9a, Firs Walk, Tewin, Welwyn, AL6 0NY
About 9a
9a is a detached house in Tewin, Welwyn, Welwyn (AL6 0NY). It has a recorded floor area of 221 m² (around 2379 sq ft), construction records dating it to 1930-1949 and council tax band G. The latest certificate (May 2013) shows a C (score 75), near the top of the C band. When first surveyed in June 2012 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Good to Very Good; while window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 88). The latest certificate is from May 2013, so improvements made since then won't be reflected.
One planning record on file: a garage conversion approved in 2020. Past consents include a garage conversion, meaningful when judging how the property has evolved.
Know exactly what you're buying at 9a
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
9a's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 31 May 2023
EPC Rating
Property Improvements
Changes detected from historical EPC data
Hot water efficiency improved
Solar PV panels (37 kWp) installed
Planning history
- Feb 2020Garage ConversionFullIn report
Conversion of garage to provide wheelchair accessible bedroom and shower room; provision of external ramp; alterations to fenestration.
- Documents
- 17 docs on file
- Reference
- 3/19/2516/HH
We flagged 1 thing worth checking at 9a
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
9a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£1,252,000
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 0NY: £1,300,000 (2025–2020).
Nearby sales in AL6 0NY
Everything we know about 9a, 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 Firs Walk homes
9a outperforms the street on co₂ emissions by a wide margin.
EPC Rating
75 (C)
Street avg 62 (D)
Floor Area
221 m²
Street avg 241 m²
CO₂ Emissions
4.9 t/year
Street avg 8.5 t/year
Habitable Rooms
7 rooms
Street avg 8 rooms
Similar properties nearby
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.7 km
Desborough Drive — bus stop.
Closest school
1.9 km
Tewin Cowper Church of England Voluntary Aided Primary School. 7 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.