Flat 12A, 30 Mariner Avenue, Birmingham, B16 9DL

UPRN:100071287504Purpose Built Flat3 bedsBuilt 1991-1995

LeaseholdCouncil Tax: Band CEPC: D (65)

Data freshness:Listing· freshPlanning· 4mo agoOwnership· freshEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021Council Tax· 4mo ago

Flat 12A, 30 Mariner Avenue, Birmingham, B16 9DL

HP Score

/ 100

Mixed

Verdict

3 days ago

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

Evidence

19 of 21 sources

Sale Estimate

£147,000

£140k - £155kHigh

Estimate

£147k

Range

£140k – £155k

Rent Estimate (pcm)

£750

£700 - £800

Monthly

£750

Yield

5.62%

Verdict

Derived from HomePortfolio scores

Flat 12A earns an INVESTIGATE rating with HP Score 70/100. Investment score 68/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is limited (55/100). 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)Defra 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

70/ 100

Mixed

Investment Score

68/ 100

Moderate

Crime Score

41/ 100

Elevated

Walkability

55/ 100

Moderate

Transit & Bike

Transit 61Bike 56

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesListing checked 3 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 -8.8% (HIGH), sold-comps -16.8%, £/sqft -16.6%] → 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 9 Nov 2026
- valuation_snapshotsestimate for 100071287504· as of 9 Nov 2026
- property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 24.7%· as of 24 Oct 2026
Rental economics4.7/40
gross yield 5.6%; range width penalty ×0.93
- valuation_snapshotsrent estimate 750/mo (range 700-800)· as of 9 Nov 2026· verify before relying on this
Stress margin0/30
stressed cash flow -355/mo, -47% 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 3 Nov 2026
Seller motivationNot scored
no listing-history inputs (first published date, price changes)
Risk & liquidity14.6/15
148 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

£120,000£184,000

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£160,000

At the asking price

Monthly rent£750/mo

Evidenced range £700-£800

Interest rate5.4%

Loan to value75%

Cash required: £50,000
Net cash flow: -£21/mo
Cash on cash: -0.5%
Score at this price: 19

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 1.39 - 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 100071287504Valuation edge · as of 9 Nov 2026
property_comparablessold-evidence family (implied value + £/sqft): 12 comps, dispersion 24.7%Valuation edge · as of 24 Oct 2026
valuation_snapshotsrent estimate 750/mo (range 700-800)Rental economics · as of 9 Nov 2026 · verify before relying on this
listing_factsservice charge / ground rent from the advertStress margin · 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 750/mo (range 700-800)
Seller motivation could not be scored
no listing-history inputs (first published date, price changes)

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

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£147,000

Rent Estimate (pcm)£750

Gross Yield5.62%

1y Growth+35.6%

3y Growth+3.3%

5y Growth+0.2%

10y Growth+5.8%

Last Sold Price-

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceLow
RadonLow
MiningUnknown
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0B16 9DL

Approval Rate

-12mo

Development

low

2026/05967/PA
Installation of external render to front and rear
Pending
2026/05821/PA
Application for a Lawful Development Certificate for the existing use as 5no. self contained flats
Pending
2026/05783/PA
Erection of single storey rear extension
Pending

View Planning Timeline

Ownership

Corporate Ownership57.7%
Overseas OwnershipNo
Lease Term Remaining65 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change-
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£30,180

Population Density5,483 /km²

Owner Occupied29%

Age Distribution

0-15 10%16-64 82%65+ 8%

View Area Profile

Schools Nearby

St Paul's School for Girls
0.1 mi
Outstanding
Blessed Dominic Barberi Catholic Primary School
0.4 mi
Inspected as The Oratory Roman Catholic Primary School (URN 103427) on 30 Nov 2022
St George's Church of England Primary School
0.5 mi
Report card2026
Ofsted no longer awards a single overall grade.
Norfolk House School
0.5 mi
Inspected by ISI

3 of 9 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

30 Mariner Avenue
-
£95k
-
30 Mariner Avenue
-
£183k
-
30 Mariner Avenue
-
£135k
-
30 Mariner Avenue
-
£120k
-

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