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Free 2026 London Planning Report — Building Regulations Drawings in Catford SE6

Dormer loft conversion on an Edwardian Corbett Estate terrace in Catford SE6, London Borough of Lewisham
Catford · SE6 · Lewisham

Building Regulations Drawings in Catford SE6

Fixed-fee, MCIAT-chartered building regulations drawings for Catford (SE6) homeowners — London Borough of Lewisham validation and local constraints handled from the start.

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Catford (SE6) in Lewisham is defined by its consistent Edwardian estates — above all the Culverley Green conservation area and the neighbouring Corbett Estate, whose uniform terraces give the area a strong, coherent character. That consistency is exactly what the planning controls here are designed to protect.

The Culverley Green conservation area carries an Article 4 direction controlling householder alterations, and the wider Corbett Estate streets are assessed for their uniform Edwardian frontages, so dormers, extensions and elevation changes need to respect the established pattern. Lewisham's small-HMO Article 4 direction adds a control on conversions. We design Catford schemes to fit that grain.

Dormer loft conversion on an Edwardian Corbett Estate terrace in Catford SE6, London Borough of Lewisham
Isometric illustration of a Catford SE6 home building regulations drawings design
Proposed floor plan
Catford SE6

Planning in Catford (SE6): what to know before you apply

SE6's Culverley Green conservation area carries an Article 4 direction that controls householder alterations within the Edwardian estate, and the surrounding Corbett Estate is valued for its uniform frontages — so extension and loft designs in Catford are judged closely against the established Edwardian pattern. Lewisham's borough small-HMO Article 4 direction is a further control on conversions.

Typical Catford housing stock

The consistent Edwardian terraces of the Culverley Green and Corbett Estate streets, interwar semi-detached houses toward Bellingham, and Victorian and Edwardian housing around Rushey Green and the town centre.

Streets we regularly draw for in Catford

Rushey Green · Bromley Road · Culverley Road · Torridon Road

What SE6 is actually built of

Measured from 511 classified residential buildings in SE6, not from a description of the area.

Catford SE6 housing mix

Residential building form across the SE6 postcode district, from 511 classified buildings.

Attached on more than one side50%
Attached on one side48%
Detached2%
Median building footprint61 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate1.47
Buildings classified511

Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-08-17.

Building Regulations Drawings for Catford (SE6) homes: the package and the process

A Full Plans submission is a technical argument, not a picture. The sheets carry construction build-ups for floors, walls and roof, insulation values and junction details, drainage runs and invert levels, fire escape routes and protected stairs, ventilation provision and the structural elements that carry it all. Building Control checks each against the Approved Documents before work starts.

We coordinate the structural design with the architectural sheets in-house, so the beam sizes on the calculations are the beam sizes on the sections, and the openings your builder prices are the openings that were approved. Where a detail is unusual, we draw it rather than leave it to be resolved on site.

Construction details follow the existing fabric. Solid brick walls, suspended timber floors and uninsulated roofs each need a different build-up to reach the required performance, and a terrace has party wall junctions to detail that a detached house simply does not.

What do building regulations drawings cover?

A building control package translates the approved design into a buildable, compliant specification.

  • Construction sections and detailed junctions
  • Structural drawings and calculations (steel beams, foundations, loadings)
  • Part L thermal performance and insulation specification
  • Fire safety — escape routes, protected structure, alarms
  • Drainage and ventilation layouts

Full Plans or Building Notice — which should I choose?

A Full Plans application has your drawings checked and approved by Building Control before work starts, giving certainty and a document lenders and buyers like to see. A Building Notice lets simpler work start sooner but is inspected as it proceeds, with less up-front certainty. For most London extensions and loft conversions we recommend Full Plans, and prepare the package accordingly. Building regulations are a separate consent from planning permission, and the two are often confused — the explainer on permitted development rights sets out which projects escape a planning application but still need building-regs approval, and Architectural Drawings covers the same building-regs package where you want a chartered practice to carry it through to sign-off.

Why coordinate structural calculations in-house?

When the same team draws the building and calculates its structure, the steel schedule matches the drawings and the builder never waits on a missing detail. It removes the classic gap between an architect's drawings and a separately-appointed engineer's calculations.

Full Plans vs Building Notice for a London project
FactorFull PlansBuilding Notice
Drawings checked before work startsYesNo
Up-front certaintyHigh — approval in writingLower — inspected as built
Best forExtensions, lofts, structural workMinor, simple works
Evidence for lenders and buyersFull approval recordCompletion certificate only
Risk of costly on-site reworkLowHigher if issues are found late
Sheet from a building regulations drawings package drawn for a Catford property in SE6, showing the existing and proposed arrangement at scale
A sheet from the building regulations drawings package we submit to London Borough of Lewisham for Catford (SE6) properties.

Also in Catford SE6

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FAQ

Building Regulations Drawings in Catford SE6 — FAQs

Do I need building regulations approval as well as planning permission?+
Almost always, yes. Planning permission covers what the building looks like; building regulations cover how safely it is built. Most extensions and loft conversions need both.
How long does Building Control approval take?+
A Full Plans application is typically assessed within about five weeks. We prepare a complete package and respond to any conditions promptly, so approval is not held up by missing detail.
Can building regulations drawings be done after planning approval?+
Yes. Many homeowners secure planning permission first, then commission the building regulations package before starting on site. We can pick a project up at either stage.
Are structural calculations included?+
Yes — we produce structural drawings and calculations in-house as part of the building regulations package, so your builder has everything to price and build.
Can you submit to Building Control for me?+
Yes, we prepare and submit the Full Plans package and respond to any Building Control queries.
Do I need planning permission for a side-return extension in Lewisham?+
On the Victorian and Edwardian terraces of Brockley, Forest Hill and Hither Green a single-storey side-return or rear extension can fall within permitted development, so a full application isn't always needed. Conservation areas such as Blackheath, Brockley and Telegraph Hill restrict this. We check your street's designation first and can confirm permitted development with a Lawful Development Certificate where it qualifies.
What does Lewisham's borough-wide HMO Article 4 direction affect?+
Lewisham applies a borough-wide Article 4 direction removing permitted development rights for change of use to an HMO (C3 to C4), so a conversion to a house in multiple occupation needs a full application anywhere in the borough. It doesn't affect a standard family extension or loft, but we confirm whether it applies to your intended use before advising on a route.
Can I convert the loft on my Lewisham terrace?+
Usually, yes. The terraces of Brockley, Forest Hill and Hither Green suit hip-to-gable and dormer loft conversions, which frequently qualify as permitted development within the volume limits. Outside the conservation areas this is often the quickest route. We confirm eligibility against those limits and any designation, then produce the planning and building-regulations drawings.
How long does Lewisham Council take to decide?+
Lewisham determines most householder applications within the statutory eight-week period once validated; conservation cases can attract additional consultation. The dense terraced streets are party-wall-sensitive, so the commonest delay is a drawing query — we prepare submissions to the council's validation checklist to keep them moving.
How much do planning drawings cost in Lewisham?+
We agree a fixed fee before starting, usually around 30% below an architect's fee for the same council-accepted drawings, with free redraws until Lewisham approves. A side-return, a loft and a conservation-area scheme differ in complexity, so we quote once we understand your street and project rather than charging by the hour.
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