish is specified. Kitchen and bathroom layouts are coordinated with plumbing and structural systems from the start.

Handle Permitting

We manage the full permitting process — building codes, setback requirements, and city-specific review. Permitting for additions varies significantly across counties. Brickmoon handles it from submission through approval.

Oversee Construction

We make regular site visits to verify the build matches the approved design. Issues are caught early. The project concludes with a final walkthrough confirming every detail has been executed as designed.

Types of Home Additions

Brickmoon Design handles home additions of all kinds. Here are the most common.

Second Story Additions

Adding an entire floor without expanding the footprint. Second stories are designed so the roofline flows naturally from the existing structure — they read as original, not added.

Rear and Side Expansions

Horizontal additions for kitchen expansions, primary suites, family rooms, and mudroom buildouts. Foundation, framing, materials, and mechanical systems are coordinated so the new space connects seamlessly with what’s already there.

ADU Design

A separate dwelling on the property — guest house, rental unit, or independent suite for extended family. Brickmoon knows current ADU requirements across Houston, Austin, and Hill Country jurisdictions and evaluates feasibility before the design begins.

Guesthouse Design

A separate structure for guests or long-term family use. We can help create a space where comfort, privacy, and connection all coexist.

Pool House Design

Cabana, changing rooms, wet bar, or outdoor retreat — designed around how the property is actually used. Materials and rooflines coordinate with the main house so the site reads as one composed design.

Garage Design and Conversions

New garages, additions, and garage-to-living conversions. Roofline coordination, material matching, and structural evaluation are handled architecturally — not as a construction afterthought.

Why Choose Brickmoon for Home Additions

Learn more about the firm and the experience behind every Brickmoon project in Texas.

  • Architect-Designed, Not Contractor-Built — Contractors know how to build. Architectural design goes beyond construction competence. Brickmoon designs additions so the rooflines flow, the materials carry through, and the proportions respect what’s already there.
  • Regulatory Experience Across Texas — Setback requirements, height limits, neighborhood character guidelines, and historic district rules vary significantly across but not limited to Houston, Austin, and Hill Country counties. Brickmoon navigates these requirements before the design begins — not after the first rejection.
  • Integrated Interior Design — New square footage needs to work inside as well as outside. Brickmoon’s interior design team coordinates finishes, fixtures, and layouts for the new spaces alongside the architectural work — so the addition is complete, not just structurally sound.
  • Historic District Experience — From Houston Heights, Tarrytown, and Austin’s historic overlay districts each have design review requirements that can stop a poorly planned addition before it starts. Brickmoon knows these guidelines and designs within them.
  • Two-Office Texas Coverage — Brickmoon operates from Houston and Wimberley. The firm serves homeowners across Greater Houston, Austin, Hill Country, and surrounding markets with direct knowledge of the permitting environments and building contractors all across Texas.
  • Award-Winning Work — Houston’s Best Prism Award, multiple Star Awards, and consecutive Best of Houzz recognition. The standard applied to custom home projects is the same standard applied to every addition Brickmoon designs.

What Our Clients Say

Brickmoon Design’s client reviews reflect a consistent experience — careful listening, precise execution, and additions that feel like they were always part of the original home. Read what past clients say firsthand.

 
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Howard Dierking profile picture
Howard Dierking
14 February 2026
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We worked with Brickmoon to design a Texas-modern cabin on our ranch in central Texas. The team handled site planning, architecture, and interior design and was on top of every detail through every phase of the project. They were incredibly communicative with everyone participating and took all the time needed to explain the details to us. After working with the Brickmoon team, not only do I absolutely love the result, but I feel like a better informed homeowner and steward of the house, and I look forward to working with the team again on future projects.
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Ryan Dibble
20 October 2025
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The entire team at Brickmoon has been great to work with. They design some really special plans and provide all the details we need for a successful project. They have gone above and beyond to get us things quickly when needed. Look forward to working with them for a long time!
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Mark Kaufmann
8 October 2025
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We had a wonderful experience with Karen and her team at Brickmoon Design! They were engaging, professional, talented and timely - we are excited to see the beautifully designed house come to life as we build it on Lot 2 in Ranches @ Dripping Springs!
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Austin Woodruff profile picture
Austin Woodruff
7 October 2025
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Working with Brickmoon Design has been a true bright spot in our construction process. Their team is collaborative, creative, and incredibly detail-oriented — always staying mindful of both the design vision and how it translates in the field. They’ve made it easy for us as builders to move forward confidently at every stage. If you’re looking for an architecture and design firm that brings both beauty and buildability to the table, Brickmoon is top-tier. Grateful for the partnership and looking forward to many more projects together.
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Clay Bass
6 August 2025
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We’ve had the pleasure of working with Brickmoon Design on multiple projects, and every time feels like teaming up with the Charlie’s Angels of architecture — sharp, creative, and always ready to solve a problem with style. Their designs are thoughtful and inspiring, but what really stands out is how well they balance vision with practicality. They’re collaborative, detail-oriented, and always keep the client at the center of the process. When Brickmoon is leading the design, we know we’re building something special.
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Nathan
29 July 2025
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Brickmoon’s thoughtful designs and responsive teamwork make our builds run smoothly and elevate the finished home. We love collaborating with them.
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Montana Elliott
21 May 2025
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Working with the team at Brickmoon Design has been such a rewarding experience. Their designs are thoughtful, timeless, and deeply rooted in both functionality and beauty. As a design partner, they bring a collaborative spirit and a high level of professionalism to every project.
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Lara Kennedy
4 March 2025
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We are a custom home builder in the Wimberley area and LOVE working with Brickmoon. Their team is attentive, organized, great communicators and they have the most beautiful designs. We always look forward to collaborating with them on a project. Highly Recommend!
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Clayton Blount
26 February 2025
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Always love collaborating with Brickmoon. Their service to their clients is seamless and their designs are amazing!
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robert brandon currey
31 October 2024
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As a custom home builder I have thoroughly enjoyed working with Brickmoon. Their entire team is incredibly easy to work with. Their designs are beautiful & very well detailed. Their communication is top notch. I would highly recommend BrickMoon design for anyone looking for a quality architecture team.

