House Extensions and Architectural Design in Basildon
Kirkwood provides a complete residential design service for house extensions, loft conversions, and garage conversions across Basildon. We manage architectural drawings, planning applications to Basildon Council, structural engineering, and building regulations entirely in-house — then introduce homeowners to vetted local builders once the complete drawings package is ready.
Basildon is one of Kirkwood’s most active service areas. We work across the whole district — Basildon town, Pitsea, Langdon Hills, Laindon, Fryerns, Vange, Wickford, and the surrounding villages — and have an established relationship with Basildon Council’s planning department.
Basildon's #1 architectural design firm
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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.
Kirkwood projects
No nonsense, just expert home extensions in Basildon
Kirkwood are trusted Basildon architects with decades of experience in house extensions, loft conversions and renovation projects. We handle the full architectural design process, from planning permission and permitted development advice to detailed extension plans and building regulation drawings. Everything is clear from the start. You get high quality architectural plans, honest advice on build costs and access to builders we know and trust. No stress, no confusion. Just a well planned process that works.
What our customers say about us
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!!!
Planning the perfect home extension in Basildon
Every home extension comes with several factors that shape a successful design. Our architects carefully consider every detail, but here are some key elements we always prioritise.
Light and ventilation
Natural light and proper ventilation are essential for any home extension, enhancing both comfort and energy efficiency. Our Basildon architects carefully design with windows, skylights, and ventilation systems to create a bright, airy space that feels open and inviting. Whether it's a single story extension, loft conversion, or garage conversion, maximising natural light and airflow ensures your home extension is both practical and enjoyable to live in.
Design & layout
Our Basildon architectural design team ensures every inch of your home extension is used efficiently. From single story extensions and loft conversions to garage conversions, we design layouts that maximise space while keeping your home practical and stylish. Architects like us know a thing or two about designing new house layouts to suit the forever changing and busy lives of our customers
Materials for the job
The materials you choose play a key role in both the appearance and cost of your extension. Our Basildon architects help you select options that match your home’s style while staying within budget. From brickwork and roofing to glazing and finishes, every detail is carefully considered to create a seamless and cost-effective home extension.
Toucan way
Basildon, Essex
Single-story pitched roof extension with a new kitchen, downstairs shower & WC, underfloor heating (UFH) throughout, bifold doors with electric blinds, electric opening Velux windows, new boiler, and luxury vinyl tile (LVT) flooring throughout.
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Architectural design in Basildon
Basildon Council planning permission
When it comes to architectural design, we focus on delivering high-quality plans that offer great value for money. We also provide free initial advice, helping you understand the true cost of building before committing to design fees. This ensures you can plan with confidence, knowing exactly what to expect. Transparency is key, we’re here to guide you through the process, not just to sell a service.
If you’d like a free call with a local expert who knows the Basildon Council planning permission process inside and out, get in touch today!
Why good design is key to a successful extension in Basildon
A well-planned architectural design offers many advantages for homeowners in Basildon. That’s why working with experienced Basildon architects is essential to ensuring your home extension is carefully designed and meets the highest standards. From maximising space and natural light to securing planning permission, using expert architects for home extension design makes all the difference.
Architectural design in Basildon
Basildon Council planning permission
When it comes to architectural design, we focus on delivering high-quality plans that offer great value for money. We also provide free initial advice, helping you understand the true cost of building before committing to design fees. This ensures you can plan with confidence, knowing exactly what to expect. Transparency is key, we’re here to guide you through the process, not just to sell a service.If you’d like a free call with a local expert who knows the Basildon Council planning permission process inside and out, get in touch today!
Why good design is key to a successful extension in Basildon
Increase value
A well-designed home extension can increase your property’s value by up to 20%, making it a worthwhile investment. Whether you're planning to stay long-term or considering selling in the future, Kirkwood’s expertise in Basildon home extension design ensures your project is planned to the highest architectural standards.
Improved living space
One of the main reasons homeowners in Basildon choose architectural design services is to maximise their space. Whether you're extending your kitchen or creating a new living area, our architects work closely with you to design a home extension that blends functionality with style.
Linking the design
At Kirkwood, we understand the importance of ensuring your new house extension blends naturally with your existing home. Our architectural designs in Basildon are carefully planned to complement your property’s style and materials, creating a seamless and well-integrated finish.
Start Your Home Extension in Basildon – Speak to Kirkwood Today!
If you’re looking for house extension plans in Basildon, Kirkwood is here to help. Our experienced team of Essex Architects will guide you through every step, from the initial design stage to securing the necessary approvals. With our in-depth knowledge and attention to detail, we create designs that not only meet your needs but also enhance 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 home extension in Basildon!
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Frequently Asked Questions
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Do I need planning permission for a house extension in Basildon?
Most single storey rear extensions in Basildon qualify as permitted development. A Lawful Development Certificate is always recommended. Properties where previous extensions exist, or properties near the Green Belt around Langdon Hills and Laindon, may have different constraints. Kirkwood checks the planning position for every property before designing.
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Which council handles planning applications in Basildon?
Basildon Council is the local planning authority for the whole Basildon district — covering Basildon town, Pitsea, Langdon Hills, Laindon, Wickford, and surrounding villages. Kirkwood submits and manages all planning applications, Lawful Development Certificates, and prior approval applications to Basildon Council.
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How much does a house extension cost in Basildon?
A standard single storey rear extension in Basildon costs from £38,000 to £58,000 for the 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 for the complete professional package before work begins.
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Does Green Belt status affect my extension in Basildon?
Possibly. Parts of the Basildon district — including areas around Langdon Hills, Laindon, and western rural areas — fall within the Metropolitan Green Belt. Stricter planning rules apply in Green Belt areas. Kirkwood checks Green Belt status during the initial property assessment before designing.
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How do I book a free consultation for a Basildon extension?
Book a free Discovery Call. Kirkwood researches the property before the call — planning history, Green Belt position, PD allowance. You get your planning route, realistic costs, and fixed fees on the call. Call 01268 944233 or book at kirkwoodbuild.co.uk/quick-quote/