Astor Holdings · Borough Intelligence

Hounslow HMO & Article 4 planning

2539 applications in the last 12 months

Astor analyst's read

Hounslow — 2,539 applications in 12m; 4 Article 4 directions in our records (2 HMO-specific). Verify council registers for complete footprint.

Profile

Outer west London suburban borough, mixed density, significant family housing and older terraced stock alongside modern residential development.

Planning

4 active Article 4 directions in our records (2 HMO-specific); high application volume suggests permissive climate but council registers should be verified for complete A4 picture.

Deal angle

HMO-related Article 4 presence suggests selective regulatory caution; high volume may indicate accessible bridging market but verify actual HMO consent patterns with council before committing.

ASTOR UNDERWRITING UNIT // AI SYNTHESIS // VERIFY WITH COUNCIL BEFORE ACTING

Map Article 4 zones (oxblood = HMO-related) · application pins · click for detail
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Borough intelligence will appear here once analysis has been run for Hounslow.

HMO Requirements in Hounslow

What it takes to run a House in Multiple Occupation in Hounslow — whether you need planning permission, the licence the property must hold, and the statutory minimum room sizes. Verify current details with the council before committing.

Full guides: HMO licensing in Hounslow ↗ · Article 4 directions ↗

01 · Planning permission
Planning permission required for small HMOs

An Article 4 direction removes permitted development rights for small HMOs (C3→C4) across the whole borough in our records — converting a family home to a small HMO needs full planning permission here. Confirm whether your property falls within the designated area.

See the full Article 4 picture below ↓
02 · Licence to operate
Mandatory HMO licence National
5 or more occupants forming 2 or more separate households

Any HMO occupied by five or more people making up two or more separate households (sharing a kitchen, bathroom or toilet) must hold a mandatory HMO licence. This applies in every council in England, regardless of the number of storeys.

No Additional or Selective licensing scheme in our records for Hounslow. Many boroughs operate schemes that extend licensing to smaller HMOs or all rented homes, and these change on five-year cycles — check the council's current designation via the gov.uk licence finder ↗.
03 · Minimum room sizes
One person aged over 10 6.51 m²
Two people aged over 10 10.22 m²
One person aged under 10 4.64 m²
Any sleeping room ≥ 4.64 m²
Kitchen, bathroom & WC standards

Licensed HMOs must provide adequate, well-located cooking, washing and toilet facilities for the number of occupants, plus safe gas/electrics, working fire detection and proper waste storage. The exact ratios (occupants per bathroom, per WC, kitchen size) are set by each council in its own HMO amenity standards — confirm the figures with the borough before committing to a scheme.

Minimum room sizes and the mandatory-licensing threshold are national law (Licensing of Houses in Multiple Occupation (Mandatory Conditions of Licences) (England) Regulations 2018), sourced under the Open Government Licence v3 — they apply in every council. Licensing designations shown are those in our records; verify the current position and exact amenity standards with Hounslow Council before relying on this. gov.uk: HMO licences ↗

Article 4 Directions in Hounslow planning.data.gov.uk

HMO conversion (C3→C4)
Requires full planning permission — permitted development rights removed.
borough-wide Relevant to: lender, investor, developer
Commercial to residential (Class MA / Prior Approval)
Fast-track Prior Approval route is blocked — full planning permission required.
certain designated areas Relevant to: developer, investor
Conservation area restrictions (1 designated area)
Extensions, roof alterations, and window/door changes require planning permission within these areas.
specific conservation areas only — not borough-wide Relevant to: buyer, developer, lender
HMO Restrictions (2)
All of these restrictions apply across the entire borough.
Borough-wide Article 4 (HMO) — Hounslow HMO since 2020
HMO Conversion (C3→C4)
Converting a family home (C3) to a small HMO of up to 6 people (C4) requires full planning permission — permitted development rights have been removed.
Relevant to: lender, developer, investor
Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction HMO since 2023
HMO Conversion (C3→C4)
Converting a family home (C3) to a small HMO of up to 6 people (C4) requires full planning permission — permitted development rights have been removed.
Relevant to: lender, developer, investor
Commercial / Employment Zone Designation
This direction applies to a designated commercial or employment area (such as an industrial estate, employment land, town centre, or retail zone). It restricts permitted development rights within that commercial zone and has no effect on residential property.
Relevant to: developer
Change of Use / PDR (1)
Check the direction document to confirm the geographic extent.
Change of use or development that would result in new dwellings (Class MA/ZA) since 2025
Commercial to Residential (Class MA)
Converting commercial premises (Class E: offices, retail, cafés, light industrial) to homes requires full planning permission — the fast-track Prior Approval route is blocked here.
Relevant to: developer, investor
Conservation Area (1)
This restriction applies only within designated areas — it does not affect the whole borough.
Article 4(2) directions for Bedford Park and Gunnersbury Conservation areas since 2001
Conservation Area — Alterations & Extensions
In this conservation area, extensions, roof alterations and cladding to homes require planning permission — you cannot rely on permitted development rights.
Relevant to: buyer, developer, lender
ASTOR UNDERWRITING UNIT // HOUNSLOW // DATA SYNC: ACTIVE // PORTAL: VERIFIED