The Old Hay Barn, Back Lane, Tewin, Welwyn, AL6 0LS
About The Old Hay Barn
The Old Hay Barn is a detached house in Tewin, Welwyn, Welwyn (AL6 0LS). It has a recorded floor area of 158 m² (around 1701 sq ft), construction records dating it to 2007-2011 and council tax band G. The latest certificate (November 2023) shows a C (score 78), near the top of the C band. The rating has held steady at C across 2 certificates since June 2022. The recommended improvements would push it to B (score 84).
10 planning records sit against the property, 6 approved, 1 refused. Past consents include subdivision, an extension, an annexe and partial demolition, meaningful when judging how the property has evolved.
Know exactly what you're buying at The Old Hay Barn
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Wall insulation upgraded
More low energy lighting installed
Planning history
A recent planning application at The Old Hay Barn was refused — worth checking the council file.
- Mar 2024ConditionsIn report
Discharge condition 5 (boundary walls, fences, means of enclosure)) attached to 3/23/0905/FUL. (Change / alteration to what was discharged for condition 5 under X/23/0262/CND)
- Documents
- 5 docs on file
- Reference
- X/24/0073/CND
- Jul 2023ConditionsIn report
Discharge conditions 5 (boundary walls, fences, means of enclosure), 6 (electric vehicle charging point), 8 (water efficiency), 9 (landscaping) and 11 (bin storage) attached to 3/23/0905/FUL.
- Documents
- 6 docs on file
- Reference
- X/23/0262/CND
We flagged 1 thing worth checking at The Old Hay Barn
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
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Sales history & valuation
The Old Hay Barn has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£832,000
Modelled from EPC, postcode comparables.
No sales recorded with HM Land Registry
That can mean the property has never traded since the registry began publishing in 1995, was a new build that hasn't been registered yet, or is held in the same hands long-term.
Everything we know about The Old Hay Barn, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby

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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Rose and Crown PH — bus stop.
Closest school
0.3 km
Tewin Cowper Church of England Voluntary Aided Primary School. 9 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.