Canvey Island's #1
architectural design firm

with the highest number of
5-star Google reviews

5 star Google reviews from happy Canvey Island home extension clients
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A secure and dependable company you can trust

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A hassle-free service, packaged just for you

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No matter where you are in Essex, we’re ready to assist

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Precision-driven architectural design that delivers.

With 5,000+ projects to our name

No fluff, just well designed home extensions

The brains behind the bricks

Kirkwood is a family-run business with deep expertise in house extensions and loft conversions. As trusted Canvey Island architects, we offer upfront guidance on build costs, link you with high-quality builders, and deliver premium designs at competitive prices. Discover what a house extension might cost in Canvey Island. Our unique approach keeps expenses low without compromising quality, providing a fast, efficient, and transparent process for a stress-free extension experience. Need help selecting a reliable builder? Check out our guide.

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5.0
Based on 60 reviews
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Freyja profile pictureFreyja
19:14 01 Feb 25
We’ve worked with residential architects before, but Jamie and his team, especially Nathan, were fantastic. Kirkwood designed plans for our double-story side extension, loft conversion, and single-story rear kitchen extension, and we knew we had to choose the right company since it involved our entire home.

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.
Riley Russell profile pictureRiley Russell
13:58 31 Jan 25
Kirkwood done a fantastic job on our architectural plans for our new single story kitchen extension in Brentwood. They gained us approval from the council and also provided the structural engineering for the project. We used their recommended builder who so far, we cannot fault one bit. Thanks again and highly recommend.
iansalsbury profile pictureiansalsbury
10:54 24 Jan 25
The Kirkwood team were a pleasure to work with and have in our house. What can be a stressful time was made a lot easier by a team who build with quality, communicate clearly, and address and action any questions you raise....however small or large.
We now have an amazing extension, and would be happy to use the team again.
Natalie Moore profile pictureNatalie Moore
12:29 23 Jan 25
Jamie and team are always helpful and very knowledgeable. Work on our kitchen extension carried out professionally and to high standard from design to build completion. A fantastic job, and very pleased. Many thanks
Kelly Pye profile pictureKelly Pye
08:27 22 Jan 25
Jamie has provided lots of advice on house improvements including different options for extending as well as the possibility of a loft conversion. He responds quickly to queries and is full of knowledge! I wouldn’t hesitate to recommend him
Boris profile pictureBoris
19:35 12 Nov 23
Kirkwood Design and Build Builders, Wickford did a fantastic job on our extension in Billericay. They helped with planning permission, design, and build. Professional company through and through. Given that we haven't done such a large project before, we were a bit nervous and had a lot of questions. Jamie and his team from Kirkwood Design and Build Builders was good putting us at ease and now that we are fully complete with all our work, we further appreciate how professional this company is. Would highly recommend.
Holly Luckin profile pictureHolly Luckin
09:29 11 Nov 23
Nothing was to much hassle and Jamie is lovely!
john rocke profile picturejohn rocke
11:33 09 Nov 23
Great company and very professional. Nothing was a problem, very helpful and will definitely use them again. Have already given their details to a friend of mine.
Dave Lynch profile pictureDave Lynch
19:32 08 Nov 23
Work carried out to a very high standard, very pleased with the results.
Sharon Gormer profile pictureSharon Gormer
13:06 07 Nov 23
Very professional company, helpful and friendly staff.
Aaron Tutton profile pictureAaron Tutton
11:15 07 Nov 23
Great builders, very professional and perfectionists! Thank you for such an amazing job
Olly Tait profile pictureOlly Tait
13:28 21 Apr 23
Jamie and his team were so profesional from start to finish and made the job a joy to watch our dream come together.
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!!!
Sandie profile pictureSandie
20:03 20 Jan 23
I highly recommend the Kirkwood team! Exceptional workmanship, clear communication, Jamie & his team have provided the utmost as a polite & professional team! Very satisfied customer, looking forward to planning our loft conversion this year with you guys! Many thanks!

Single story extensions in Canvey Island

Single storey extensions are a great, affordable way to add extra space to your home. They’re usually easy to get permission for and quick to build. Options include rear extensions, side extensions, garage conversions, and wrap-around designs. You can even make your kitchen bigger and add steelwork for that open-plan feel you’ve been after.

