21 St Marys Road, Watford, WD18 0EE
About 21 St Marys Road
21 St Marys Road is a two-bedroom mid-terrace house in Watford (WD18 0EE). It has a recorded floor area of 78 m² (around 840 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (February 2021) shows a D (score 62), on the cusp of jumping into the C band. Earlier certificates rated it C (May 2009); the latest reading is one band lower. Between certificates, roof efficiency dropped from Average to Very Poor and hot-water efficiency dropped from Very Good to Good. The recommended improvements would lift it to B (score 82), a 2-band jump. Other recorded features include a loft.
Across 2012–2021, sale prices on this property compounded at 8% per year. Today's modelled estimate of £403,000 is 11.2% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£432/sq ft) was about 97.3% above the typical sold price in the postcode. Most recent transfer: May 2021 at £362,500. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Know exactly what you're buying at 21 St Marys Road
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
- Bedrooms2
- Bathrooms2
- Dining roomYes
- LoftYes
Building
- Central heatingYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Planning history
21 St Marys Road has no planning applications on record.
Notable planning nearby
7applications of note in the surrounding area
We flagged 1 thing worth checking at 21 St Marys Road
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
30-day money-back guarantee
Sales history & valuation
21 St Marys Road saw 3 transfers in just over a decade — high turnover for the postcode.
£403,000
Modelled from EPC, postcode comparables and a sale-price growth of 8.0% per year over 9 years.
£362,500
Growth on file: 8.0% per year over 9 years.
Sales timeline
16 May 2021Most recent
£362,500
+15.1%over 2 years2 August 2018
£315,000
+67.6%over 5 years2 November 2012
£188,000
Median price across the last 5 sales in WD18 0EE: £345,000 (2024–2020).
Nearby sales in WD18 0EE
Everything we know about 21 St Marys Road, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Signs of HMO activity in the area

Versus other St Marys Road homes
21 St Marys Road is notably below the street on years held.
Price per m²
£4,647
Street avg £3,585
Floor Area
78 m²
Street avg 73 m²
Habitable Rooms
4 rooms
Street avg 4 rooms
CO₂ Emissions
3.8 t/year
Street avg 3.7 t/year
Similar properties nearby
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1 Cannon Road
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1 Addison Court, St Marys View
WD18 0GR
1 Chester Road
WD18 0RG
1 Farthing Close
WD18 0BT
1 Bridgeford House, Cassio Road
WD18 0QR
The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
8/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Wiggenhall Road — bus stop.
Closest school
0.2 km
Watford Grammar School for Girls. 35 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
55.7dB

Night-time· 23:00 – 07:00
46.7dB