Certificate of Lawfulness in Weymouth — Permitted Development Proof
A legal document confirming your extension falls within Permitted Development rights. Protects you at resale — mortgage lenders and solicitors expect it.
What's included
- Existing and proposed floor plans
- Elevation drawings
- Site plan and block plan
- PD compliance assessment
- Council application and liaison
Certificate of Lawfulness in Weymouth
A Certificate of Lawfulness (CLPUD) is a legal document confirming your extension falls within Permitted Development rights. It is not planning permission — it is proof that you don't need it. In Weymouth, where Georgian seafront terraces along the Esplanade, Victorian properties in Westham, post-war housing in Littlemoor, and modern developments in Preston and Chickerell, this certificate protects you when you come to sell.
Why you need one
Mortgage lenders, solicitors, and buyers expect documentary proof that extensions were built legally. Without a certificate, a future buyer's solicitor may raise enquiries that delay or derail your sale. The £1,500 investment now can save months of stress later.
PD rules in Weymouth
Dorset Council covers a large rural area with many villages in conservation areas and AONBs (Dorset AONB, Cranborne Chase AONB). Permitted Development rights may be restricted in these areas — always check before assuming PD applies. Weymouth's seafront conservation area has strict controls. Coastal properties may need specific materials that resist salt air corrosion We assess your property against all PD conditions before applying — if your project doesn't qualify, we tell you upfront and recommend the planning application route instead.
What we submit
Existing and proposed floor plans, elevation drawings, a site plan, and a compliance statement demonstrating how the proposal meets every PD condition. We submit to Dorset Council and manage the process through to the certificate being issued.
Typical properties in Weymouth

Royal Terrace, Weymouth — Regency terrace dating from 1816 on the seafront esplanade
Fig. 2

Frederick Place, Weymouth — Georgian terrace originally laid out on the gardens of Gloucester Lodge
Fig. 3
Lawfulness Cert questions in Weymouth
Lawfulness Cert in other areas
Other services in Weymouth
3D Laser Survey
£650
A 1.5-hour on-site visit with a 3D laser scanner to capture millimetre-accurate measurements of your property. The foundation for precise structural calculations and planning drawings.
Structural Calculations
£350
Engineer-certified structural calculations for your extension or wall removal. Covers beam sizing, foundation design, and Building Regulations compliance.
Planning Application
£2,200
Full householder planning application preparation and submission. We handle the drawings, design and access statement, and council liaison from start to finish.
Building Regulations Drawings
£399
Technical construction detail drawings that satisfy Building Regulations. Covers insulation, drainage, structural details, and everything your builder and building control need.
Builder Introduction
£149
We match you with 2–3 vetted local builders who specialise in your type of project. Includes a professional brief so every builder quotes on the same scope.
Build Coach
from £49/mo
Ongoing expert support throughout your build. From fortnightly AI check-ins to weekly human coaching calls, builder mediation, and trade price verification.
Ready to get started in Weymouth?
Certificate of Lawfulness from £1,500. Fixed price, no obligation.
Every plan drawn by qualified drafters in Poole, Dorset
Serving homeowners across Poole, Bournemouth, Christchurch, Wimborne, Wareham, and the wider Dorset area.
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