Online Architectural Services

Certificate of Lawfulness

Certificate of Lawfulness London: Drawings and Submission Support

We prepare drawings and supporting evidence for Lawful Development Certificate applications to your Local Planning Authority (LPA), for proposed works (CLOPUD) and existing works (CLEUD).

Rear elevation of a brick London terraced house with a modern single-storey extension and sliding glass doors, built under a certificate of lawfulness London, opening onto a paved patio and garden

What is a Certificate of Lawfulness?

A Certificate of Lawfulness, also called a Lawful Development Certificate (LDC), is a formal decision from your LPA. It confirms whether proposed or existing development is lawful on the facts at the date you apply. It is not planning permission, and it is not a judgement on design merit.

You might want one before starting a loft conversion or rear extension under permitted development, or to document works already in place. Buyers, solicitors and mortgage lenders often ask for formal evidence that works were lawful. A certificate is not always legally required.

We prepare the application drawings, a supporting statement and an assessment of the permitted development rights that apply to your property. The LPA makes the decision. Where Article 4 directions, conservation areas or flats are involved, we flag the likely constraints at the start.

A Certificate of Lawfulness acts as your shield against future planning enforcement action. Think of it as an insurance policy for your property development – once obtained, it provides formal confirmation from your local authority that your works are completely lawful. This isn’t just paperwork; it’s your guarantee that solicitors, mortgage lenders, and future buyers will have complete confidence in your property.

My streamlined online service combines technical expertise with deep planning law knowledge. You’ll receive professionally prepared drawings, comprehensive supporting statements, and expert assessment of your permitted development rights. This means no more sleepless nights wondering if your extension complies with regulations, no more delays during property sales, and no more expensive surprises from planning enforcement officers.

Your time is valuable, and unnecessary planning applications can cost thousands. My service ensures you take the right path from the start, maximising your chances of approval while protecting your investment for years to come.

Types Of Certificate of lawfulness

Proposed Development (CLOPUD)

(CLOPUD)

Applying before you build. A CLOPUD asks the LPA to confirm that a planned extension, loft conversion or outbuilding falls within permitted development. We prepare the existing and proposed drawings and the supporting statement it needs.

Existing Development (CLEUD)

(CLEUD)

Applying for works or uses already in place. A CLEUD asks the LPA to confirm that existing works or a use are lawful, usually because enough time has passed. The time limit depends on when the work was completed and what it is. The rules in England changed in April 2024.  We help you assemble the evidence, such as dated photographs, records and statements.

When You Need a Certificate of Lawfulness

Our Certificate of Lawfulness Process

1

1. Property and Lawfulness Assessment

We review your property and the proposed or existing works against the relevant permitted development rules or evidence requirements.

2

2. Drawings and Evidence Preparation:

  1. We prepare the drawings and help gather the supporting evidence for submission.
3

3. Council Submission and Liaison:

We submit your application to the LPA and respond to queries about the drawings and documents we prepared.

4

4. LPA Decision:

The LPA decides the application. If it is satisfied, it issues the certificate

Why Choose Online Architectural Services

Our London team prepares Certificate of Lawfulness submissions for homeowners, buyers and landlords.

London Planning Knowledge

We prepare submissions for London LPAs and check each property for local constraints, such as conservation areas and Article 4 directions, before drawing starts.

Project Experience

We prepared a Certificate of Lawfulness (Proposed) application for a single-storey rear extension, submitted to Thurrock Council in April 2024 (ref. 24/00174/CLOPUD). View the public record.

Council-Ready Drawings

We prepare drawings for submission to your LPA, produced to its validation requirements.

Clear Pricing

From £245 for a measured site survey, from £295 for planning drawings and from £300 for the Certificate of Lawfulness application submission. Council application fees and structural engineering are billed separately

Natural wide-angle photograph of a quiet Georgian street in London with historic brick terraced houses featuring sash windows, arched doorways, and wrought-iron railings in soft, early morning light, devoid of people and vehicles.

Related Services

Building Regulation Drawings

Technical drawings for Building Control submission.

Structural Calculations

Calculations prepared for your project by a structural engineer.

Party Wall Services

Party wall notices and surveys.

Land Registry Compliant Plans

Plans prepared to Land Registry requirements.

Frequently Asked Questions

It is not always a legal requirement, but it is often useful when you are carrying out works under permitted development, documenting existing works, changing the use of a property, or selling, buying or remortgaging.

No. Planning permission grants consent for development. A certificate confirms that, on the facts submitted, consent is not required.

Proposed (CLOPUD) is for works or use not yet started. Existing (CLEUD) is for works or use already carried out.

LPAs typically aim to decide within 8 weeks of a valid application. Council workload, complexity and any requests for information can change this.