10 Grass Warren, Tewin, Welwyn, AL6 0JJ
About 10 Grass Warren
10 Grass Warren is a mid-terrace house in Tewin, Welwyn, Welwyn (AL6 0JJ). It has a recorded floor area of 29 m² (around 314 sq ft), construction records dating it to 1950-1966 and council tax band C. The latest certificate (February 2012) shows a C (score 71). The rating has held steady at C across 2 certificates since February 2009. The latest certificate is from February 2012, so improvements made since then won't be reflected.
At 29 m² it sits well below the postcode median (79 m² across 22 EPCs), making it one of the more compact homes locally.
Know exactly what you're buying at 10 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
10 Grass Warren's carbon output is low for the local stock.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 14 Feb 2022
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Loft insulation upgraded to recommended levels
Planning history
10 Grass Warren has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
We flagged 1 thing worth checking at 10 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
10 Grass Warren has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£268,000
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.
Median price across the last 5 sales in AL6 0JJ: £300,000 (2022–2005).
Nearby sales in AL6 0JJ
Everything we know about 10 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

Versus other Grass Warren homes
Floor Area for 10 Grass Warren lags the street by a wide margin.
EPC Rating
71 (C)
Street avg 71 (C)
Floor Area
29 m²
Street avg 76 m²
CO₂ Emissions
1.3 t/year
Street avg 2.6 t/year
Habitable Rooms
2 rooms
Street avg 3 rooms
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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.