40a, Flat 4, High Street, Welwyn, AL6 9EQ
About 40a
40a is an end-of-terrace house in Welwyn (AL6 9EQ). It has a recorded floor area of 47 m² (around 506 sq ft) and construction records dating it to 2012 onwards. At 47 m² this is the smallest unit on EPC record across 40a (47–88 m²). The building's EPC ratings span D to B across 5 units on file. The latest certificate (April 2025) shows a C (score 80), near the top of the C band. The rating has held steady at C across 2 certificates since January 2016. Between certificates, wall efficiency went from Good to Very Good.
At 47 m² it's 27.1% smaller than the typical home in the postcode (65 m² median across 12 EPCs).
Know exactly what you're buying at 40a
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
40a's carbon output is low for the local stock.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Wall insulation upgraded
Loft insulation upgraded to recommended levels
Planning history
40a has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
40a has no Land Registry sales on file, suggesting it has stayed in the same hands since registration began.
£232,000
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 9EQ: £390,000 (2023–2011).
Everything we know about 40a, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?
Versus other High Street homes
40a is notably below the street on floor area.
EPC Rating
80 (C)
Street avg 64 (D)
Floor Area
47 m²
Street avg 71 m²
CO₂ Emissions
1.1 t/year
Street avg 3.4 t/year
Habitable Rooms
3 rooms
Street avg 3 rooms
Similar properties nearby
40a, Flat 5, High Street
AL6 9EQ
Swan Field Court, Flat 1, School Lane
AL6 9HN
Civic Centre, Caretakers Flat, Prospect Place
AL6 9ER
40a, Flat 2, High Street
AL6 9EQ
40a, Flat 3, High Street
AL6 9EQ
Flat 4, 29 Mill Lane
AL6 9EU
Flat 1, 8 Wendover Lodge, Church Street
AL6 9LR
Flat 14, 8 Wendover Lodge, Church Street
AL6 9LR
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
St Mary's Church — bus stop.
Closest school
0.4 km
Welwyn St Mary's Church of England Voluntary Aided Primary School. 8 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.