311 Mutton Lane, Potters Bar, EN6 2AY

UPRN:10013033170Semi-Detached House2 bedsBuilt 1930-1949

FreeholdCouncil Tax: Band EEPC: C (70)

Data freshness:Listing· freshPrice Paid· freshEPC· 1mo agoRisk· 5mo agoConnectivity· 1mo agoAmenities· 1mo agoArea· Census 2021

HP Score

/ 100

Mixed

Verdict

3 days ago

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

Evidence

18 of 21 sources

Sale Estimate

£610,000

£549k - £671kMedium

Estimate

£610k

Range

£549k – £671k

Rent Estimate (pcm)

£2,150

£2k - £2k

Monthly

£2,150

Yield

3.31%

Verdict

Derived from HomePortfolio scores

311 Mutton Lane earns an INVESTIGATE rating with HP Score 68/100. Investment score 53/100 reflects moderate fundamentals. Crime intensity is moderate. Walkability is limited (66/100). 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

68/ 100

Mixed

Investment Score

53/ 100

Moderate

Crime Score

39/ 100

Elevated

Walkability

66/ 100

Moderate

Transit & Bike

Transit 22Bike 55

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence0 independent sourcesLead to verifyListing checked 30 Oct 2026

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

Check before relying on this score: the advert has 4 bedrooms but the valuation snapshot describes 2 - an extension, conversion or HMO the evidence does not reflect, or a different home. It ranks after every home whose inputs are verified.

Valuation edge-0.6/15
claims [AVM -27.9% (MEDIUM)] → measured edge -0.12pp 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 (MEDIUM confidence) · snapshot 9 Oct 2026
- valuation_snapshotsestimate for 10013033170· as of 9 Oct 2026
Rental economics0/40
gross yield 3.3%; range width penalty ×0.78
- valuation_snapshotsrent estimate 2150/mo (range 1900-2350)· as of 9 Oct 2026· verify before relying on this
Stress margin0/30
stressed cash flow -1,840/mo, -86% 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 30 Oct 2026
Seller motivationNot scored
context, not scored: 0 price cut(s), 76 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 30 Oct 2026
Risk & liquidity12.8/15
258 sales/12mo in area; valuation range width 20%
- 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

£585,000£897,000

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£780,000

At the asking price

Monthly rent£2,150/mo

Evidenced range £1,900-£2,350

Interest rate5.4%

Loan to value75%

Cash required: £264,300
Net cash flow: -£1,144/mo
Cash on cash: -5.2%
Score at this price: 12

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 0.82 - 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 10013033170Valuation edge · as of 9 Oct 2026
valuation_snapshotsrent estimate 2150/mo (range 1900-2350)Rental economics · as of 9 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 30 Oct 2026
portal_listingsprice_changes + first_published_dateSeller motivation · as of 30 Oct 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 2150/mo (range 1900-2350)
Seller motivation could not be scored
context, not scored: 0 price cut(s), 76 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£610,000

Rent Estimate (pcm)£2,150

Gross Yield3.31%

1y Growth-

3y Growth+0.0%

5y Growth+0.7%

10y Growth+2.7%

Last Sold Price£280,000 (2010-09-24)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceSignificant
RadonLow
MiningModerate
LandslideLow
Air QualityLow
NoiseModerate

View Full Risk Report

Planning Activity

Recent Apps

4EN6 2AY

Approval Rate

-12mo

Development

low

26/1543/HSE
Two storey side and part single part two storey rear extensions.
Pending
26/1536/CLP
Single storey rear extension. Certificate of lawful development (Proposed).
Pending
26/1531/VOC
Variation of condition 2 (plans) to allow for roof alterations, alterations to the garden openings and replace the render finish with a cladding finish following grant of planning permission 21/2038/HSE.
Pending

View Planning Timeline