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Hillingdon Council

Architectural technology in Hillingdon

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

Hillingdon at a glance

Planning authority
Hillingdon Council
Population
306,000
Conservation areas
29
Article 4 Direction
No borough-wide
Postcodes
HA4, HA5, HA6, UB3, UB4, UB7, UB8, UB9, UB10, UB11
Typical housing
1930s semi-detached dominates
Architectural detail on a London period property — architectural drawings in Hillingdon
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MCIAT chartered drawings for planning, building regs, lofts and extensions — fixed fees 30% below typical London architects. Tell us what you need and we’ll reply the same working day.

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Services available in Hillingdon

Every architectural service in Hillingdon — one chartered team.

Planning Drawings in Hillingdon

A fixed-fee, end-to-end service — measured survey, scaled drawings, Design & Access Statement where required, Planning Portal submission, an...

Building Regulations Drawings in Hillingdon

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 Hillingdon

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

House Extensions in Hillingdon

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

Mansard Roof Extensions in Hillingdon

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

Garage Conversions in Hillingdon

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

Basement Conversions in Hillingdon

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

Structural Calculations in Hillingdon

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

Measured Building Surveys in Hillingdon

Fixed-fee measured surveys across Hillingdon from £540 — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 p...

Party Wall Services in Hillingdon

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

Rear Dormer Loft Conversions in Hillingdon

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

Hillingdon planning context

Planning in Hillingdon

Housing stock: 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow.

Character: Largest outer west London borough; significant Green Belt; Heathrow noise contours affect planning decisions in Harmondsworth and Sipson.

Notable conservation areas: Uxbridge, Ruislip Village, Northwood, Harefield, Ickenham

Nearby boroughs

Boroughs adjacent to Hillingdon

1930s semi-detached street in Ruislip HA4
MCIAT Chartered council-ready drawing review Fixed fees from £840 All 33 London boroughs
All services in Hillingdon

What we do in Hillingdon

Planning Drawings in Hillingdon

A fixed-fee, end-to-end service — measured survey, scaled drawings, Design & Access Statement where required, Planning Portal submission, an...

Building Regulations Drawings in Hillingdon

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 Hillingdon

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

House Extensions in Hillingdon

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

Mansard Roof Extensions in Hillingdon

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

Garage Conversions in Hillingdon

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

Basement Conversions in Hillingdon

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

Structural Calculations in Hillingdon

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

Measured Building Surveys in Hillingdon

Fixed-fee measured surveys across Hillingdon from £540 — floor plans, elevations and sections to ±3mm accuracy. Leica Disto laser + BLK360 p...

Party Wall Services in Hillingdon

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

Rear Dormer Loft Conversions in Hillingdon

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

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Where in Hillingdon does a drawing package actually get determined?

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

PostcodeAreaDominant stockWhat it means for a drawing package
UB3Hayes / Harlington1930s semi-detached, post-war estatesA drawing package at an UB3 address in Hayes / Harlington is determined by Hillingdon Council under its own Local Plan policies for Hayes / Harlington.
UB4Hayes / Yeading1930s semi-detached, post-war estatesUB4 covers Hayes / Yeading only; Hillingdon Council handles the drawing package, and Hayes / Yeading case officers apply the UB4 conservation-area map.
UB7West Drayton / Sipson / Harmondsworth1930s semi-detached, post-warUB7 covers West Drayton / Sipson / Harmondsworth only; Hillingdon Council handles the drawing package, and West Drayton / Sipson / Harmondsworth case officers apply the UB7 conservation-area map.
UB8Uxbridge / CowleyGeorgian fragments, 1930s semi-detached, post-war flatsUB8 covers Uxbridge / Cowley only; Hillingdon Council handles the drawing package, and Uxbridge / Cowley case officers apply the UB8 conservation-area map.
UB9Denham / HarefieldTudor and Georgian fragments, 1930s semi-detachedUB9 covers Denham / Harefield only; Hillingdon Council handles the drawing package, and Denham / Harefield case officers apply the UB9 conservation-area map.
UB10Hillingdon / Ickenham1930s semi-detached, Tudor fragmentsA drawing package at an UB10 address in Hillingdon / Ickenham is determined by Hillingdon Council under its own Local Plan policies for Hillingdon / Ickenham.
UB11Stockley Park1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near HeathrowA drawing package at an UB11 address in Stockley Park is determined by Hillingdon Council under its own Local Plan policies for Stockley Park.
HA4Ruislip1930s semi-detached, Tudor cottagesRuislip sits wholly inside HA4, so Hillingdon Council validates every drawing package submitted from an HA4 address.

Which Hillingdon neighbourhoods suit a drawing package best?

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

How do conservation areas and Article 4 affect a drawing package in Hillingdon?

Conservation areas covering Hillingdon: Hillingdon Council runs 29, and Uxbridge, Ruislip Village, Northwood are the ones Hillingdon owners meet most. A drawing package inside a Hillingdon conservation area loses permitted development, so the Hillingdon submission is a householder application at £258 decided in 8 weeks — not a £120 prior approval decided in 6 weeks. In Ickenham a drawing package is judged on the street elevation first.

Hillingdon permitted development status: there is no borough-wide direction from Hillingdon Council, so a drawing package at a HA4 address is normally still permitted development. We certify that with a £129 Lawful Development Certificate rather than leaving a Hillingdon sale to argue it later.

Hillingdon housing stock: 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow. Largest outer west London borough; significant Green Belt; Heathrow noise contours affect planning decisions in Harmondsworth and Sipson. Read that before choosing a drawing package route in Hillingdon — construction, not postcode, sets what is achievable. Architectural drawings in Hillingdon start at £840 on a fixed fee, or £1,750 for the Complete package covering both Hillingdon Council submissions.

Who decides a drawing package on the edge of Hillingdon?

Sources for this Hillingdon 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.

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Neighbourhoods we cover in Hillingdon

10 Hillingdon neighbourhoods

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

Further reading

Guides & next steps

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