11 Robert Ellis Court, St Martins Road, Knebworth, SG3 6EL

UPRN:10070034779Flat/Maisonette2 bedsBuilt 2007-2011

LeaseholdCouncil Tax: Band EEPC: C (79)

Data freshness:Listing· freshPrice Paid· freshPlanning· 4mo agoEPC· 6mo agoRisk· 5mo agoConnectivity· 1mo agoSchools· 1mo agoAmenities· 2mo agoArea· Census 2021

11 Robert Ellis Court, St Martins Road, Knebworth, SG3 6EL

HP Score

/ 100

Strong

Verdict

yesterday

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

Evidence

18 of 21 sources

Sale Estimate

£329,000

£312k - £345kHigh

Estimate

£329k

Range

£312k – £345k

Rent Estimate (pcm)

£2,150

£2k - £2k

Monthly

£2,150

Yield

8.60%

Verdict

Derived from HomePortfolio scores

11 Robert Ellis Court earns an INVESTIGATE rating with HP Score 78/100. Investment score 73/100 reflects strong fundamentals. Crime intensity is low. Walkability is limited (57/100). 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 NationsMarket 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 leasesHM Land Registry Price PaidPlanIt / council planning portalsOverture Maps PlacesOfsted / DfE GIAS

HP Score

78/ 100

Strong

Investment Score

73/ 100

High

Crime Score

20/ 100

Moderate

Walkability

57/ 100

Moderate

Transit & Bike

Transit 9Bike 43

Walk Score, out of 100

Opportunity

Why this could be an opportunity

Low confidence1 independent sourceLead to verifyListing checked 4 Nov 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: leasehold with no service charge disclosed - the stress test assumes GBP 0. It ranks after every home whose inputs are verified.

Valuation edge0/15
claims [AVM +8.8% (HIGH)] → 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 10070034779· as of 13 Oct 2026
Rental economics27.9/40
gross yield 8.6%; range width penalty ×0.97
- valuation_snapshotsrent estimate 2150/mo (range 2050-2300)· as of 13 Oct 2026· verify before relying on this
Stress margin8.6/30
stressed cash flow +185/mo, +9% of rent (6.75% on a 75% loan; no service charge or ground rent disclosed); passes the stress; leasehold with no service charge disclosed - the stress assumes GBP 0
- underwriting_assumptionscosts not disclosed by the advert· as of 4 Nov 2026· verify before relying on this
Seller motivationNot scored
context, not scored: 4 price cut(s), unknown 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 & liquidity14.6/15
84 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 sensitivityScores 70+ up to £255,000

£225,000£345,000

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£300,000

At the asking price

Monthly rent£2,150/mo

Evidenced range £2,050-£2,300

Interest rate5.4%

Loan to value75%

Cash required: £96,300
Net cash flow: £476/mo
Cash on cash: 5.9%
Score at this price: 51

After a 8% void allowance, 15% management and 10% maintenance. Lender coverage (rent ÷ interest): 2.12 - 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 10070034779Valuation edge · as of 13 Oct 2026
valuation_snapshotsrent estimate 2150/mo (range 2050-2300)Rental economics · as of 13 Oct 2026 · verify before relying on this
underwriting_assumptionscosts not disclosed by the advertStress margin · as of 4 Nov 2026 · verify before relying on this
portal_listingsprice_changes + first_published_dateSeller motivation · as of 4 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 2150/mo (range 2050-2300)
Stress margin needs verification before you rely on it
costs not disclosed by the advert

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.
4 price cut(s) recorded on the listing history.
3. Set your walk-away price before viewing - above £255,000 the deal stops scoring well.
Computed by re-running the score at higher prices.
4. Treat the gap to the estimate as unproven - compare recent sold prices on the street yourself before pricing an offer around it.
On later completions, homes listed below their estimate sold at the same share of the asking price as the rest.

Valuation & Market

Sale Estimate£329,000

Rent Estimate (pcm)£2,150

Gross Yield8.60%

1y Growth-

3y Growth+2.0%

5y Growth-0.5%

10y Growth+1.8%

Last Sold Price£300,000 (2009-09-25)

View Market Details

Risk Overview

Flood RiskUnknown
SubsidenceModerate
RadonLow
MiningLow
LandslideLow
Air QualityLow
NoiseLow

View Full Risk Report

Planning Activity

Recent Apps

0SG3 6EL

Approval Rate

-12mo

Development

low

26/02638/TCA
T1: Eucalyptus - Fell
Pending
26/02350/FPH
Two storey side extension following demolition of existing porch. Insertion of front and rear dormer windows to facilitate conversion of loft space to habitable accommodation. Alterations to fenestration and external cladding.
Pending
26/02625/DOC
Details reserved by Condition 6 (Construction Method Statement) of Outline Planning permission reference 23/02946/OP granted on 18.06.2025.
Pending

View Planning Timeline

Ownership

Corporate Ownership56.9%
Overseas OwnershipNo
Lease Term Remaining106 yrs
CovenantsRestrictive
Lease TypeLeasehold
Last Ownership Change2009-09-25
SourceLand Registry

View Ownership Details

Connectivity

Broadband (Standard)

19 Mbps

Mobile 4G/5G Coverage

EV Charger

PTAL Rating

View Connectivity Map

Area Profile

Median EarningsLocal authority£42,703

Population Density1,793 /km²

Owner Occupied69%

Age Distribution

0-15 18%16-64 62%65+ 20%

View Area Profile

Schools Nearby

Knebworth Primary and Nursery School
0.2 mi
Good
All Saints Church of England Voluntary Aided Primary School, Datchworth
1.1 mi
Good
St Michael's Woolmer Green CofE VA Primary School
1.1 mi
Good
Shephalbury Park Primary School
1.2 mi
Good

2 of 11 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.

View All Schools

Comparables

View All

Robert Ellis Court St Martins Road
-
£415k
-
Robert Ellis Court St Martins Road
-
£300k
-
Robert Ellis Court St Martins Road
-
£395k
-
Robert Ellis Court St Martins Road
-
£420k
-

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