Flat 4, 9 Compayne Gardens, London, NW6 3DG

UPRN:5205647Converted Flat4 bedsBuilt -

LeaseholdCouncil Tax: Band GEPC: -

Data freshness:Listing· freshPrice Paid· freshPlanning· 3mo agoRisk· 5mo agoConnectivity· 1mo agoAmenities· 1mo agoArea· Census 2021

Flat 4, 9 Compayne Gardens, London, NW6 3DG

HP Score

/ 100

Strong

Verdict

yesterday

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Strong fundamentals; flood risk not assessed

Evidence

17 of 21 sources

Sale Estimate

£938,000

£844k - £1.03MMedium

Estimate

£938k

Range

£844k – £1.03M

Rent Estimate (pcm)

£3,250

£3k - £4k

Monthly

£3,250

Yield

3.12%

Verdict

Derived from HomePortfolio scores

Flat 4 earns an INVESTIGATE rating with HP Score 78/100. Investment score 63/100 reflects moderate fundamentals. Crime intensity is low. Walkability is excellent (91/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is leasehold. Every figure here comes from the live HomePortfolio API; anything it does not publish is left out.

Key SourcesPortal listingsMarket estimates (third-party AVM)HM Land Registry sales matched to addressDefra strategic noise mapping, England Round 4 (Contains Defra data © Crown copyright and database right 2023-2024, Open Government Licence v3.0)Walk ScoreONS Census 2021Police.ukHM Land Registry company ownershipHM Land Registry covenantsHM Land Registry leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

78/ 100

Strong

Investment Score

63/ 100

Moderate

Crime Score

23/ 100

Moderate

Walkability

91/ 100

Excellent

Transit & Bike

Transit 98Bike 72

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 3 Nov 2026

This rests largely on a single source. Treat the score as a prompt to investigate, not a conclusion.

Check before relying on this score: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge-0.6/15
claims [AVM -33.3% (MEDIUM)] → measured edge -0.12pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp; asking more than 10% above the estimate (measured -0.33pp)
Market estimate used (MEDIUM confidence) · snapshot 13 Oct 2026
- valuation_snapshotsestimate for 5205647· as of 13 Oct 2026
Rental economics0/40
gross yield 3.1%; range width penalty ×0.74
- valuation_snapshotsrent estimate 3250/mo (range 2900-3650)· as of 13 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -3,015/mo, -93% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 3 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 0 price cut(s), 57 days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge
- portal_listingsprice_changes + first_published_date· as of 3 Nov 2026
Risk & liquidity12.8/15
457 sales/12mo in area; valuation range width 20%
- property_intelligencetransactions_12mo

4 of 4 components scored. Ranks on gross yield, the stress margin, risk and disclosed facts. A pricing claim earns only its measured edge: today 0 for the market estimate and at most +0.5pp for sold evidence. The score itself is not yet checked against the outcomes of homes it scored.

Economics

What happens to your money

Price sensitivity

£937,500£1,437,500

The same scorer re-run at hypothetical asking prices, holding rent, comps and listing history constant. Not a prediction of what the seller would accept.

Your assumptions

Purchase price£1,250,000

At the asking price

Monthly rent£3,250/mo

Evidenced range £2,900-£3,650

Interest rate5.4%

Loan to value75%

Cash required: £445,050
Net cash flow: -£1,969/mo
Cash on cash: -5.3%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.77 - below the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Evidence

Where every number comes from

valuation_snapshotsestimate for 5205647Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 3250/mo (range 2900-3650)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 3 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 3 Nov 2026
property_intelligencetransactions_12moRisk & liquidity

Sold comparables in depth

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion
Rental economics needs verification before you rely on it
rent estimate 3250/mo (range 2900-3650)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

Plan

Before you offer

1. Get two written rental appraisals from local lettings agents.
The rent estimate rests on area-level evidence, not lettings on this street.
2. Commission a full structural survey, not a basic condition report.
The score prices market evidence, not the fabric of the building.

Every step above was generated from a specific gap or flag in the evidence - no generic advice, no invented tasks.

Valuation & Market

Sale Estimate£938,000

Rent Estimate (pcm)£3,250

Gross Yield3.12%

1y Growth-

3y Growth+0.1%

5y Growth-0.8%

10y Growth+0.0%

Last Sold Price£625,000 (2011-04-26)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

1NW6 3DG

Approval Rate

100%12mo

Development

low

2026/4824/T
FRONT GARDEN: 1 x Ash (T1) - Reduce main upper crown to previous pruning points not to breach new heartwood in pruning by returning to small diameter points in pruning points.
Pending
2026/4825/T
FRONT GARDEN: 1 x Ash (T1) - Reduce back to holistic reduction points, (3m) in order to prevent failure of branches over public footpath and communal gardens. 1 x Plum & 1 x Amelanchier (G1) - Reduce back to previous pruning points, (1m -1.5m) in order to prevent overhang over public footpath and excessive shading to lower ground windows of property. REAR GARDEN: (T2) Indian Bean - Reduce overhang over the garages by up to 3m in order to prevent failure of tree or branches. 4 x Laurel (G2) - Trim lateral spread by up to 0.5m and reduce height by approx. 1m to prevent excessive shading to rear of property.
Pending
2026/4818/T
REAR GARDEN: 1 x Lime (T1) - Reduce to previous, most recent pruning points, (approx. 2m - 3m).
Pending

View Planning Timeline

Ownership

Corporate Ownership57.8%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2011-04-26
SourceLand Registry

View Ownership Details

Connectivity

Broadband (-)

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£44,088

Population Density13,708 /km²

Owner Occupied30%

Age Distribution

0-15 16%16-64 72%65+ 12%

View Area Profile

Schools Nearby

Broadhurst School
0.2 mi
Inspected by ISI
Alleyns Hampstead Nursery and Junior School
0.3 mi
Inspected by ISI
Holy Trinity CofE Primary School, NW3
0.3 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.
South Hampstead High School GDST
0.3 mi
Inspected by ISI

2 of 5 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

1 Compayne Gardens
-
£641k
-
1 Compayne Gardens
-
£620k
-
5 Compayne Gardens
-
£4.19M
-
9 Compayne Gardens
-
£375k
-

Boundary data not available for this property

No registered title polygon, building footprint, or street match for this property yet.

Why: No HMLR INSPIRE / OSM footprint / OS Open USRN match for this UPRN

Source: HM Land Registry INSPIRE / OpenStreetMap / OS Open USRN