Astor Place · Borough Intelligence

Hertsmere HMO & Article 4 planning

301 applications in the last 12 months · Current to 7 November 2026 via the council's own planning portal. · Analysis updated 01 Nov 2026 · Low confidence

Grade – 301 apps (12 mo)
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Astor analyst's read

Hertsmere — outer suburban Herts borough; 301 applications in 12m, light regulatory footprint in our records.

Profile

Outer Hertfordshire commuter belt; predominantly suburban low-density family housing and semi-detached stock.

Planning

no Article 4 restriction is recorded in our data (verify directly with the local authority) recorded in our database — verify HMO restrictions directly with Hertsmere Council, as coverage may be incomplete.

Deal angle

Insufficient data for a confident read — approval rates and refusal patterns unavailable; 301 recent applications suggest active market but bridging/HMO suitability unclear without regulatory detail.

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
Open full map ↗

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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 hertsmere (303 apps, 86 decided).

90%
Approval Rate · 12-mo trend
7.8w
Avg Decision
301
Apps (12 mo)
Council Profile
Planning stance Unknown — insufficient data
Decision speed Unknown
Article 4 directions (planning.data.gov.uk) None found — check council website to verify.
Investment Assessment
HMO viability Unknown — see Article 4 status
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 127 14 79% 6.5 unknown
Insufficient data for AI assessment.
Residential Extension / Householder 93 48 90% 8.5 unknown
Insufficient data for AI assessment.
HMO / House in Multiple Occupation 35 14 100% 9.1 unknown
Insufficient data for AI assessment.
New Build Residential 13 2 100% 8.0 unknown
Insufficient data for AI assessment.
Commercial / Retail / Food & Beverage 9 1 100% 4.3 unknown
Insufficient data for AI assessment.
Listed Building / Heritage 5 2 100% 10.0 unknown
Insufficient data for AI assessment.
Tree Works 5 0 0% 3.9 unknown
Insufficient data for AI assessment.
Change of Use 5 2 100% 11.9 unknown
Insufficient data for AI assessment.
Demolition 3 1 100% 18.3 unknown
Insufficient data for AI assessment.
Telecommunications 3 0 0% — unknown
Insufficient data for AI assessment.
Lawful Development Certificate 3 2 50% 7.0 unknown
Insufficient data for AI assessment.
New Build Commercial / Industrial 1 0 0% — unknown
Insufficient data for AI assessment.
Advertisement / Signage 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 Hertsmere

What it takes to run a House in Multiple Occupation in Hertsmere — 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 Hertsmere ↗ · Article 4 directions ↗

01 · Planning permission
Article 4 status unknown — we hold no records

We hold no Article 4 records at all for Hertsmere — no source we read publishes them for this council, which is not the same as there being none. A direction may be in force, so treat this as unknown and check with the council before assuming a conversion is permitted development.

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 Hertsmere. 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 Hertsmere Council before relying on this. gov.uk: HMO licences ↗

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

We hold no Article 4 records for this borough — no source we read publishes Article 4 data for Hertsmere. That is a statement about our sources, not about the council: a direction may still be in force. Check with the council directly, or the national map ↗, before relying on this either way.
ASTOR UNDERWRITING UNIT // HERTSMERE // DATA SYNC: ACTIVE // PORTAL: VERIFIED  // ANALYSIS: 01 NOV 2026