Do HMOs need planning permission in Southwark?

Southwark has 480 active Article 4 directions in our records. Where an Article 4 direction applies, permitted development rights to convert a home (use class C3) to a small HMO (C4) can be removed, so a full planning application is required. Coverage varies — verify with the council before relying on this.

When does an HMO need a licence in Southwark?

Nationally, a property let to 5 or more occupants forming 2 or more separate households and sharing a kitchen, bathroom or toilet must hold a mandatory HMO licence — this applies in every council in England, including Southwark. Some councils also run additional or selective licensing schemes covering smaller HMOs; check the current schemes with Southwark council.

What are the minimum room sizes for a licensed HMO?

A mandatory HMO licence enforces national minimum sleeping-room floor areas: 6.51 m² for one person aged over 10, 10.22 m² for two people over 10, and 4.64 m² for a child under 10. These are national statute and apply in Southwark.

Astor Place · Borough Intelligence

Southwark HMO & Article 4 planning

3630 applications in the last 12 months · Records run to 23 September 2026 — we cannot currently reach this council, so this will not update. · Analysis updated 20 Sep 2026 · Low confidence

Grade – 3630 apps (12 mo)

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Astor analyst's read

Southwark — 480 active Article 4 directions in our records, only 2 HMO-specific; verify council stance before HMO work.

Profile

Inner South London, dense mixed-use stock spanning Victorian terraces, post-industrial regeneration zones, and modern flatted development.

Planning

480 active Article 4 directions recorded — heavy regulatory footprint mostly non-HMO focused; council verification essential for HMO-specific restraint.

Deal angle

HMO play uncertain: only 2 HMO-specific A4 directions in our records against 480 total, but likely data sync lag — check directly with council before committing.

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

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Map Article 4 zones (oxblood = HMO-related) · application pins · click for detail

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Investment Grade

A: select with confidence · B: selectable with discipline · C: case-by-case · D: avoid unless exceptional

Insufficient data for southwark (3571 apps, 2692 decided).

92%

Approval Rate · 12-mo trend

7.5w

Avg Decision

3630

Apps (12 mo)

Council Profile

Planning stance Unknown — insufficient data

Decision speed Unknown

Article 4 directions (planning.data.gov.uk) 480 directions recorded — HMO, conservation areas restrictions apply. Full breakdown ↓

Investment Assessment

HMO viability Unknown — see Article 4 status — Article 4 restrictions apply, see below ↓

Commercial conversion Unknown

Timing outlook by type

Householder

Data unavailable

Change of use

Data unavailable

Major development

Data unavailable

Prior approval

Data unavailable

Application types breakdown

Type	Count	Decided	Approval	Avg weeks	Risk	Investor notes
Other	1034	829	92%	7.1	unknown	Insufficient data for AI assessment.
Residential Extension / Householder	755	596	92%	7.6	unknown	Insufficient data for AI assessment.
Commercial / Retail / Food & Beverage	377	248	90%	8.0	unknown	Insufficient data for AI assessment.
New Build Residential	279	185	94%	9.6	unknown	Insufficient data for AI assessment.
HMO / House in Multiple Occupation	261	170	92%	9.1	unknown	Insufficient data for AI assessment.
Listed Building / Heritage	257	215	93%	6.0	unknown	Insufficient data for AI assessment.
Tree Works	167	141	97%	3.7	unknown	Insufficient data for AI assessment.
Advertisement / Signage	102	66	92%	8.2	unknown	Insufficient data for AI assessment.
Change of Use	92	65	75%	8.3	unknown	Insufficient data for AI assessment.
Lawful Development Certificate	81	61	92%	6.5	unknown	Insufficient data for AI assessment.
Demolition	75	57	98%	8.3	unknown	Insufficient data for AI assessment.
Prior Approval / Permitted Development	51	31	84%	10.7	unknown	Insufficient data for AI assessment.
Discharge of Condition	22	17	100%	10.3	unknown	Insufficient data for AI assessment.
Telecommunications	13	7	86%	6.1	unknown	Insufficient data for AI assessment.
New Build Commercial / Industrial	4	4	100%	8.5	unknown	Insufficient data for AI assessment.
Mixed Use Development	1	0	0%	—	unknown	Insufficient data for AI assessment.

Analyst notes & data quality

Run after more applications have been scraped and decided.

HMO Requirements in Southwark

What it takes to run a House in Multiple Occupation in Southwark — 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 Southwark ↗ · 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) in 2 designated areas 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 Southwark. 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 Southwark Council before relying on this. gov.uk: HMO licences ↗

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

HMO conversion (C3→C4)

Requires full planning permission — permitted development rights removed.

2 designated areas Relevant to: lender, investor, developer

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)

These 2 directions each apply to a specific designated area — not the whole borough. Check if your property falls within one.

Houses in multiple occupation: Bywater Place, SE16 HMO

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

Southwark HMO & Article 4 planning

See the full picture for Southwark

HMO Requirements in Southwark

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