1 Portmarnock Close, Bletchley, Milton Keynes, MK3 7TH

UPRN:25027353Detached House3 bedsBuilt 1950-1966

FreeholdCouncil Tax: Band DEPC: C (70)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 3mo agoRisk· 5mo agoConnectivity· 1mo agoAmenities· 1mo agoArea· Census 2021Council Tax· 6mo ago

1 Portmarnock Close, Bletchley, Milton Keynes, MK3 7TH

HP Score

/ 100

Strong

Verdict

2 days ago

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

Evidence

18 of 21 sources

Sale Estimate

£423,000

£402k - £444kHigh

Estimate

£423k

Range

£402k – £444k

Rent Estimate (pcm)

£1,900

£2k - £2k

Monthly

£1,900

Yield

5.49%

Verdict

Derived from HomePortfolio scores

1 Portmarnock Close earns an INVESTIGATE rating with HP Score 75/100. Investment score 62/100 reflects moderate fundamentals. Crime intensity is very low. Walkability is limited (49/100). 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 covenantsHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

75/ 100

Strong

Investment Score

62/ 100

Moderate

Crime Score

8/ 100

Low

Walkability

49/ 100

Mixed

Transit & Bike

Transit 22Bike 55

Walk Score, out of 100

Opportunity

Not scored as an opportunity

We will not put a number on this one.

listing is 'Sold subject to contract' - sale already progressing, not an actionable opportunity

Withholding a score is deliberate. A number built on missing or stale inputs would look more certain than the evidence allows.

Economics

What happens to your money

Your assumptions

Purchase price£415,000

At the asking price

Monthly rent£1,900/mo

Evidenced range £1,750-£2,050

Interest rate5.4%

Loan to value75%

Cash required: £136,550
Net cash flow: -£85/mo
Cash on cash: -0.7%
Score at this price: -

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.36 - clears the usual 1.25 test. These are your assumptions, not evidence: only the pre-filled rent and price come from the record.

Risks

What could kill this deal

Score confidence is low
largely a single source - treat the number as a prompt, not a conclusion

Property risk deep-dive →flood, subsidence, crime, environment - the full domain

Plan

Before you offer

1. 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£423,000

Rent Estimate (pcm)£1,900

Gross Yield5.49%

1y Growth-

3y Growth+1.6%

5y Growth+2.8%

10y Growth+3.0%

Last Sold Price£262,500 (2015-02-18)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0MK3 7TH

Approval Rate

-12mo

Development

low

PLN/2026/2038
The construction of a single storey standalone specialist education building, together with associated parking, access and circulation works, hard and soft landscaping, drainage and other ancillary works (Regulation 3 application under the Town and Country Planning General Regulations 1992)
Pending
PLN/2026/1772
Certificate of lawfulness for the proposed removal of single garage doors and installation of double garage doors
Approved
PLN/2026/1335
Certificate of lawfulness for the proposed single storey side extension & conversion of integral garage
Approved

View Planning Timeline

Ownership

Corporate Ownership65.1%
Overseas OwnershipNo
Lease Term Remaining-
CovenantsRestrictive
Lease TypeFreehold
Last Ownership Change2015-02-18
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

1 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£36,061

Population Density-

Owner Occupied74%

Age Distribution

0-15 20%16-64 58%65+ 22%

View Area Profile

Schools Nearby

Milton Keynes Preparatory School
0.2 mi
Inspected by ISI
Howe Park School
0.4 mi
Good
Emerson Valley School
0.6 mi
Inspected as Emerson Valley School (URN 131190) on 18 Oct 2022
Romans Field School
0.6 mi
Good

2 of 10 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

9 Portmarnock Close
-
£390k
-
3 Portmarnock Close
-
£215k
-
1 Portmarnock Close
-
£263k
-
9 Portmarnock Close
-
£250k
-

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