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Get started17 By The Mount is a mid-terrace house in Welwyn Garden City (AL7 3SY). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1983-1990 and council tax band B. The latest certificate (February 2021) returns a B (score 81), comfortably above the UK average. When first surveyed in November 2009 the rating was C, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Average to Good, lighting went from Very Poor to Very Good and main heating went from Average to Good. At 46 m² this is the 3rd smallest of 30 units on EPC record in the building, where floor areas span 41–96 m². The building's EPC ratings span D to B, with this unit at the top. On EPC score it ranks first in the building (81 versus a worst of 67).
Sale prices here have outpaced England HPI: 6.3% per year against 0% for the wider region. Today's modelled estimate of £200,000 is 12.7% above the 2019 sale price. At 46 m² it's 19.3% smaller than the typical home in the postcode (57 m² median across 29 EPCs). On energy efficiency it sits in the top 10% of properties in this postcode. Most recent transfer: May 2019 at £177,500.
17 By The Mount ranks among the most efficient homes in the postcode for energy use.
17 By The Mount has more than tripled in price since its earliest registered sale in 2000.
£200,000
Modelled from EPC, postcode comparables and a sale-price growth of 6.3% per year over 19 years.
£177,500
Growth on file: 6.3% per year over 19 years.
17 By The Mount outperforms the street on epc rating by a wide margin.
Price per m²
£3,859
Street avg £3,855
Floor Area
46 m²
Street avg 51 m²
Habitable Rooms
2 rooms
Rail-style transport is unusually close for this postcode.
Crime
5/mo
Steady year-on-year across the wider district.
Nearest stop
0.0 km
Broadwater Crescent — bus stop.
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency improved
More low energy lighting installed
Are we missing something? Tell us about home improvements to help adjust your valuation.
16 May 2019Most recent
£177,500
+222.7%over 19 years24 January 2000
£55,000
Median price across the last 5 sales in AL7 3SY: £390,000 (2025–2020).
Street avg 3 rooms
CO₂ Emissions
1.0 t/year
Street avg 1.6 t/year
Closest school
0.5 km
Our Lady Catholic Primary School. 22 schools nearby.
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