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Lewisham Council

Architectural technology in Lewisham

Planning drawings, building regulations, loft conversions, house extensions and mansards — delivered across Lewisham by MCIAT chartered technologists with deep knowledge of Lewisham Council's policies.

Lewisham at a glance

Planning authority
Lewisham Council
Population
302,000
Conservation areas
30
Article 4 Direction
No borough-wide
Postcodes
SE3, SE4, SE6, SE8, SE12, SE13, SE14, SE23, SE26
Typical housing
Victorian and Edwardian terraces across Brockley, Honor Oak, Forest Hill

Technical drawings reviewed on tablet — architectural drawings in Lewisham
Services available in Lewisham

Every architectural service in Lewisham — one chartered team.

Planning Drawings in Lewisham

Building Regulations Drawings in Lewisham

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...

Loft Conversions in Lewisham

Every loft type across every Lewisham roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...

House Extensions in Lewisham

The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...

Mansard Roof Extensions in Lewisham

Lewisham's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...

Garage Conversions in Lewisham

Turn your unused Lewisham garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...

Basement Conversions in Lewisham

Full architectural technology service for basement digs and cellar conversions in Lewisham — structural underpinning design, waterproofing...

Structural Calculations in Lewisham

Chartered structural engineer calculations for every residential intervention in Lewisham — steel beams, lintels, pad foundations, wall re...

Measured Building Surveys in Lewisham

Measured surveys across Lewisham — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...

Party Wall Services in Lewisham

End-to-end Party Wall Act 1996 service for Lewisham — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...

Rear Dormer Loft Conversions in Lewisham

London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Lewisham property,...

Lewisham planning context

Planning in Lewisham

Housing stock: Victorian and Edwardian terraces across Brockley, Honor Oak, Forest Hill; 1930s semi-detached in Catford and Hither Green; post-war mixed in Deptford.

Character: Generally permissive planning compared to central boroughs; loft conversions and side-return extensions routinely approved under PD.

Notable conservation areas: Blackheath, Deptford High Street, Forest Hill, Hither Green, Lee Green

Architectural technology in Lewisham — a London terraced street of the type we survey
A london terraced street of the type we survey — architectural technology in Lewisham.
Nearby boroughs

Boroughs adjacent to Lewisham

Victorian terraced street in Forest Hill SE23
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All services in Lewisham

What we do in Lewisham

Planning Drawings in Lewisham

Building Regulations Drawings in Lewisham

A construction-ready drawing package compliant with every Approved Document — Part A structure, Part B fire, Part L thermal, Part M accessib...

Loft Conversions in Lewisham

Every loft type across every Lewisham roof line — dormer, mansard, hip-to-gable, L-shape, Velux. LDC or full planning route, building regu...

House Extensions in Lewisham

The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical p...

Mansard Roof Extensions in Lewisham

Lewisham's most space-efficient loft solution when PD-route dormers are blocked. Our chartered team designs mansards that get approved in ...

Garage Conversions in Lewisham

Turn your unused Lewisham garage into a bedroom, home office or open-plan kitchen-diner. Planning route assessment, full building regulati...

Basement Conversions in Lewisham

Full architectural technology service for basement digs and cellar conversions in Lewisham — structural underpinning design, waterproofing...

Structural Calculations in Lewisham

Chartered structural engineer calculations for every residential intervention in Lewisham — steel beams, lintels, pad foundations, wall re...

Measured Building Surveys in Lewisham

Measured surveys across Lewisham — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 point-cloud scanning,...

Party Wall Services in Lewisham

End-to-end Party Wall Act 1996 service for Lewisham — Section 1, 3 and 6 notices, schedule of condition surveys, party wall award coordina...

Rear Dormer Loft Conversions in Lewisham

London's most popular loft type — the full-width rear dormer. Planning or Permitted Development route assessed for your Lewisham property,...

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An architectural technologist checking a printed set of house drawings, marking a proposed elevation in red — architectural technology in Lewisham
Every set is checked line by line against the validation checklist before it leaves the office.

Which postcode districts around Lewisham do we cover for drawing package work?

Every Lewisham postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. Lewisham fees below are the statutory England rates for 2026, not drawing package estimates.