Contact Brickmoon Design

Schedule a consultation with Brickmoon Design to discuss custom home design, remodels and home additions. 

Houston Headquarters
7155 Old Katy Rd, Suite N190
Houston, Texas 77024

Central Texas / Hill Country Office
105 Malone Drive
Wimberley TX 78676

Residential Arcitect FAQs

Is an architect necessary for a home addition?

Legally, no — for some projects. Practically, yes. An architect ensures the addition looks intentional, integrates properly with the existing structure, and navigates permitting without costly rejections. A contractor can build something that functions. An architect designs something that belongs. For any addition that touches the roofline, the foundation, or the mechanical systems, architectural involvement isn’t optional — it’s the difference between an addition that adds value and one that doesn’t.

How long does the home addition design process take?

Design typically runs 2–4 months depending on project complexity. Permitting adds 1–3 months depending on the jurisdiction — Houston, Austin, and Hill Country cities each move at different speeds. Brickmoon sets realistic timelines from the initial consultation so the schedule reflects the actual permitting environment, not an optimistic estimate that slips.

Can Brickmoon design an addition that matches an existing architectural style?

Yes. The firm works across all residential styles — traditional, modern, farmhouse, transitional, Craftsman, Mediterranean, and Hill Country vernacular. Style matching is one of the primary design challenges in addition work, and it’s one Brickmoon approaches deliberately — rooflines, materials, window proportions, and exterior detailing are all studied against the existing structure before any new design is proposed.

What if the lot is small or has unusual constraints?

Constrained lots require more careful design thinking — not a different firm. Brickmoon has designed second stories, creative side additions, and ADUs on properties that initially seemed too small or too irregular for expansion. Sometimes vertical is the right answer. Sometimes a compact but well-designed addition delivers more usable space than a larger but poorly planned one.

Can a garage be converted to living space?

Yes, but it requires architectural involvement to do it correctly. Proper permits, structural assessment, mechanical system updates, and covered parking replacement requirements all need to be addressed before and during the conversion. Brickmoon handles these as an integrated design and permitting process — garage conversions done without architectural oversight frequently fail inspection or create problems that cost more to correct than the original project.

How does Brickmoon ensure an addition looks like it belongs?

Rooflines, materials, window alignment, and proportions — every exterior detail is studied against the existing structure before the design is finalized. This isn’t a checklist. It’s a design process that starts with understanding the existing home’s logic before proposing anything new. Additions that look added are the result of skipping that step. Brickmoon doesn’t skip it.

What building codes apply to home additions in Texas?

Texas home additions are governed by local city building codes, zoning ordinances, and — in some cases — HOA and historic district guidelines. Requirements vary by city and by addition type. Brickmoon manages code compliance from design through permit submission and construction inspection, so the addition is built to code from the first drawing rather than corrected during the build.

What is the difference between architecture and interior design?

Architecture designs the building itself — structure, systems, and spatial organization. Interior design determines how those spaces are finished, furnished, and experienced day to day. Combining both under one firm produces far better results.

Does Brickmoon handle additions outside Houston and Austin?

Yes. Brickmoon serves homeowners across Greater Houston, Austin, the Texas Hill Country, and surrounding markets from two offices — Houston and Wimberley. The firm has completed addition projects in the Hill Country, lake communities, San Antonio corridor, and various Houston and Austin suburbs. Projects are evaluated based on location, scope, and permitting environment.

Related Resources

The Brickmoon residential architecture blog covers the custom home design process, Texas Hill Country building considerations, interior design integration, and everything homeowners need to know before starting a project in Texas.

Get In Touch

At Brickmoon Design, we believe the best projects start with great conversations. To make sure our first virtual meeting is as valuable as possible, we'd like to understand your vision, goals, and project details upfront. This helps us come prepared with ideas, insights, and solutions tailored specifically to your needs.

Trustindex
Trustindex star 1Trustindex star 2Trustindex star 3Trustindex star 4Trustindex star 5
4.9
verified by Trustindex
Trustindex verifies that the company has a review score above 4.5, based on reviews collected on Google, Home Advisor, Houzz over the past 12 months, qualifying it to receive the Top Rated Certificate.

Get In Touch

At Brickmoon Design, we believe the best projects start with great conversations. To make sure our first virtual meeting is as valuable as possible, we'd like to understand your vision, goals, and project details upfront. This helps us come prepared with ideas, insights, and solutions tailored specifically to your needs.

Trustindex
Trustindex star 1Trustindex star 2Trustindex star 3Trustindex star 4Trustindex star 5
4.9
verified by Trustindex
Trustindex verifies that the company has a review score above 4.5, based on reviews collected on Google, Home Advisor, Houzz over the past 12 months, qualifying it to receive the Top Rated Certificate.