18a, High Street, Welwyn, AL6 9EQ
About 18a
18a is a one-bedroom mid-terrace house in Welwyn (AL6 9EQ). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1900-1929 and council tax band B. At 56 m² this is the 2nd smallest of 13 units on EPC record in the building, where floor areas span 47–99 m². The building's EPC ratings span E to B across 13 units on file. The latest certificate (January 2017) shows a D (score 60), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 78).
Across 2007–2011, sale prices on this property compounded at -27.4% per year. Today's modelled estimate of £224,000 sits 79.2% above the 2011 sale of £125,000. Last sold in October 2011, so it's been off the market for around 15 years. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count.
Know exactly what you're buying at 18a
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
- Bedrooms1
- Bathrooms1
Energy performance
EPC Rating
Planning history
18a has no planning applications on record.
The full report still covers planning activity across the surrounding area.
Sales history & valuation
18a valuation runs notably under the typical sold price in this postcode.
£224,000
Modelled from EPC, postcode comparables and a sale-price growth of -27.4% per year over 4 years.
£125,000
Growth on file: -27.4% per year over 4 years.
Sales timeline
31 October 2011Most recent
£125,000
-73.1%over 4 years25 September 2007
£465,000
Median price across the last 5 sales in AL6 9EQ: £390,000 (2023–2003).
Everything we know about 18a, 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 High Street homes
18a is notably below the street on habitable rooms.
EPC Rating
60 (D)
Street avg 66 (D)
Floor Area
56 m²
Street avg 71 m²
CO₂ Emissions
3.3 t/year
Street avg 3.3 t/year
Habitable Rooms
2 rooms
Street avg 3 rooms
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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 Church — bus stop.
Closest school
0.4 km
Welwyn St Mary's Church of England Voluntary Aided Primary School. 8 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.