Home extension design, from first idea to planning approval.
Friendly, professional planning and drawing services for home extensions, loft conversions and alterations. Clear advice, thoughtful design and a straightforward process from your first conversation to submitted drawings.
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Planning and design, handled with care.
Robert Blake Designs helps homeowners turn ideas into practical, well-considered proposals. You deal directly with Will, with clear communication throughout and support with the planning process and building regulations drawings.
Everything your project needs, from sketch to approval.
Planning applications
Householder applications, prior approval and lawful development certificates, prepared and submitted on your behalf.
Planning drawings
Existing and proposed plans, elevations and sections to explain your project clearly.
Building regulations
Detailed drawings and specifications to support your building control application.
Property extensions
Single-storey, two-storey, rear, side and front extension design tailored to your home.
Loft conversions
Practical layouts and planning drawing support for creating more space at home.
Garage & outbuildings
Design and planning support for garages, garden buildings and ancillary accommodation.
One point of contact. A personal service.
With over 15 years' experience, Robert Blake Designs provides a responsive, straightforward service built around your project. We take time to understand what you want to achieve, explain the options and prepare drawings that communicate the proposal clearly.
Please note: Robert Blake Designs does not provide structural engineering or structural design services. This includes structural calculations, beam and lintel design, steelwork design and foundation design. Where structural input is required, it must be commissioned separately from a suitably qualified structural engineer.
More about our experience
Projects from our drawing board.
A selection of residential design imagery to give a feel for the types of projects we help homeowners plan.



Planning drawing services across Harlow and Essex.
We work with homeowners in Harlow, Chelmsford, Epping, Bishop’s Stortford and Sawbridgeworth. Find out more about our residential planning drawing services in your area:
Harlow · Chelmsford · Epping · Bishop’s Stortford · Sawbridgeworth
From first conversation to a clear set of drawings.
Discuss
We talk through your ideas, requirements and the best route forward.
Survey
We arrange a measured survey and prepare the existing drawings.
Design
We develop the proposal and refine the drawings with you.
Submit
Where instructed, we prepare and submit the relevant planning application.
Clear answers before you start building.
Explore practical guides to planning permission, permitted development, Lawful Development Certificates, prior approval, loft conversions and building regulations.
Explore our planning advice →Good ideas start with a conversation.
Tell us about your extension, loft conversion or renovation. We will be happy to discuss your ideas, explain the planning considerations and provide a no-obligation quotation.
Request a quoteEmail Will