21 St Marys Road, Long Ditton, Surbiton, KT6 5EU
About 21 St Marys Road
21 St Marys Road is a five-bedroom detached house in Long Ditton, Surbiton, Surbiton (KT6 5EU). It has a recorded floor area of 528 m² (around 5683 sq ft), construction records dating it to 2012 onwards and council tax band G. The latest certificate (December 2023) returns a B (score 81), comfortably above the UK average. When first surveyed in May 2013 the rating was C, the property has climbed 1 band since. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Very Good to Good and hot-water efficiency dropped from Very Good to Poor. Main heating runs on electricity. Other recorded features include a loft.
Across 2007–2014, sale prices on this property compounded at 21.4% per year. Today's modelled estimate of £1,905,000 is 23.8% below the 2014 sale of £2,500,000, below the original sale price, which typically signals condition or completion-status changes worth verifying. On a £-per-square-foot basis, the last sale (£440/sq ft) was about 53.1% above the typical sold price in the postcode. At 528 m² the property is well over the postcode median (238 m² across 14 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 86% of similar EPCs). Last sold in July 2014, so it's been off the market for around 12 years. 6 planning records sit against the property, 3 approved, 2 refused.
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
- Bedrooms5
- Bathrooms3
- Open-plan layoutYes
- Utility roomYes
- StudyYes
- LoftYes
Outside
- Private gardenYes
Energy performance
Achieving this rating across a home of this size is uncommon — larger homes typically score lower.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heat pump installed, significantly improving energy efficiency
Changed to a more efficient fuel source
Hot water system changed
Loft insulation upgraded to recommended levels
Planning history
- Nov 2012ConditionsIn report
Confirmation of Compliance with Conditions: 3 (Materials) and 5 (Landscaping) of planning permission 2008/0465
- Documents
- 2 docs on file
- Reference
- 2010/0812
- Jun 2011RenovationFullIn report
1.8 metre high timber entrance gate and 2.2 metre high brick piers
- Documents
- 7 docs on file
- Reference
- 2011/5412
We flagged 2 things 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
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
Latest sale on 21 St Marys Road was the highest on Land Registry record across the postcode.
£1,905,000
Modelled from EPC, postcode comparables and a sale-price growth of 21.4% per year over 7 years.
£2,500,000
Growth on file: 21.4% per year over 7 years.
Sales timeline
17 July 2014Most recent
£2,500,000
+262.3%over 6 years30 November 2007
£690,000
Median price across the last 5 sales in KT6 5EU: £585,000 (2024–2019).
Nearby sales in KT6 5EU
1b, St Marys Road, Long Ditton, Surbiton, KT6 5EU
Sold Dec 2024
£1,550,000Oakdene, Flat 2, 27 St Marys Road, Long Ditton, Surbiton, KT6 5EU
Sold Jan 2023
£522,600Oakdene, Flat 5, 27 St Marys Road, Long Ditton, Surbiton, KT6 5EU
Sold Jul 2022
£585,00011 St Marys Road, Long Ditton, Surbiton, KT6 5EU
Sold Jul 2019
£1,872,00017 St Marys Road, Long Ditton, Surbiton, KT6 5EU
Sold Sept 2013
£2,325,000
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
- Larger development activity nearby

Versus other St Marys Road homes
21 St Marys Road outperforms the street on floor area by a wide margin.
Price per m²
£4,735
Street avg £4,585
Floor Area
528 m²
Street avg 281 m²
Habitable Rooms
10 rooms
Street avg 10 rooms
CO₂ Emissions
4.7 t/year
Street avg 8.2 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
9/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
St Mary's Road — bus stop.
Closest school
0.4 km
Long Ditton Infant and Nursery School. 29 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
51.4dB

Night-time· 23:00 – 07:00
40.6dB