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Chelmsford's #1
architectural design firm

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5-star Google reviews

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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.

The brains behind the bricks

Kirkwood is a family-run company with expert knowledge in house extensions and loft conversions. As trusted Chelmsford architects, we guide you on build costs upfront, connect you with top-quality builders, and deliver high-quality designs at an affordable price. Find out how much a house extension costs. Our unique approach keeps costs down without cutting corners, offering a fast, efficient, and transparent service for a stress-free extension. Need help choosing a trustworthy builder? Read our guide.

  • Avoid costly build errors
  • Prevent council disputes
  • Access reliable builders
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What homeowners are saying

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Kirkwood - The Extension Planning Company
5.0
Based on 60 reviews
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Jack Dev
08:58 04 Mar 25
I was looking for an architect in Billericay and came across Kirkwood. They designed my single-story rear extension, which includes an open-plan kitchen and an internal knock-through. The architects and structural engineers were fantastic and really understood what I wanted to achieve. Kirkwood also put me in touch with local builders who were reasonably priced and completed the extension without any fuss. If you’re looking for a reliable Essex architect serving Billericay, I’d definitely recommend Kirkwood.
Maria Krystal Humphrey
11:20 03 Feb 25
We had a single-story house extension built in Thurrock, Essex, by the builders that Kirkwood passed us onto. Kirkwood's architects did a really good job, so we were pleased we went to them rather than a design-and-build company that just subcontracts the architectural work out.
Grace Biddiss
09:27 02 Feb 25
We appointed Kirkwood as our architects for a double story and wrap around kitchen extension in Billericay, Essex. They provided us with architectural plans, structural engineering and building regulation drawings. The team was professional from start to finish and the builder they recommended has done a faultless job. You definitely get what you pay for, highly recommend. Thanks!
Freyja
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.
Harry
14:41 01 Feb 25
I was skeptical about Kirkwood’s 5 star reviews but now I’m one of them. Incredible service, especially for the money we paid. They wasn’t the most expensive but for the standard of service we received, they defiantly should have been. They done the architectural plans for our home extension in Chelmsford. The architect was amazing at creating our open plan kitchen and dining area. The structural engineer was quick, polite and drunk tea like it was going out of fashion. Strongly recommend if your considering a architect for your home extension in a Chelmsford.
Riley 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
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
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
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
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
09:29 11 Nov 23
Nothing was to much hassle and Jamie is lovely!
john 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
19:32 08 Nov 23
Work carried out to a very high standard, very pleased with the results.
Sharon Gormer
13:06 07 Nov 23
Very professional company, helpful and friendly staff.
Aaron Tutton
11:15 07 Nov 23
Great builders, very professional and perfectionists! Thank you for such an amazing job
Olly 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
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!
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Key design elements for home extensions in Chelmsford

When planning a home extension in Chelmsford, several important factors come into play. Our architects focus on the following design elements:

Light and ventilation

Natural light and proper ventilation are essential in any home extension. Our Chelmsford architects incorporate windows, skylights, and ventilation systems to create a bright, airy living space.

Design & layout

Our Chelmsford architectural design team ensures that every inch of your extension is used wisely. Whether you’re working with a small or large space, we’ll create a layout that maximizes the potential of your home.

Materials for the job

The materials you choose will greatly impact the look and budget of your extension. Our architects in Chelmsford will work closely with you to choose materials that complement your home while staying within your budget.

Architectural design in Chelmsford

We’ve been designing home extensions in Chelmsford, the birthplace of radio, for years. If you’re looking for experienced Chelmsford architects, you’re in the right place. We know the local council well and have a strong track record of securing planning permission in Chelmsford for single-story extensions, loft conversions, double-story extensions, garage conversions, and garden rooms. For more details, see our Pitched Roof vs Flat Roof Extension Guide.

Chelmsford architects

Our Chelmsford architectural design service offers great value for money without compromising on quality. We provide free initial advice and make sure you understand the real cost of building before committing to design fees. It’s our way of being transparent and showing that we’re here to help, not just to make a sale.

If you’d like a free call with our Chelmsford architects to discuss your plans, get in touch today. We can help with any type of house extension from loft conversions to contemporary single story extensions.

Single story extension in Chelmsford, designed by expert Essex architects to enhance space and functionality.
Contemporary kitchen extension in Chelmsford, designed by Essex architects to create a spacious and light-filled home.

Benefits of a well-planned architectural design in Chelmsford

A well executed architectural design offers several benefits for homeowners in Chelmsford. Here is why working with Chelmsford architects is important for your next home extension:

Increase value

A well designed home extension can increase your property value by up to 20%. This is a great return on investment. You may be planning to stay long term or sell your home in the future. With Kirkwood’s expertise in Chelmsford home extension design we ensure that your project is completed to the highest architectural standards.

Improved living space

One of the main reasons homeowners in Chelmsford opt for architectural design services is to make better use of their space. If you are extending your kitchen or adding a new living area our architects will work with you to create a design that maximizes both practicality and style.

Linking the design

At Kirkwood we understand the importance of making your new extension blend with the existing structure. Our architectural designs in Chelmsford ensure that your extension matches your home’s style and materials resulting in a polished unified look.

Ready to Start Your Home Extension in Chelmsford? Contact Kirkwood Today!

If you’re ready to start planning your home extension in Chelmsford, Kirkwood is here to help. Our team of experts will guide you through every stage of the process, from initial designs to securing planning permission in Chelmsford. With our extensive experience and dedication to quality, you can trust Kirkwood to deliver a design that meets your needs and exceeds expectations.

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 Chelmsford!
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