21 Harkness Close, Bletchley, Milton Keynes, MK2 3NB

UPRN:25064986Semi-Detached House3 bedsBuilt 1967-1975

FreeholdCouncil Tax: Band CEPC: D (65)

Data freshness:Listing· freshPlanning· 1mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

21 Harkness Close, Bletchley, Milton Keynes, MK2 3NB

HP Score

/ 100

Mixed

Verdict

2 days ago

Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate

Evidence

18 of 21 sources

Sale Estimate

£322,000

£306k - £338kHigh

Estimate

£322k

Range

£306k – £338k

Rent Estimate (pcm)

£1,700

£2k - £2k

Monthly

£1,700

Yield

6.48%

Verdict

Derived from HomePortfolio scores

21 Harkness Close earns an INVESTIGATE rating with HP Score 72/100. Investment score 57/100 reflects moderate fundamentals. Crime intensity is low. Walkability is limited (68/100). Flood risk is not assessed: check the Environment Agency long-term flood map before offering. Tenure is freehold. Every figure here comes from the live HomePortfolio API; anything it does not publish is left out.

Key SourcesEPC RegisterPortal listingsOfcom Connected NationsOfcom mobile coverageMarket 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 Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

72/ 100

Mixed

Investment Score

57/ 100

Moderate

Crime Score

25/ 100

Moderate

Walkability

68/ 100

Moderate

Transit & Bike

Transit 18Bike 58

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 2 Nov 2026

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

Valuation edge0/15
claims [AVM +2.2% (HIGH), sold-comps -20.7%, £/sqft -20.8%] → measured edge +0.00pp of the ask; on later-registered sales an AVM discount carried no edge and a sold-evidence gap at most +0.5pp
Market estimate used (HIGH confidence) · snapshot 12 Oct 2026
- valuation_snapshotsestimate for 25064986· as of 12 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 11 comps, dispersion 11%· as of 28 Oct 2026
Rental economics10.7/40
gross yield 6.5%; range width penalty ×0.91
- valuation_snapshotsrent estimate 1700/mo (range 1550-1800)· as of 12 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -209/mo, -12% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); fails the stress - earns nothing
- underwriting_assumptionscosts not disclosed by the advert· as of 2 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 46 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 2 Nov 2026
Risk & liquidity14.7/15
157 sales/12mo in area; valuation range width 10%
- 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

£236,000£362,000

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£315,000

At the asking price

Monthly rent£1,700/mo

Evidenced range £1,550-£1,800

Interest rate5.4%

Loan to value75%

Cash required: £101,550
Net cash flow: £114/mo
Cash on cash: 1.3%
Score at this price: 25

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.60 - clears 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 25064986Valuation edge · as of 12 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 11 comps, dispersion 11%Valuation edge · as of 28 Oct 2026
valuation_snapshotsrent estimate 1700/mo (range 1550-1800)Rental economics · as of 12 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 2 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 2 Nov 2026

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 1700/mo (range 1550-1800)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 46 days on market; homes with a cut sold 0.2-0.3pp further below the cut ask, which is not an edge

Property risk deep-dive →

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. Treat the gap to the estimate as unproven - compare recent sold prices on the street yourself before pricing an offer around it.
On later completions, homes listed below their estimate sold at the same share of the asking price as the rest.
3. 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£322,000

Rent Estimate (pcm)£1,700

Gross Yield6.48%

1y Growth-8.0%

3y Growth-1.1%

5y Growth+0.6%

10y Growth+3.0%

Last Sold Price£230,000 (2019-10-18)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

1MK2 3NB

Approval Rate

-12mo

Development

low

PLN/2026/2231
Prior Approval of single storey rear extension, with eaves of 2.8 metres and maximum height of 3.4 metres, extending 5.0 metres from the original rear wall including demolition of existing extension
Pending
PLN/2026/2020
Part conversion of first floor and upward extension to create second floor, to create 3 no. 1 bedroom and 1 no. 2 bedroom apartments
Pending
PLN/2026/2000
Proposed demolition of the existing timber side garage and proposed single storey side extension
Pending

View Planning Timeline

Ownership

Corporate Ownership55.4%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change2019-10-18
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

5 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£36,061

Population Density3,699 /km²

Owner Occupied60%

Age Distribution

0-15 22%16-64 59%65+ 19%

View Area Profile

Schools Nearby

Bishop Parker Catholic School
0.1 mi
Good
The Premier Academy
0.1 mi
Inspected as Eaton Mill Primary School (URN 110262) on 9 Jul 2009
Drayton Park School
0.3 mi
Inspected as Drayton Park School (URN 130254) on 14 Jun 2017
KWS Milton Keynes
0.3 mi
Good

1 of 11 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

10 Harkness Close
-
£300k
-
6 Harkness Close
-
£300k
-
22 Harkness Close
-
£515k
-
19 Harkness Close
-
£260k
-

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