extension plans

High Quality Architectural & Planning Services for Homeowners

The Residential Design & Planning Specialists

House extension plans are the most popular service requested by clients looking to transform their homes by creating additional space.

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If you are looking to extend your home then why not let us take the worry and stress of ensuring your extension has the necessary planning and building regulations permissions.

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We offer extremely competitive fixed fee architectural services for all manner of domestic extensions so it doesn’t matter if your looking at adding a small kitchen extension or a vast two storey wrap around extension, we will be able to provide all the necessary design and planning services on a low cost fixed fee basis.

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By far the most popular type of extension at present is the single storey rear addition which would generally fall within the permitted development guidelines.  We have therefore decided to include the costs of our fixed fee services for this type of extension on this page.

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With a wealth of experience creating detailed drawings for customers, we ensure that all of our plans are planning and building regulation compliant to make the process as simple and hassle-free for you as possible.

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We also handle all of the paperwork side of things for you, as well as providing agency services acting as a buffer between yourselves and your local authority planning and building control departments.

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Please take a look at our previous works page to give you an idea as to the detail and quality of our work – not all plans are created equal and ours are among the best available, we know this by the number of trade clients who have continually used our service over the years.

Architect fees for extensions

ONLY £450.00 INCLUSIVE (FIXED FEE SERVICE)

ONLY £745.00 INCLUSIVE (FIXED FEE SERVICE)


Would You Like To Find Out More About This Great Offer?

If you are interested in our fixed fee service at our offer prices above (£450.00 for planning drawings or £745 for planning & regs combined) then please complete the contact form below and a member of our team will contact you within 24 hours.

Alternatively you can call us on 01375 267 888 – our office hours are 9am to 5pm (Mon-Fri).


We Provide a Comprehensive Service, From Conception All The Way Through to Approval…

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  • Full measured and photographic survey of your property by one of our experienced and knowledgeable survey teams
  • Complete set of building regulations drawings produced by an experienced architectural technician who has produced plans for hundreds of home extensions all across all Essex, London & Home Counties.
  • Drawings will include a full detailed specification for Building Regulations.  This will also allow contractors to provide you with a very accurate quotation for the build.
  • Preparation of Paperwork and Submission of your plans to your Local Planning Authority.  We will submit copies of your plans to both Planning & Building Control Departments and thereafter we will act as your agent and deal with any enquiries that may arise from planning and building control on your behalf.
  • Ordnance survey maps included
  • Unlimited free amendments to the plans until such time as approval is obtained/decision notice by your Local Authority.
  • Paper copies of your approved drawings in Full Architectural A1 size,
  • We can also help you find a suitable contractor for the build phase.

We can provide you with 2D plans as well as state of the art 3D rendered images of completed designs, providing an accurate visualisation of what the final result will look like.

KJM are able to offer both traditional brick and block work construction, timber framed construction as well as incorporating modern and ecological building technologies into your designs. Our friendly, attentive team want to give you the home extension that you want, and will discuss all of your needs and wishes in detail with you.

Why Choose KJM Designs to provide architectural support

We have a wealth of experience producing planning and building regulations plans for clientslooking to extend their homes. Click the button below to view some case studies of houseextension plans produced on behalf of our clients.

At KJM Design and Planning we want to make sure that you are confident in our abilities to provide you with the service your project deserves.  Our friendly team are on hand at all times to answer queries and offer guidance regarding your house extension and our experts are happy to advise you on any permissions which could be required.

KJM Design are a progressive one stop shop for residential architectural services who offer you a complete service to realise your home extension dreams by utilising our quality assured expertly produced house extension plans.

Our Risk Free No Quibble Guarantee

Our Quotations are guaranteed to include UNLIMITED revisions for any alterations as required by your local authority until such time as your plans are approved. There are no extra costs GUARANTEED. You can budget your costs sure in the knowledge that there are no extra architect bills further down the line.