20 Becket Gardens, Welwyn, AL6 9JE
About 20 Becket Gardens
20 Becket Gardens is a three-bedroom semi-detached house in Welwyn (AL6 9JE). It has a recorded floor area of 82 m² (around 883 sq ft), construction records dating it to 1967-1975 and council tax band E. The latest certificate (January 2024) shows a C (score 69), just inside the C band. The recommended improvements would push it to B (score 84).
One planning record on file: an extension approved in 2024. Past consents include an extension, meaningful when judging how the property has evolved. Across 1999–2024, sale prices on this property compounded at 5.8% per year. On a £-per-square-foot basis, the last sale (£532/sq ft) was about 51.9% above the typical sold price in the postcode. At 82 m² it's 18% smaller than the typical home in the postcode (100 m² median across 26 EPCs). Last sale on file: £470,000 in June 2024.
Know exactly what you're buying at 20 Becket Gardens
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
What this property has
Inside
- Bedrooms3
- Bathrooms1
Energy performance
EPC Rating
Planning history
20 Becket Gardens has an approved single-storey rear extension on the planning record.
- Oct 2024ExtensionOutlineIn report
Extension: Single storey · Rear of property
Prior approval for the erection of a single storey rear extension measuring 4m in depth, 3.8m in height and 2.9m to the eaves
- Reference
- 6/2024/1761/PN8
What's in 20 Becket Gardens, Welwyn, AL6 9JE's planning history?
Refusals, disputes and full decisions on this property and nearby, in the report.
Sales history & valuation
20 Becket Gardens has more than quadrupled in price since its earliest registered sale in 1999.
£499,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.8% per year over 25 years.
£470,000
Growth on file: 5.8% per year over 25 years.
Sales timeline
6 June 2024Most recent
£470,000
+303.4%over 24 years15 November 1999
£116,500
Median price across the last 5 sales in AL6 9JE: £420,000 (2025–2023).
Everything we know about 20 Becket Gardens, 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 Becket Gardens homes
Price per m² for 20 Becket Gardens runs comfortably ahead of the street norm.
Price per m²
£5,732
Street avg £4,610
Floor Area
82 m²
Street avg 97 m²
Habitable Rooms
4 rooms
Street avg 5 rooms
CO₂ Emissions
3.1 t/year
Street avg 3.9 t/year
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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
St Mary's School — bus stop.
Closest school
0.2 km
Welwyn St Mary's Church of England Voluntary Aided Primary School. 9 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.