Garden rooms and Annexe design
Bespoke garden rooms and annexes designed for homes across Essex.
Garden Rooms
Annexe Design
A garden room is a great way to add flexible space without extending your main home. Whether you’re looking for a home office, studio, gym, or a peaceful place to relax, we design garden rooms that feel comfortable, stylish, and connected to your outdoor space.
An annexe is an extension to your home that gives the occupant independence and separation, yet still feels connected to main home. This can be as an out building or via an extension to the home itself.
Planning Made Simple
Detailed Design
Depending on the size and use of the building, planning permission may be required. We guide you through the process, preparing the necessary drawings and working with local planning authorities to help move your project forward smoothly.
Once the design is agreed, we prepare clear technical drawings ready for construction. These give builders the information they need to price and build your garden room or annexe accurately and in line with building regulations.
What Our Customers Think
"CET designed our side / garage extension, was very helpful on site and clearly has an eye for working within site constraints and foreseeing potential issues."
Joe Palmer
"CET have helped us with 2 projects now and have been excellent both times... I will use CET again and would recommend them to anyone."
Lee Gurton
"We had a great experience using CET... Would 100% recommend."
Daniel Gracie
"Can't recommend CET Architectural Designs enough! Charlotte is very professional and very helpful, the best! I'm a very happy customer."
Gladis Woods