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Free 2026 London Planning ReportLawful Development Certificate Drawings in Feltham TW13

Single-storey rear extension on a 1930s semi in Feltham TW13, planning drawings for London Borough of Hounslow approval
Feltham · TW13 · Hounslow

Lawful Development Certificate Drawings in Feltham TW13

Fixed-fee, MCIAT-chartered lawful development certificate drawings for Feltham (TW13) homeowners — London Borough of Hounslow validation and local constraints handled from the start.

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Feltham is an outer-west Hounslow suburb built largely between the wars and in the post-war decades, so the bulk of our work here is family-driven: single-storey rear extensions, side-return infills and loft conversions on 1930s semis and estate housing. Wide plots on roads such as Southern Avenue and Ashmead Road usually leave comfortable room to extend under permitted development while keeping the front elevation intact.

Where a plot sits near the St Dunstan's or Hanworth Park conservation areas, or on the lower ground close to the River Crane, we design to Hounslow Council's expectations from the outset — matching brick and roof lines, respecting the depth and height limits, and building in flood-resilient drainage detail so the application clears validation without an avoidable refusal.

Single-storey rear extension on a 1930s semi in Feltham TW13, planning drawings for London Borough of Hounslow approval
Isometric illustration of a Feltham TW13 home lawful development certificate drawings design
Proposed floor plan
Feltham TW13

Planning in Feltham (TW13): what to know before you apply

There is no published householder Article 4 direction in Feltham, so most rear and loft projects proceed under permitted development. Watch the St Dunstan's, Hanworth Park and Feltham Town Centre conservation areas, and the flood constraint on plots near the River Crane, where PD rights and extension depths are more tightly read.

Typical Feltham housing stock

Feltham is dominated by 1930s bay-fronted semis and post-war council-built estates, with generous rear gardens on roads like Southern Avenue and Glebelands Road. Plots are wide enough for single-storey rear extensions, side infills and hip-to-gable loft conversions without needing to touch the front elevation.

Streets we regularly draw for in Feltham

Southern Avenue · Glebelands Road · Ashmead Road · Browells Lane

Lawful Development Certificate Drawings for Feltham (TW13) homes: the package and the process

Every lawful development certificate drawings we prepare for an Feltham property is drawn to London Borough of Hounslow’s validation standards and tuned to the TW13 constraints above. Here is what the drawing package covers and how the process runs from first survey to approval.

A Lawful Development Certificate (LDC) is a legal document from your local planning authority confirming that building work, or a use of land, is lawful and does not need planning permission. It is not planning permission itself — it is proof that permission was never required, which matters when a mortgage lender, a solicitor or a future buyer asks for evidence that an extension, loft conversion or outbuilding was built within your permitted development rights. DrawingsDirect prepares the drawings and supporting evidence a London borough needs to issue a certificate, checking first whether your project genuinely qualifies.

There are two certificate routes — one for work you are about to carry out (a proposed LDC) and one for work or a use that already exists (an existing or established-use LDC). Both are assessed against the same permitted development rules that apply to a full planning application, but the process is narrower, usually faster and typically cheaper, because the council is confirming a legal fact rather than exercising planning judgement. We assess your property, extension or use before recommending this route, so you are never sold a certificate application that will not succeed.

What is a Lawful Development Certificate?

A Lawful Development Certificate is issued under the Town and Country Planning Act and confirms, in writing, that a building project or a use of land is lawful and would not have required planning permission — or, for existing situations, that enough time has passed that the council can no longer take enforcement action. It carries the same legal weight as a planning permission for the purposes of proving lawfulness, and is the document solicitors and lenders look for when unauthorised-looking work shows up in a survey or a title check.

Proposed development vs an existing use — the two certificate types

Which certificate you need depends on whether the work is planned or already done.

Certificate of Lawfulness for Proposed Use or Development (LDCP)

Confirms, before you build, that a specific extension, loft conversion, outbuilding or use falls within your permitted development rights, so no planning application is needed. Useful where you want written certainty before committing to a project — for example ahead of a sale, or where a neighbour has raised a query.

Certificate of Lawfulness for Existing Use or Development (LDCE)

Confirms that work already carried out, or a use already established, is lawful — either because it fell within permitted development at the time, or because it has continued unchallenged for the statutory period (generally four years for a building operation or an unauthorised use as a single dwellinghouse, and ten years for most other unauthorised uses). This is the route most often needed at the point of sale, when a survey flags work with no paper trail.

LDC vs full planning permission for a London project
FactorLawful Development CertificateFull Planning Permission
What it confirmsThat work is lawful and needs no permissionPermission to build, subject to conditions
Typical drawing packageFrom £950£1,600–£2,400
Assessment basisFact — does it meet permitted development rulesJudgement — design, amenity, neighbour impact
Best forExtensions, lofts and uses within PD rightsWork exceeding PD limits or needing design sign-off
Statutory determination period8 weeks (typical)8 weeks for householder applications
FAQ

Lawful Development Certificate Drawings in Feltham TW13 — FAQs

How much does a Lawful Development Certificate cost?+
Our LDC drawing and application packages typically start from £950, depending on the complexity of the project and the evidence required. We agree a fixed fee upfront, before any drawing work begins.
How long does an LDC application take to be decided?+
Councils have a statutory eight-week period to determine most LDC applications, similar to a householder planning application. We prepare a complete, evidence-backed package to avoid the delays that come from a council requesting further information.
What happens if the council refuses my LDC application?+
If a certificate is refused, the underlying work is not automatically unlawful — it simply means the council disputes that it falls within permitted development. We assess this risk before you apply, and where a certificate is unlikely to succeed we recommend a full planning application instead.
Do I need an architect for a Lawful Development Certificate?+
No. As an MCIAT-chartered architectural technologist practice, we prepare the same council-accepted drawings and evidence an architect would, typically at a lower fee, and submit via the Planning Portal on your behalf.
Is an LDC the same as building regulations approval?+
No. An LDC only addresses planning lawfulness. Building regulations approval, covering structural safety, fire and insulation standards, is a separate process and is still needed for most building work, even where no planning permission is required.
Do I need planning permission for an extension in Hounslow?+
It depends on the area. The interwar semis of Osterley, Hounslow and Feltham often retain permitted development rights for rear extensions and lofts, while the Chiswick terraces and Bedford Park sit within conservation areas where those rights are removed. We check your address against the designations first and can confirm permitted development with a Lawful Development Certificate.
What extra control applies in Bedford Park?+
Bedford Park is one of West London's most tightly controlled conservation areas, with detailed control over materials, rooflines, windows and front elevations. A standard permitted-development dormer or cladding change usually won't apply; instead we design to the area's Arts-and-Crafts character and prepare a full householder application with the elevations and materials the council expects.
Does Heathrow or the river affect my Hounslow project?+
They can. Toward the west of the borough, aircraft-noise considerations near Heathrow may influence habitable-room and glazing design, and along the Thames at Strand-on-the-Green and Isleworth the flood zone must be addressed. We evidence these considerations within the application where they apply so the council can validate and approve without repeated revisions.
How long does Hounslow Council take to decide?+
Hounslow determines most householder applications within the statutory eight-week period once validated; Bedford Park, conservation and riverside cases can involve additional consultation. We prepare submissions to the council's validation checklist to avoid the drawing queries that cause most delays.
How much do planning drawings cost in Hounslow?+
We agree a fixed fee before starting, typically around 30% below an architect's fee for the same council-accepted drawings, with free redraws until Hounslow approves. A suburban Osterley extension and a Bedford Park application differ in the evidence required, so we quote once we understand your address and project rather than by the hour.
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