1a, Chestnut Walk, Welwyn, AL6 0SB
About 1a
1a is a four-bedroom detached house in Welwyn (AL6 0SB). It has a recorded floor area of 214 m² (around 2303 sq ft), construction records dating it to 1967-1975 and council tax band G. The latest certificate (October 2014) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 73). The latest certificate is from October 2014, so improvements made since then won't be reflected.
At 214 m² the property is well over the postcode median (163 m² across 12 EPCs), placing it in the larger end of the local stock. Last sale on file: £750,000 in December 2018. Across the public record there are 4 sales, relatively high churn for a single property. 2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 2000–2018, sale prices on this property compounded at 6.3% per year. Today's modelled estimate of £857,000 is 14.3% above the 2018 sale price.
Know exactly what you're buying at 1a
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
What this property has
Inside
- Bedrooms4
- Bathrooms2
Energy performance
1a's carbon output runs well above what efficient homes in the postcode produce.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 08 Oct 2024
EPC Rating
Planning history
1a has an approved single-storey side extension on the planning record.
- Dec 2001ExtensionFullIn report
Extension: Single storey · Side of property
SINGLE STOREY SIDE EXTENSIONS INCORPORATING ADDITIONAL HABITABLE ACCOMMODATION TO ROOF AND REAR DORMER WINDOWS. (AMENDMENTS TO PLANNING PERMISSION N6/2001/0606/FP)
- Reference
- N6/2001/1392/FP
- Jun 2001ExtensionFullIn report
Extension: Single storey · Side of property
SINGLE STOREY SIDE EXTENSIONS INCORPORATING ADDITIONAL HABITABLE ACCOMMODATION TO ROOF AND FRONT AND REAR DORMER WINDOWS
- Reference
- N6/2001/0606/FP
We flagged 1 thing worth checking at 1a
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
1a has more than tripled in price since its earliest registered sale in 2000.
£857,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.3% per year over 18 years.
£750,000
Growth on file: 6.3% per year over 18 years.
Sales timeline
10 December 2018Most recent
£750,000
+7.1%over 3 years17 February 2015
£700,000
+12.0%over 7 years30 September 2007
£625,000
+150.0%over 6 years10 November 2000
£250,000
Median price across the last 5 sales in AL6 0SB: £645,000 (2025–2016).
Nearby sales in AL6 0SB
Everything we know about 1a, 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 Chestnut Walk homes
Floor Area for 1a runs comfortably ahead of the street norm.
Price per m²
£3,505
Street avg £4,501
Floor Area
214 m²
Street avg 166 m²
Habitable Rooms
10 rooms
Street avg 8 rooms
CO₂ Emissions
7.2 t/year
Street avg 6.0 t/year
Similar properties nearby
The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.4 km
Mardley Avenue — bus stop.
Closest school
0.6 km
Oaklands 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.