11a, Chestnut Walk, Welwyn, AL6 0SB
About 11a
11a is a four-bedroom detached house in Welwyn (AL6 0SB). It has a recorded floor area of 120 m² (around 1293 sq ft), construction records dating it to 1930-1949 and council tax band G. The latest certificate (June 2010) shows a D (score 58), a step below the typical UK home. The latest certificate is from June 2010, so improvements made since then won't be reflected.
Across 1996–2012, sale prices on this property compounded at 7.5% per year. Today's modelled estimate of £767,000 sits 50.4% above the 2012 sale of £510,000. On a £-per-square-foot basis, the last sale (£395/sq ft) was about 37.2% above the typical sold price in the postcode. 14 years since the last transfer (September 2012). Across the public record there are 4 sales, relatively high churn for a single property. 6 planning records sit against the property, 2 approved, 4 refused. Past consents include an extension and a porch, meaningful when judging how the property has evolved. At 120 m² it's 29.8% smaller than the typical home in the postcode (171 m² median across 12 EPCs).
Know exactly what you're buying at 11a
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
- Dining roomYes
- CloakroomYes
- StudyYes
- FireplaceYes
Outside
- GarageYes
Energy performance
11a'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This certificate is over 10 years old and is no longer valid.Expired 03 Jun 2020
EPC Rating
Planning history
A recent planning application at 11a was refused — worth checking the council file.
- Mar 2023ExtensionFullIn report
Extension: Rear of property
Erection of new rear dormer extension as continuation of existing rear dormer
- Reference
- 6/2023/0170/HOUSE
- Nov 2022Loft ConversionFullIn report
Alterations to the existing roof to include a rear dormer, extending part of the existing hipped roof to form a gable and new front rooflight.
Extension- Reference
- 6/2022/2116/HOUSE
We flagged 2 things worth checking at 11a
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
- A planning decision worth checking
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Sales history & valuation
Sale price has grown by over 3x since 1996.
£767,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.5% per year over 16 years.
£510,000
Growth on file: 7.5% per year over 16 years.
Sales timeline
5 September 2012Most recent
£510,000
+5.2%over 5 years24 November 2006
£485,000
+104.6%over 7 years13 July 1999
£237,000
+45.8%over 2 years7 November 1996
£162,500
Median price across the last 5 sales in AL6 0SB: £750,000 (2025–2018).
Nearby sales in AL6 0SB
Everything we know about 11a, 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
- A planning decision worth checking
Versus other Chestnut Walk homes
Floor Area for 11a lags the street by a wide margin.
Price per m²
£4,246
Street avg £4,419
Floor Area
120 m²
Street avg 174 m²
Habitable Rooms
7 rooms
Street avg 8 rooms
CO₂ Emissions
6.6 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.