21 Upton Road, Slough, SL1 2AD

UPRN:100080340686Semi-Detached House5 bedsBuilt 1930-1949

FreeholdCouncil Tax: Band DEPC: D (67)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 3mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 1mo ago

HP Score

/ 100

Mixed

Verdict

2 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£531,000

£504k - £557kHigh

Estimate

£531k

Range

£504k – £557k

Rent Estimate (pcm)

£2,800

£3k - £3k

Monthly

£2,800

Yield

4.48%

Verdict

Derived from HomePortfolio scores

21 Upton Road earns an INVESTIGATE rating with HP Score 56/100. Investment score 58/100 reflects moderate fundamentals. Crime intensity is elevated. Walkability is limited (52/100). 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

56/ 100

Mixed

Investment Score

58/ 100

Moderate

Crime Score

72/ 100

Elevated

Walkability

52/ 100

Moderate

Transit & Bike

Transit 18Bike 62

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 6 Nov 2026

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

Valuation edge-1.6/15
claims [AVM -41.2% (HIGH)] → measured edge -0.33pp 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 (HIGH confidence) · snapshot 9 Oct 2026
- valuation_snapshotsestimate for 100080340686· as of 9 Oct 2026
Rental economics0/40
gross yield 4.5%; range width penalty ×0.91
- valuation_snapshotsrent estimate 2800/mo (range 2600-3000)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,236/mo, -44% 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 6 Nov 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 96 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 6 Nov 2026
Risk & liquidity14.6/15
423 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

£562,500£862,500

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£750,000

At the asking price

Monthly rent£2,800/mo

Evidenced range £2,600-£3,000

Interest rate5.4%

Loan to value75%

Cash required: £253,800
Net cash flow: -£593/mo
Cash on cash: -2.8%
Score at this price: 13

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.11 - 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 100080340686Valuation edge · as of 9 Oct 2026
valuation_snapshotsrent estimate 2800/mo (range 2600-3000)Rental economics · as of 9 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 6 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 6 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 2800/mo (range 2600-3000)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 96 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. 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£531,000

Rent Estimate (pcm)£2,800

Gross Yield4.48%

1y Growth-4.1%

3y Growth+2.3%

5y Growth+2.9%

10y Growth+3.9%

Last Sold Price£250,000 (2004-12-22)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningModerate
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

0SL1 2AD

Approval Rate

-12mo

Development

low

P/20897/002
Retrospective application for retention of the existing garage window.
Pending
P/01711/005
Construction of a single storey front extension
Pending
P/08339/005
Lawful Development Certificate for existing open sided canopy
Pending

View Planning Timeline