11 Byfield, Welwyn Garden City, AL8 7AL
About 11 Byfield
11 Byfield is a three-bedroom semi-detached house in Welwyn Garden City (AL8 7AL). It has a recorded floor area of 89 m² (around 958 sq ft), construction records dating it to 1950-1966 and council tax band D. The latest certificate (May 2017) shows a C (score 73). When first surveyed in June 2009 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Good, roof efficiency went from Average to Good and hot-water efficiency went from Poor to Good. The recommended improvements would push it to B (score 87).
Across 2009–2018, sale prices on this property compounded at 9.2% per year. Today's modelled estimate of £472,000 is 28.4% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£384/sq ft) was about 45.3% above the typical sold price in the postcode. On the market in February 2018 and unlisted since — roughly 8 years.
Know exactly what you're buying at 11 Byfield
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
- StudyYes
Outside
- Private gardenYes
- ParkingOff street
Building
- Heating systemGas
- RefurbishedYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
Hot water system upgraded
More low energy lighting installed
Heating controls upgraded for better temperature management
Cavity wall insulation installed
Loft insulation upgraded to recommended levels
Planning history
11 Byfield has no planning applications on record.
Notable planning nearby
1applications of note in the surrounding area
Sales history & valuation
11 Byfield has more than doubled in price since the earliest registered sale in 2009.
£472,000
Modelled from EPC, postcode comparables and a sale-price growth of 9.2% per year over 8 years.
£367,500
Growth on file: 9.2% per year over 8 years.
Sales timeline
14 February 2018Most recent
£367,500
+110.0%over 8 years31 August 2009
£175,000
Median price across the last 5 sales in AL8 7AL: £387,500 (2025–2022).
Nearby sales in AL8 7AL
Everything we know about 11 Byfield, 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 Byfield homes
11 Byfield outperforms the street on floor area by a wide margin.
Price per m²
£4,129
Street avg £3,881
Floor Area
89 m²
Street avg 87 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
2.7 t/year
Street avg 3.5 t/year
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1 Digswell House Mews
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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
Sewells — bus stop.
Closest school
0.2 km
Harwood Hill Junior Mixed Infant and Nursery School. 19 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.