How it works
Arden provides professionally design extension packages that simplify the journey from concept to construction.
Developed within Permitted Development guidelines, each Arden package includes coordinated drawings, technical details, specifications, and structural information – everything need to confidently plan, price and build a beautifully designed rear extension.
"The space felt beautifully considered; but what we valued most was the clarity and confidence the package gave us throughout the process."
Why it exists
Many homeowners face confusing processes, long delays, and hidden costs when extending their homes.
Yet nearly half of all UK house extensions can be built under Permitted Development (PD), avoiding the need for a full planning application.
Arden was created to simplify that journey - giving homeowners professionally designed extension packages that make it easier to plan, price and build a beautiful rear extension.
Why choose Arden
Created to make high-quality architecture more accessible, removing much of the uncertainty, delay and complexity traditionally associated with extending a home.
Designed to suit a wide range of UK homes - from terraced and semi-detached houses to detached properties, and each Arden package can be adapted to fit your space.
Delivered as both an instant digital download and a premium printed pack, giving you everything your builder needs, everything building control expects, and everything you need to begin with confidence.
Find your perfect fit
"With Arden covering all the design costs, I saved significantly on both time and money, avoiding the usual back-and-forth of quotes and coordination."