11 Grass Warren, Tewin, Welwyn, AL6 0JJ
About 11 Grass Warren
11 Grass Warren is a property in Tewin, Welwyn, Welwyn (AL6 0JJ). It has council tax band C.
Untraded for 23 years, with the last transfer in July 2003. One planning record on file: an extension approved in 2004. Past consents include an extension, meaningful when judging how the property has evolved.
Know exactly what you're buying at 11 Grass Warren
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
No EPC on record
This property doesn't have an Energy Performance Certificate yet. An EPC is required to sell or let — and unlocks our automated valuation.
Planning history
11 Grass Warren has an approved single-storey rear extension on the planning record.
- Jan 2004ExtensionFullIn report
Extension: Single storey · Rear of property
Single storey rear extension
- Reference
- 3/03/2312/FP
We flagged 1 thing worth checking at 11 Grass Warren
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
30-day money-back guarantee
Sales history & valuation
Latest sale on 11 Grass Warren was the lowest on Land Registry record across the postcode.
£73,000
Recorded with HM Land Registry.
Sales timeline
13 July 2003Most recent
£73,000
Median price across the last 5 sales in AL6 0JJ: £300,000 (2022–2005).
Nearby sales in AL6 0JJ
Everything we know about 11 Grass Warren, 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
Grasswarren Estate — bus stop.
Closest school
0.2 km
Tewin Cowper Church of England Voluntary Aided Primary School. 10 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.