Flat 29, St Peters House, Castle Street, Northampton, NN1 2SH

UPRN:15056080Flat/Maisonette2 bedsBuilt 1950-1966

LeaseholdCouncil Tax: -EPC: C (78)

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

Flat 29, St Peters House, Castle Street, Northampton, NN1 2SH

HP Score

/ 100

Mixed

Verdict

today

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

Evidence

19 of 21 sources

Sale Estimate

£114,000

£109k - £120kHigh

Estimate

£114k

Range

£109k – £120k

Rent Estimate (pcm)

£550

£550 - £600

Monthly

£550

Yield

5.50%

Verdict

Derived from HomePortfolio scores

Flat 29 earns an INVESTIGATE rating with HP Score 60/100. Investment score 70/100 reflects strong fundamentals. Crime intensity is elevated. Walkability is excellent (92/100). 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 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

60/ 100

Mixed

Investment Score

70/ 100

High

100

Crime Score

100/ 100

Elevated

Walkability

92/ 100

Excellent

Transit & Bike

Transit 45Bike 74

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence1 independent sourceListing checked 4 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 -5.3% (HIGH), sold-comps -11.1%, £/sqft -10.9%] → 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 13 Oct 2026
- valuation_snapshotsestimate for 15056080· as of 13 Oct 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 23.8%· as of 29 Oct 2026
Rental economics17.2/40
gross yield 7.1% on contractual rent (listing-disclosed tenancy); contractual 950/mo far above the 550/mo estimate - credited at the 1.3x cap, verify
- listing_factscontractual rent 950/mo (tenanted)· as of 4 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -133/mo, -19% of rent (6.75% on a 75% loan; disclosed service charge and ground rent); fails the stress - earns nothing
- listing_factsservice charge / ground rent from the advert· as of 4 Nov 2026
Seller motivationNot scored
context, not scored: 10 price cut(s), 167 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 4 Nov 2026
Risk & liquidity14.7/15
342 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

£90,000£138,000

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£120,000

At the asking price

Monthly rent£550/mo

Evidenced range £550-£600

Interest rate5.4%

Loan to value75%

Cash required: £37,300
Net cash flow: -£24/mo
Cash on cash: -0.8%
Score at this price: 32

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.

Evidence

Where every number comes from

valuation_snapshotsestimate for 15056080Valuation edge · as of 13 Oct 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 23.8%Valuation edge · as of 29 Oct 2026
listing_factscontractual rent 950/mo (tenanted)Rental economics · as of 4 Nov 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · as of 4 Nov 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 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
contractual rent 950/mo (tenanted)
Seller motivation could not be scored
context, not scored: 10 price cut(s), 167 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. Ask the agent why the price was reduced and whether a previous sale fell through.
10 price cut(s) recorded on the listing history.
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£114,000

Rent Estimate (pcm)£550

Gross Yield5.50%

1y Growth-

3y Growth-0.1%

5y Growth+0.7%

10y Growth+3.2%

Last Sold Price£100,000 (2016-03-24)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonModerate
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0NN1 2SH

Approval Rate

-12mo

Development

low

2026/4417/TCA
Works to Sycamore tree within a conservation area
Pending
2026/4240/COND
Discharge of Condition 3 [Window Construction & Details] of Planning Permission 2025/4772/LBC [Internal refurbishment works to provide additional Toilets / Multi Use Offices / Re-Planning of Staff Facilities. New window to Office Space. External heating and cooling equipment / drainage pipes to elevations and ventilation grills]
Pending
2026/4070/TCA
Removal of 12m Copper Norway Maple Tree
Pending

View Planning Timeline

Ownership

Corporate Ownership65.4%
Overseas OwnershipNo
Lease Term Remaining85 yrs
CovenantsNone
Lease TypeLeasehold
Last Ownership Change2016-03-24
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

16 Mbps

Mobile 4G/5G Coverage

EEThreeO2Vodafone

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£33,059

Population Density1,365 /km²

Owner Occupied9%

Age Distribution

0-15 20%16-64 74%65+ 6%

View Area Profile

Schools Nearby

Spring Lane Primary School
0.1 mi
GoodConcerns
New Horizons Academy
0.3 mi
Inspected as The Spires Academy (URN 142926) on 14 Nov 2023
Castle Academy
0.4 mi
Report card2026
Ofsted no longer awards a single overall grade.
Northampton International Academy
0.5 mi
Area grades2024
Inspected after Ofsted withdrew the single overall grade.

1 of 6 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

St Peters House Castle Street
-
£128k
-
St Peters House Castle Street
-
£120k
-
St Peters House Castle Street
-
£113k
-
St Peters House Castle Street
-
£125k
-

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