How long does it usually take to complete a single-storey house extension?

A typical single-storey extension project takes about three to four months from the initial survey to completion. Although the construction phase generally lasts around three to four weeks, the total timeline depends on factors like size, materials, and planning permission requirements. Before starting work, our design team will provide a clear, tailored schedule based on your project’s needs.

 

Canvey Island architects design single storey extensions to create more space and improve layout

Side, rear & wrap-around extensions in Canvey Island

Single storey wrap-around extensions can completely transform the ground floor of a home. The side part doesn’t need to be wide, steelwork allows builders to remove the existing side wall, combining the rear and side into one open space. Side extensions are also great for keeping your garden intact, and the added width opens up loads of options for your internal layout.

 

How much does a single story extension in Canvey Island cost?

The cost of a single storey extension in Canvey Island depends on a few key factors—size, materials, and any extras you include. Bigger builds and higher-end finishes will naturally increase the price. As a rough guide, costs usually start from around £2,000 per square metre, which covers the main structure but not final finishes or decorating. If you’re planning to include a new kitchen, that would be an extra cost on top. For a more accurate idea, it’s best to get a detailed assessment based on your design and home.

 

Estimated cost of a single storey extension in Canvey Island with guidance from local architects

Rear Extensions: Open Up Your Home

A rear extension is a brilliant way to expand your Canvey Island home by extending out from the back, naturally linking your indoor space to the garden. It helps improve the flow between inside and outside areas, making full use of natural light and open-plan living. As experienced architects working in Canvey Island, we design each extension to meet building regulations while boosting both the practicality and style of your home.

Planning Advice from Experienced Canvey Island Architects

If you’d like a free call with architects in Canvey Island who know the planning process inside and out, get in touch today. Whether you’re planning a loft conversion, a sleek single-storey extension, or trying to choose between a pitched or flat roof, we’ll guide you through every step.

Canvey Island falls under Castle Point Borough Council for planning applications. You can find more about their planning policies, permitted development rules, and how to apply on their official website.

Want to know the pros and cons of pitched and flat roof extensions? Learn more here and see which is right for your home.

Canvey Island rear extension designed to open up the home and connect indoor and outdoor spaces

Loft conversions in Canvey Island

We’ve been designing loft conversions in Canvey Island for years—and while it’s known for seaside views and island charm, it’s also full of homes with untapped potential. If you’re looking for experienced Canvey Island architects, you’re in the right place. We know the local planning rules inside out and have a solid track record of getting loft conversions approved. Whether you’re planning a dormer, hip-to-gable, or Velux conversion, we’ll help you make the most of your space.

Canvey Island loft conversion designed by local architects to add space and value

Planning permission in Canvey Island

Planning permission in Canvey Island can feel like a maze, but that’s where the right guidance makes all the difference. With a clear understanding of Castle Point Borough Council’s requirements, the process becomes far more straightforward. Whether your project falls under permitted development or needs full planning permission, knowing the rules and avoiding delays gives you the best chance of approval.

 

Canvey Island architects offering expert planning guidance

If a free call with Canvey Island architects who know the process inside out sounds helpful, get in touch today. From loft conversions to modern single-storey extensions, the right advice can make all the difference.

 

Castle Point planning permission guidance for Canvey Island home extensions by local architects

Permitted development in Canvey Island – Build without full planning permission

Many home extensions and loft conversions in Canvey Island fall under permitted development, so full planning permission isn’t always required. That said, there are clear rules around size, height, and materials that must be followed. Even if your project qualifies, you’ll still need to submit an application to the council for approval. Our Canvey Island architects can assess your property and guide you on the different types of house extensions available.

Do You Need Planning Permission?

Many extensions and loft conversions in Canvey Island fall under permitted development, but size, height, and material rules still apply. Even if eligible, an application must be submitted. Our architects can assess your project and advise on your best extension options.

Extension Plans in Canvey Island

Permitted development allows some home extensions and loft conversions in Canvey Island without full planning permission, but there are limits. Our architects will check if your project meets the rules and handle the approvals with Castle Point Borough Council.

