30a, St Johns Road, Watford, WD17 1QA
About 30a
30a is a two-bedroom semi-detached house in Watford (WD17 1QA). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (July 2020) shows a C (score 69), just inside the C band. The rating has held steady at C across 2 certificates since January 2010. Between certificates, roof efficiency went from Average to Good and lighting went from Good to Very Good; while wall efficiency dropped from Good to Very Poor.
It hasn't traded since May 2010, a hold of 16 years that's notably long for the area. Across 2001–2010, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £322,000 sits 63.5% above the 2010 sale of £197,000. On a £-per-square-foot basis, the last sale (£247/sq ft) was about 23.7% below the postcode norm. At 74 m² it sits well below the postcode median (127 m² across 6 EPCs), making it one of the more compact homes locally.
What this property has
Inside
- Bedrooms2
- Bathrooms1
- Dining roomYes
- CloakroomYes
- EnsuiteYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Roof insulation improved
More low energy lighting installed
Planning history
30a has no planning applications on record.
Notable planning nearby
7applications of note in the surrounding area
We flagged 2 things worth checking at 30a
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.
- Signs of HMO activity in the area
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
30a saw 3 transfers in just over a decade — high turnover for the postcode.
£322,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.8% per year over 9 years.
£197,000
Growth on file: 5.8% per year over 9 years.
Sales timeline
27 May 2010Most recent
£197,000
+7.1%over 2 years7 February 2008
£184,000
+56.6%over 6 years3 April 2001
£117,500
Median price across the last 5 sales in WD17 1QA: £590,000 (2022–2015).
Nearby sales in WD17 1QA
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
10/mo
Steady year-on-year across the wider district.
Nearest stop
0.2 km
West Street — bus stop.
Closest school
0.4 km
Watford St John's Church of England Primary School. 36 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode

Daytime· 07:00 – 23:00
54.3dB

Night-time· 23:00 – 07:00
44.8dB








