Essex Home Extension Services

Fixed fee home extensions in Essex

Are you looking to expand your living space? We make house extensions simple, easy, and stress-free. With years of experience, we've helped hundreds of happy clients transform their homes with beautiful, functional extensions, delivered on time and on budget.

We offer full support throughout the process, from initial concept to final inspection. Our services include comprehensive building regulation plans, precise cost estimates, and material specifications. Our fixed fee pricing model and cost-saving strategies help you stay on budget without compromising quality.

Get in touch today for your free quote and start the journey towards your dream home.

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Your local architects – committed to excellence

No costly surprises
We offer a fixed fee guarantee, ensuring you pay fixed fees across the project with no unexpected costs. You can rely on us to stick to the prices we initially quote.

Unlimited designs
We're proud to offer unlimited design iterations. We'll keep producing house extension plans until you're completely satisfied with the result.

Dedicated point of contact
Get your own personal project manager for your house extension. They'll serve as your point of contact, providing regular updates and answering any questions you have.

Our customer testimonials

"Excellent team and very helpful. Design spec answered all our questions very promptly even when we asked for things to be changed/amended it was completed really quickly. The fixed price included unlimited alterations to get the final result and exactly what we wanted. They guided us through all the different stages and explained the process very clearly. We can’t recommend Design Spec enough. Thank you to Dan and the team at Design Spec."

"Design Spec Ltd are fantastic. They have helped us through the design and planning of our bungalow renovation and extension and we could not be more grateful. They are quick at responding, patient and very professional. We would recommend this company to everyone going through this process!"

"We are completely inexperienced and had no idea where to start with getting our double storey extension plans off the ground. So grateful we found Design Spec. Wonderful team to work with; friendly, helpful, and very knowledgeable. Quick to acknowledge every query and provided pragmatic and honest advice. We had a huge delay getting our planning permission result from the council and am so grateful to Dan for incessantly chasing a response - completely took the stress and pressure from us (which was a huge relief as we have a newborn baby and couldn't have coped ourselves) and the plans passed first time. Excellent service and we are now moving forward with them for our building control approval. Looking forward to working with them again on the next stage of our project."

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Start your house extension journey today

Whether you're planning a modern kitchen extension in Brentwood or a spacious living room addition in Chelmsford, our team of experts is at your service, turning your extension ideas into reality with robust extension planning, and no surprise costs.

Home Extensions
If you want some extra living space but don't want the hassle of moving house, an extension is a more affordable alternative.

Loft Conversions
Add significant value to your property by transforming part of your home into a brand-new living space when converting your loft.

Renovation
Let us transform your house into the home of your dreams. Our residential architects can help bring your vision to life.

House extension planning in Essex

Fixed fee home extensions in Essex

Your local architects – committed to excellence

Our customer testimonials

Start your house extension journey today

Frequently Asked Questions

Take a look at our latest projects

Get your fixed fee quote today