Lawful Development Certificates

Every extension needs professional plans, even if it falls under permitted development. Detailed architectural drawings are key to meeting building regulations, ensuring structural safety, and satisfying local authority requirements. They also give builders clear guidance and help speed up the approval process when needed.

Home renovation architects in Canvey Island

Renovations often go hand in hand with a house extension or garage conversion. Many builders prefer to carry out both at once, making the process quick and reducing disruption. A smart renovation can completely reshape your home’s layout, maximising space, improving flow, and boosting natural light. Sometimes, an extension isn’t even needed. Reworking internal walls can make a big impact. Our Canvey Island architects specialise in designing renovations that improve how your home works and feels, while adding long-term value.

Canvey Island architects specialising in home renovation design and planning

Pitched Roof vs Flat Roof Extensions

When planning a home extension, deciding between a pitched roof or flat roof is a key choice. Both options add space, boost energy efficiency, and enhance your home’s look. The best fit depends on your budget, style preferences, and maintenance needs. For more insight, check out our Pitched Roof vs Flat Roof Extension Guide.

Comparison of pitched and flat roof extensions by Canvey Island architects

Canvey Island Architects for Kitchen Extensions

A well-designed kitchen extension can completely change the feel of a home. It’s not just about extra space, it’s about improving how the kitchen works and flows. With the right layout, a small, closed-off kitchen can become a bright, open-plan space for cooking, dining, and socialising. Rear, side, or wraparound extensions can open up the back of your home, connecting the kitchen to living areas and creating a more welcoming, cohesive space.

Design the perfect kitchen extension for your home

A kitchen extension should work for both your space and your daily routine. It’s not just about adding size, clever design touches like reworking walls, improving layout, or adding skylights can make a big difference. Maximising natural light and flow helps create a kitchen that feels open, practical, and enjoyable to use. Every design is tailored to suit the existing home and meet building regulations, delivering a result that’s both functional and stylish.

 

Kitchen extension design by Canvey Island architects with open-plan layout and natural light

Garage Conversions in Canvey Island – Unlock Hidden Space

Garages often end up as storage spaces rather than being used for parking, especially as modern cars outgrow their original design. Many homeowners in Canvey Island are now turning unused garages into valuable living space. A well-planned garage conversion can add a home office, utility room, or extra lounge, improving the layout and adding value. Our Canvey Island architects make sure the design fits naturally with your existing home and meets all the necessary building regulations.

Do You Need Planning Permission for a Garage Conversion?

Most garage conversions in Canvey Island don’t need planning permission, but some homes may have restrictions. If the garage was part of a new-build condition or the property is in a conservation area, approval might be required. Our team will assess your property and handle any necessary applications with Castle Point Borough Council to keep things running smoothly.

Designing a Garage Conversion That Works for You

A well-designed garage conversion in Canvey Island should feel like a natural part of the home, not an afterthought. Whether you're creating a home office, playroom, or extra bedroom, the layout is planned to make the most of the space, maximise natural light, and ensure it flows well with the rest of the house.

Building Regulations and Structural Considerations

Even if planning permission isn’t needed, garage conversions in Canvey Island must still meet building regulations. From insulation and ventilation to structural safety and fire protection, everything must be up to standard. Structural engineering checks make sure foundations, load-bearing walls, and any reinforcements are properly in place for a safe, long-lasting conversion.

Ready to Start Your Home Extension in Canvey Island?

If you’re planning a home extension in Canvey Island, Kirkwood’s here to help. Our experienced team of Essex architects provides guidance through every stage, from architectural design to securing planning permission with Castle Point Borough Council. Whether it’s a loft conversion, garage conversion, or kitchen extension, designs are created to maximise space, comply with building regulations, and enhance the home.

Get in touch by emailing info@kirkwoodbuild.co.uk or phoning 01268 944233 to schedule a free consultation. Let’s turn your ideas into a well-designed, approved, and beautifully planned extension.

Canvey Island | Architectural Design & Planning

Serving Canvey Island & surrounding areas

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