12a, Birch Grove, Welwyn, AL6 0QP
About 12a
12a is a three-bedroom detached house in Welwyn (AL6 0QP). It has a recorded floor area of 97 m² (around 1044 sq ft), construction records dating it to 1983-1990 and council tax band E. The latest certificate (April 2023) shows a C (score 71). When first surveyed in March 2011 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Good to Very Good and lighting went from Very Poor to Very Good. The recommended improvements would push it to B (score 84). Other recorded features include notable views. The home occupies a cul-de-sac position.
Across 2000–2015, sale prices on this property compounded at 6.7% per year. Today's modelled estimate of £585,000 sits 56.8% above the 2015 sale of £373,000. On a £-per-square-foot basis, the last sale (£357/sq ft) was about 20.8% above the typical sold price in the postcode. One planning record on file: tree works approved in 2023. Past consents include tree works, meaningful when judging how the property has evolved. Last sold in July 2015, so it's been off the market for around 11 years. At 97 m² it's 16.7% smaller than the typical home in the postcode (117 m² median across 20 EPCs).
Know exactly what you're buying at 12a
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
- Bedrooms3
- Bathrooms1
- CloakroomYes
Outside
- Private gardenSouth-west-facing
- GarageYes
- Notable viewsYes
- Cul-de-sacYes
Building
- RefurbishedYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Windows upgraded, improving insulation
Loft insulation upgraded to recommended levels
More low energy lighting installed
Planning history
- Jan 2023Tree WorksTreesIn report
Oak tree to crown reduce by 1m. Tree located in woodland to the rear covered by TPO 657 (2017) W1.
- Reference
- 6/2022/2722/TPO
We flagged 1 thing worth checking at 12a
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
12a has more than doubled in price since the earliest registered sale in 2000.
£585,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.7% per year over 15 years.
£373,000
Growth on file: 6.7% per year over 15 years.
Sales timeline
1 July 2015Most recent
£373,000
+43.5%over 3 years28 June 2012
£260,000
+89.1%over 12 years14 January 2000
£137,500
Median price across the last 5 sales in AL6 0QP: £670,000 (2025–2023).
Everything we know about 12a, 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 Birch Grove homes
12a outperforms the street on co₂ emissions by a wide margin.
Price per m²
£3,845
Street avg £4,133
Floor Area
97 m²
Street avg 133 m²
Habitable Rooms
4 rooms
Street avg 6 rooms
CO₂ Emissions
3.3 t/year
Street avg 5.3 t/year
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The neighbourhood at a glance
Crime
2/mo
Steady year-on-year across the wider district.
Nearest stop
0.4 km
The North Star PH — bus stop.
Closest school
0.3 km
Oaklands 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.