21 Thirlmere, Stevenage, SG1 6AQ
UPRN:10013377340Detached House4 bedsBuilt 1996-2002
FreeholdCouncil Tax: Band FEPC: C (72)
Data freshness:Price Paid· freshPrice Paid: fresh, refreshed 3d ago (2026-11-01T07:51:53.734816+00:00)Planning· 4mo agoPlanning: stale, refreshed 4mo ago (2026-07-10T08:48:43.009682+00:00)EPC· 4mo agoEPC: stale, refreshed 4mo ago (2026-07-01T02:04:50.057738+00:00)Risk· 5mo agoRisk: stale, refreshed 5mo ago (2026-06-18T00:00:00+00:00)Connectivity· 1mo agoConnectivity: ageing, refreshed 1mo ago (2026-10-03T06:43:10.905825+00:00)Amenities· 1mo agoAmenities: ageing, refreshed 1mo ago (2026-09-23T00:00:00+00:00)Area· Census 2021Area: static reference data (Census 2021); authoritative and does not refresh
HP Score
76
/ 100
Strong
Verdict
3 days ago
- Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Strong fundamentals; flood risk not assessed
Evidence
19 of 21 sourcesSale Estimate
£595,000
£566k - £625kHigh
Estimate
£595k
Range
£566k – £625k
Rent Estimate (pcm)
£2,500
£2k - £3k
Monthly
£2,500
Yield
5.04%
Verdict
Derived from HomePortfolio scores
21 Thirlmere earns an INVESTIGATE rating with HP Score 76/100. Investment score 65/100 reflects moderate fundamentals. Crime intensity is very low. Walkability is limited (44/100). 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
76
HP Score
76/ 100
Strong
65
Investment Score
65/ 100
Moderate
8
Crime Score
8/ 100
Low
44
Walkability
44/ 100
Mixed
Transit & Bike
Transit 11Bike 49
Walk Score, out of 100
Valuation & Market
Sale Estimate£595,000
Rent Estimate (pcm)£2,500
Gross Yield5.04%
1y Growth-
3y Growth+1.5%
5y Growth+2.7%
10y Growth+3.7%
Last Sold Price£290,000 (2006-12-15)
Risk Overview
- Flood RiskUnknown
- SubsidenceModerate
- RadonLow
- MiningSignificant
- LandslideLow
- Air QualityLow
- NoiseLow
Planning Activity
Recent Apps
0SG1 6AQ
Approval Rate
-12mo
Development
low
- Pending26/00765/FPInstallation of micro battery storage facility
- Pending26/02618/LDCPSingle storey rear extension, replace existing garage door with a window to facilitate conversion into habitable accommodation and erection of front porch canopy following demolition of existing rear conservatory. Installation of rear flue.
- Pending26/02619/FPHReplacement of the existing rear patio, levelling rear garden beyond patio area with associated retaining walls and steps, erection of a timber gazebo, associated landscaping works, together with proposed alterations to boundary fencing (development already commenced).
Ownership
- Corporate Ownership50.4%
- Overseas OwnershipNo
- Lease Term Remaining-
- CovenantsRestrictive
- Lease TypeFreehold
- Last Ownership Change2006-12-15
- SourceLand Registry
Connectivity
Broadband (Standard)
19 Mbps
Mobile 4G/5G Coverage
EEThreeO2Vodafone
EV Charger
-
PTAL Rating
-
Area Profile
Median EarningsLocal authority£42,703
Population Density4,239 /km²
Owner Occupied91%
Age Distribution
0-15 22%16-64 69%65+ 9%
Schools Nearby
- -Round Diamond Primary School0.5 mi
- Martins Wood Primary School0.5 miReport card2025
Ofsted no longer awards a single overall grade.
- The Leys Primary and Nursery School0.7 miGood
- The Giles Infant and Nursery School0.8 miGoodImproving
2 of 11 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.
Comparables
- 65 Thirlmere-£370k-
- 71 Thirlmere-£440k-
- 27 Thirlmere-£673k-
- 3 Thirlmere-£560k-