House Extensions and Architectural Design in Braintree
Kirkwood provides a complete residential design service for house extensions, loft conversions, and garage conversions across Braintree and the wider district. We manage architectural drawings, planning applications to Braintree District Council, structural engineering, and building regulations in-house, then introduce homeowners to vetted local builders once the full technical package is complete.
Braintree is in the northern part of Kirkwood’s Essex service area. We cover Braintree town, Witham, Halstead, Coggeshall, Great Notley, Sible Hedingham, and the surrounding villages. We deal with Braintree District Council regularly and understand the planning policies and house types across the district.
Braintree's #1
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of 5-star Google reviews
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A hassle-free service, packaged just for you
No matter where you are in Essex, we’re ready to assist
Precision-driven architectural design that delivers.
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No fluff, just well designed home extensions
What homeowners are saying
Based in Brentwood, Essex, we were also introduced to builders and tradespeople through Kirkwood, and they were excellent—professional, respectful, and a pleasure to work with. If we ever take on another project, we wouldn’t hesitate to use them again.
We now have an amazing extension, and would be happy to use the team again.







Very knowledgeable and contactable throughout the process.
Couldn't ask for a better outcome and value for money.
Will definitely be recommending and 100% will use again!
5 star!!!

Kirkwood is a family-run company with extensive experience in architectural design and planning permission for house extensions and loft conversions. As trusted Braintree architects, we provide upfront guidance on build costs, connect you with skilled builders, and create high-quality designs at competitive prices. Our approach ensures costs are managed effectively without compromising quality, delivering a smooth, efficient, and transparent process for your house extension.
- Avoid costly build errors
- Prevent council disputes
- Access reliable builders
What we do best
Services Kirkwood Provides in Braintree
Essential Design Considerations for House Extensions in Braintree
Light and ventilation
Natural light and ventilation play a crucial role in any house extension, enhancing both comfort and energy efficiency. Our Braintree architects design with well-placed windows, skylights, and ventilation systems to create a bright, open space that feels inviting and functional.
Design & layout
Our Braintree architectural design team ensures every part of your extension is utilised effectively. No matter the size of your space, we design layouts that maximise your home's potential while maintaining functionality and style.
Materials for the job
The materials you choose will greatly influence both the appearance and cost of your extension. Our architects in Braintree will guide you in selecting options that enhance your home's style while staying within budget.
Architectural design in Braintree
For years, we’ve been helping homeowners in Braintree design and plan high-quality house extensions. If you didn’t already know, Braintree has a deep history, with architecture that reflects its evolving character. If you’re searching for experienced Braintree architects, you’ve come to the right place. With extensive knowledge of the local council and planning process, we’ve successfully secured planning permission for single-story extensions, loft conversions, double-story extensions, garage conversions, and garden rooms across Braintree. For more details, see our Pitched Roof vs Flat Roof Extension Guide.
Reliable Braintree architects
Architectural design isn’t just about creating plans, it’s about delivering real value while maintaining the highest standards of quality. As Braintree architects, we provide expert guidance and free initial advice to help you understand the true cost of building before committing to design fees. This allows you to plan with confidence, knowing what to expect from the start. We believe in transparency, making sure homeowners get the right advice rather than just pushing for a sale.
If you’d like a free call with Braintree architects who know the process inside and out, get in touch today!
The Importance of a Well-Planned Architectural Design in Braintree
Increase value
A thoughtfully designed house extension can increase your property's value by up to 20%, making it a smart investment. Whether you're planning to stay for years or sell in the future, Kirkwood’s expertise in Braintree house extension design ensures your project meets the highest architectural standards.
Improved living space
Maximising space is a key reason homeowners in Braintree seek architectural design services. Whether you're extending your kitchen or creating a new living area, our architects collaborate with you to develop a design that blends functionality with style.
Linking the design
We understand how important it is for your new extension to feel like a natural part of your home. Our architectural designs in Braintree ensure your extension complements your property's style and materials, creating a cohesive and well-integrated look.
Ready to Begin Your House Extension in Braintree? Contact Kirkwood Today!
If you need architectural advise for a house extension in Braintree, Kirkwood is here to help. Our experienced team of Essex architects will guide you through every stage, from the initial design to securing planning approval. With our expertise and attention to detail, we create designs that not only meet your needs but also maximise your home’s potential.
Contact us at Info@kirkwoodbuild.co.uk or call 01268 944233 to schedule your free consultation and take the first step toward your dream house extension in Braintree!
Kirkwood articles
Straight-talking architecture
Braintree | Architectural Design & Planning
Serving Braintree & surrounding areas - CM7, CM8, CO9, CO6, CM77, CM1, CM2, CM3, CM4
Frequently asked questions
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Do I need planning permission for a house extension in Braintree?
Most single storey rear extensions in Braintree qualify as permitted development. However, properties in conservation areas (Coggeshall, Halstead, parts of Braintree town centre), listed buildings, properties in Great Notley with conditions removing PD rights, and rural properties near the Green Belt may need full planning permission. Kirkwood checks every property individually before designing.
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Which council handles planning applications in Braintree?
Braintree District Council covers the whole district — including Braintree town, Witham, Halstead, Coggeshall, Great Notley, and all surrounding villages. Kirkwood submits and manages all planning applications to Braintree District Council on behalf of clients.
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How much does a house extension cost in Braintree?
A standard single storey rear extension in Braintree costs from £38,000 to £58,000 shell build in 2026. A 4m x 4m flat roof extension with glass lantern starts from £43,000. Professional fees add 10 to 15 per cent. Kirkwood provides fixed fees before any work begins.
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Does Kirkwood cover Witham, Halstead and Coggeshall?
Yes. Kirkwood covers the whole Braintree district — Braintree, Witham, Halstead, Coggeshall, Great Notley, Hatfield Peverel, Sible Hedingham, and all surrounding villages. We deal with Braintree District Council regularly across all of these areas.
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Does Kirkwood do garage conversions in Braintree?
Yes. Garage conversions are popular across the Braintree district. Most garage conversions do not require planning permission, but Building Regulations approval is always needed. Kirkwood manages building regulations, structural engineering, and vetted builder introduction for garage conversions across Braintree.
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Does Kirkwood provide structural engineering in Braintree?
Yes, in-house. Foundation design, steel beam calculations, and building regulations drawings are produced by the same team as the architectural drawings. This avoids the coordination delays that arise when structural engineering is handled by a separate company.
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