Many Dorset homeowners can extend without full planning permission. Learn how permitted development works — and why a Lawful Development Certificate is worth it.

What makes the best architect in Dorset? At Rosenkelly Architectural Design, we combine local knowledge, honest service, and planning expertise to help Dorset clients bring their projects to life — from new builds to home improvements.

At Rosenkelly Architectural Design, we stay involved from design through to delivery. Here's a glimpse of a recent site visit for a large two-storey extension in Dorset, showing real progress and our commitment to seeing projects through on the ground—not just on paper. Progress photo of Large extension in Weymouth, Dorset.