PERMITTED DEVELOPMENT & CERTIFICATE OF LAWFULNESS

Lawful Development Certificate Drawings in London

If your extension, loft conversion or other home project is intended to fall within permitted development, WEDRAWPLANS can prepare the existing and proposed drawings needed to present the scheme clearly to the council and support a Lawful Development Certificate application.

• Existing and proposed floor plans
• Existing and proposed elevations
• Roof plans and sections where relevant
• Key dimensions needed to explain the proposal
• Extension, loft and roof alteration drawing packages
• Every London borough covered

Call 020 3654 8508 WhatsApp

Permitted development / LDC quote

Send the postcode and a short description. We will confirm the drawing scope and the likely application route.

Home projects commonly considered under permitted development

Whether permitted development rights apply depends on the property, the proposal, previous alterations and local restrictions. We do not assume a project qualifies: the address and design need to be checked before the route is relied upon.

Rear extensions

Single-storey rear additions can sometimes fall within permitted development limits, subject to the detailed rules and the property's planning history.

Loft conversions and dormers

Many houses can use permitted development rights for certain roof extensions, but volume, position, height, materials and other limitations matter.

Hip-to-gable roof alterations

Some side roof alterations may be possible under permitted development, depending on the house and how the proposal meets the relevant limitations.

Rooflights

Roof windows may be permitted development where the relevant projection, position and other requirements are satisfied.

Outbuildings

Garden buildings can sometimes be permitted development where their use, position, height and site coverage comply with the applicable limits.

Existing work and lawfulness

For completed work, a different evidence-based lawful development route may apply. The required drawings and evidence depend on the circumstances.

What the drawings need to demonstrate

The existing property

Accurate existing plans and elevations establish the house before the work and help the council understand the baseline.

The proposed dimensions

Key depths, heights, roof changes and other dimensions should be clear enough for the council to compare the proposal with the relevant planning rules.

The relationship to the original house

Permitted development rules often depend on the original dwelling and previous additions, so the drawing set needs to communicate that relationship clearly.

The correct planning route

If permitted development is not the right route, we can instead prepare planning drawings for a householder or other planning application where appropriate.

Related drawing services

Garden Room & Outbuilding Plans Solar Panel Planning Drawings Planning Drawings Extension Plans Loft Conversion Plans Building Regulation Drawings

Permitted development and Lawful Development Certificate drawings across London

WEDRAWPLANS supports homeowners across every London borough, plus selected surrounding M25 areas. Choose your area for local planning, extension, loft and Building Regulations guidance.

Hertfordshire Essex Surrey borders and M25

Lawful Development Certificate FAQ

What is a Lawful Development Certificate?

A Lawful Development Certificate is a formal decision from the local planning authority confirming whether a proposed or existing use or development is lawful for planning purposes. It is commonly used where homeowners want formal confirmation that work falls within permitted development rights.

Do I need drawings for a Lawful Development Certificate?

Clear drawings are normally important because the council needs enough information to assess dimensions, roof form, location and the relationship between the existing property and the proposed works. The exact information depends on the project.

Can WEDRAWPLANS prepare permitted development drawings for extensions and loft conversions?

Yes. We prepare existing and proposed drawings for rear extensions, loft conversions, roof alterations and other homeowner projects where permitted development rights may apply.

Does a Lawful Development Certificate replace Building Regulations approval?

No. Planning law and Building Regulations are separate systems. A project can be lawful in planning terms and still require Building Regulations approval and technical drawings before construction.

Do you cover every London borough for Lawful Development Certificate drawings?

Yes. WEDRAWPLANS covers every London borough and selected surrounding M25 locations for permitted development and Lawful Development Certificate drawing packages.

WEDRAWPLANS project experience

Examples of lawfulness certificates for existing uses and proposed development

Compare Greenwich certification of an established ten-flat residential use under section 191 with certificates for proposed ancillary garden buildings and roof works under section 192. Each application depends on its facts, documentation and the applicable law.

Browse all projects →

Certificate of Lawfulness (existing use) granted