Iona Barn, Carthovel Lane, Grendon Underwood, Aylesbury, HP18 0EW
UPRN:766334165Detached House5 bedsBuilt 2007-2011
FreeholdCouncil Tax: Band GEPC: E (44)
Data freshness:Listing· 4mo agoListing: stale, refreshed 4mo ago (2026-07-16T04:00:03.725784+00:00)Price Paid· freshPrice Paid: fresh, refreshed 4d ago (2026-11-01T14:28:53.688334+00:00)Planning· 4mo agoPlanning: stale, refreshed 4mo ago (2026-07-10T08:05:55.904932+00:00)EPC· 6mo agoEPC: stale, refreshed 6mo ago (2026-05-20T10:58:39.129138+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)Schools· 4mo agoSchools: stale, refreshed 4mo ago (2026-07-07T09:14:45.605452+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
64
/ 100
Mixed
Verdict
today
- Verdict: INVESTIGATE, on a scale of Buy, Investigate, Avoid.
Mixed signals - investigate
Evidence
18 of 21 sourcesSale Estimate
£990,000
£941k - £1.04MHigh
Estimate
£990k
Range
£941k – £1.04M
Rent Estimate (pcm)
£3,650
£3k - £4k
Monthly
£3,650
Yield
4.42%
Verdict
Derived from HomePortfolio scores
Iona Barn earns an INVESTIGATE rating with HP Score 64/100. Investment score 56/100 reflects moderate fundamentals. Crime intensity is very low. Walkability is limited (20/100). 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
64
HP Score
64/ 100
Mixed
56
Investment Score
56/ 100
Moderate
11
Crime Score
11/ 100
Low
20
Walkability
20/ 100
Low
Transit & Bike
Transit 8Bike 18
Walk Score, out of 100
Valuation & Market
Sale Estimate£990,000
Rent Estimate (pcm)£3,650
Gross Yield4.42%
1y Growth-
3y Growth+0.8%
5y Growth+1.4%
10y Growth+2.5%
Last Sold Price£320,000 (2008-05-16)
Risk Overview
- Flood RiskUnknown
- SubsidenceSignificant
- RadonLow
- MiningUnknown
- LandslideSignificant
- Air QualityLow
- NoiseLow
Planning Activity
Recent Apps
0HP18 0EW
Approval Rate
-12mo
Development
low
- PendingPL/26/08252/KARepollarding by approximately 4m to previous pollard points of the established pollard framework of Willow
- PendingPL/26/08276/FAChange of use of an agricultural building to a vehicle sales showroom with associated indoor vehicle storage and valeting (sui generis) (Retrospective).
- PendingPL/26/08253/KACrown reduction by 1.5m of Oak
Ownership
- Corporate Ownership72.3%
- Overseas OwnershipNo
- Lease Term Remaining-
- CovenantsRestrictive
- Lease TypeFreehold
- Last Ownership Change2008-05-16
- SourceLand Registry
Connectivity
Broadband (Standard)
16 Mbps
Mobile 4G/5G Coverage
EEThreeO2Vodafone
EV Charger
-
PTAL Rating
-
Area Profile
Median EarningsLocal authority£35,937
Population Density-
Owner Occupied80%
Age Distribution
0-15 18%16-64 63%65+ 19%
Schools Nearby
- Grendon Underwood School0.1 mi
Inspected as Grendon Underwood Combined School (URN 110278) on 1 Feb 2024
- Marsh Gibbon CofE Primary School2.4 miArea grades2025
Inspected after Ofsted withdrew the single overall grade.
- Twyford C of E School3.7 miGood
- Quainton Church of England School4.0 miGood
2 of 14 nearby schools with published figures were oversubscribed in 2026 - demand, not a catchment.
Comparables
- Cartref Barn Carthovel Lane-£775k-
- Adastral House Carthovel Lane-£250k-
- Iona Barn Carthovel Lane-£320k-
- Cartref Barn Carthovel Lane-£275k-