PostcodeAreaDominant stockWhat it means for a drawing package
SE12Lee / Grove ParkVictorian and Edwardian terraces across BrockleySE12 straddles a boundary: Lee / Grove Park addresses fall to Lewisham Council or Bromley Council, so confirm which authority validates the drawing package before submitting SE12 drawings.
SE13Lewisham / Hither GreenVictorian terraces, post-war flatsSE13 covers Lewisham / Hither Green only; Lewisham Council handles the drawing package, and Lewisham / Hither Green case officers apply the SE13 conservation-area map.
SE14New CrossVictorian and Edwardian terraces across BrockleyNew Cross sits wholly inside SE14, so Lewisham Council validates every drawing package submitted from an SE14 address.
SE23Forest Hill / Honor OakVictorian villas, Edwardian terracesA drawing package at an SE23 address in Forest Hill / Honor Oak is determined by Lewisham Council under its own Local Plan policies for Forest Hill / Honor Oak.
SE26SydenhamVictorian villas, Edwardian terracesSE26 straddles a boundary: Sydenham addresses fall to Lewisham Council or Bromley Council, so confirm which authority validates the drawing package before submitting SE26 drawings.
SE3Blackheath / KidbrookeGeorgian villas, Victorian terracesBlackheath / Kidbrooke is split at SE3. Either Greenwich Council or Lewisham Council can determine a drawing package here, so the SE3 address is checked against both policies maps first.
SE4BrockleyVictorian and Edwardian terracesA drawing package at an SE4 address in Brockley is determined by Lewisham Council under its own Local Plan policies for Brockley.
SE6Catford / Bellingham1930s semi-detached, post-war flatsSE6 covers Catford / Bellingham only; Lewisham Council handles the drawing package, and Catford / Bellingham case officers apply the SE6 conservation-area map.

Which Lewisham neighbourhoods suit a drawing package best?

Roof pitch, wall build-up and plot depth change every few Lewisham streets, and each one changes what a drawing package can achieve at that address.

Does Lewisham planning policy restrict a drawing package?

Lewisham conservation designations: there are 30 across Lewisham Council, Hither Green, Lee Green, Blackheath among them. Designation costs a Lewisham owner the permitted-development route: a drawing package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Forest Hill is the Lewisham designation that most often changes a drawing package design.

Article 4 and your Lewisham drawing package: Lewisham Council has made no borough-wide direction, so permitted development for a drawing package in Lewisham generally survives outside Lewisham conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SE4 owner records that a drawing package was lawful.

What Lewisham is built from: Victorian and Edwardian terraces across Brockley, Honor Oak, Forest Hill; 1930s semi-detached in Catford and Hither Green; post-war mixed in Deptford. Generally permissive planning compared to central boroughs; loft conversions and side-return extensions routinely approved under PD. That mix decides the drawing package route in Lewisham more than the postcode does, and it is what a Lewisham Council case officer reads first. A householder application costs £548 paid to Lewisham Council direct, with 8 weeks to a decision once validated.

What happens if a Lewisham property sits on a boundary?

Sources for this Lewisham drawing package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.

What are the chances of approval in Lewisham?

Over the 12 quarters from 2023 Q2 to 2026 Q1, Lewisham decided 2,037 householder planning applications and approved 86.3% of them — 3.3 percentage points above the London average of 83%. That places Lewisham 12th of 32 London boroughs on householder approval rate. These are decisions the council reported to MHCLG, not our own sample.

86.3%of householder applications approved
1,757approved in Lewisham
280refused over the same period
95.3%decided within 8 weeks
Lewisham planning decisions, 2023 Q2 to 2026 Q1
MeasureLewishamContext
Householder applications decided2,03777,680 across London
Householder approval rate86.3%83% London average
Decided within 8 weeks95.3%9th fastest of 32 boroughs
Took longer than 13 weeks2.0%the applications that overran the statutory target
Minor dwellings approval rate60.7%new-build and conversion schemes under 10 units
All application types83.4%across 4,264 decisions
Certificates of lawfulness issued1,221confirmations that work was permitted development

Speed matters as much as the odds. Lewisham decided 95.3% of householder applications inside the eight-week statutory period and let 2.0% run past thirteen weeks. A drawing package that is complete and correctly described at validation is the part of that timeline you control; the rest belongs to the council's caseload.

Source: MHCLG District Planning Application Statistics (PS1 and PS2), 2023 Q2 to 2026 Q1, published quarterly by the Ministry of Housing, Communities and Local Government. Counts are decisions made in the window, not applications submitted. Contains public sector information licensed under the Open Government Licence v3.0.

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Neighbourhoods we cover in Lewisham

9 Lewisham neighbourhoods

We've delivered architectural drawings across every part of Lewisham. Each neighbourhood has its own conservation context and dominant housing stock — click through for area-specific guidance.

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