House Extensions
Design your house extension with confidence
Imagine a brighter, more spacious home perfectly suited to your family’s life, with seamless open-plan living, extra bedrooms and bathrooms, or a dream kitchen – without the expected planning stress or surprises. Our team at Ecclesall Design specialises in house extensions across Yorkshire, Derbyshire, and beyond, delivering stunning results with our unbeatable 100% success rate in securing planning permission for residential extensions.
Backed by strong relationships with local planning authorities, building control, engineers and builders, we guide you every step. A well-designed house extension not only enhances daily living but also typically adds considerably to your property value (often far exceeding the costs in high-demand areas), delivering an excellent return on investment.
Our transparent fixed-fee Service Proposal covers everything: detailed surveys, bespoke designs (choose cost-effective 2D drawings or immersive 3D modelling to visualise options), including unlimited revisions until you’re 100% happy, planning applications (including pre-application advice and Lawful Development Certificates), building regulations approval, and helpful availability and advice through to completion. You can start early, even before completing a potential property purchase, to fast-track your house extension process.
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Our proven house extension design and approval process
We begin with a thorough on-site survey and an initial consultation to capture measurements, photos, and your lifestyle needs, including how you use current spaces. We discuss your future wishes and style preferences, including what you love and what you want to avoid.
Next, we present inspiring options at a relaxed presentation meeting, combining your ideas with our creative alternatives, complete with printed drawings and photos of products and concepts to illustrate specific points. We discuss pros/cons, materials, natural light, and value-adding features to ensure that you’re proud of the final result.
Post-meeting, we refine your design with no extra charges for amendments, consult with planning/building control as needed, and coordinate with your structural engineer and energy assessor if required. Once your approval is obtained, you and your builder will be given the full set of drawings and building regulations details, ensuring full compliance with current regulations. We include sections, specifications, and any required energy/glazing calculations.
House extension planning permission to finish build
With planning permission or a Lawful Development Certificate in hand (typically within the 8-week statutory period), we deliver precise technical drawings and specs for building control approval. These cover fire safety, damp proofing, drainage, structural standards, and energy efficiency standards. We partner with Sheffield Building Control for streamlined checks and can recommend trusted professionals, including structural engineers and surveyors.
Our support continues post-planning too, handling queries, tweaks, and assisting with the commencement and completion certification. This is so the build stays smooth, on-time, and stress-free.
Browse our 3D design brochure
See our 3D portfolio brochure for project examples, ideas and insights into our architectural design
Why homeowners choose Ecclesall Design for house extensions
Our experienced team crafts practical, innovative extensions that maximise space, light, and value while navigating planning rules and regulations. Ecclesall Design clients praise our full project lifecycle commitment (survey to finished build), transparency (clear, up front quotes with no hidden revision fees), and genuine care throughout your project.
You can join hundreds of happy homeowners who’ve transformed their properties with Ecclesall Design. See our inspiring portfolio of house extensions, lofts, garages, and basement conversions, plus our 5-star reviews on Houzz (including recent Best of Houzz wins), Google, Yell, and more. You will see how homeowners have praised our professionalism, aftercare support, and stress-free architectural project experience.
If you are ready to turn your vision into reality, then contact us today for a no-obligation initial chat, personal service proposal, and survey discussion. We can create the home that you’ve always wanted.
