6 St Marys Close, Platt, Sevenoaks, TN15 8NH
About 6 St Marys Close
6 St Marys Close is a three-bedroom detached house in Platt, Sevenoaks, Sevenoaks (TN15 8NH). It has a recorded floor area of 241 m² (around 2594 sq ft), construction records dating it to 1967-1975 and council tax band F. The latest certificate (May 2019) returns a B (score 84), comfortably above the UK average. When first surveyed in January 2015 the rating was E, the property has climbed 3 bands since. Between certificates, wall efficiency went from Poor to Very Good, window efficiency went from Average to Very Good and hot-water efficiency went from Poor to Good. The recommended improvements would push it to A (score 98). Our model identifies extension potential, subject to local planning policy.
At 241 m² the property is well over the postcode median (122 m² across 4 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Today's modelled estimate of £938,000 sits 95.4% above the 2015 sale of £480,000. On a £-per-square-foot basis, the last sale (£185/sq ft) was about 43.6% below the postcode norm. 4 planning records sit against the property, 4 approved, 0 refused. Past consents include an extension, a loft conversion and a porch, meaningful when judging how the property has evolved. On the market in July 2015 and unlisted since — roughly 11 years.
Know exactly what you're buying at 6 St Marys Close
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
- Bedrooms3
- Bathrooms1
Outside
- Private gardenYes
- GarageYes
Building
- Extension potentialPossible
Energy performance
6 St Marys Close ranks among the most efficient homes in the postcode for energy use.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
High performance glazing installed
Cavity wall insulation installed
Floor insulation added or improved
More low energy lighting installed
Planning history
6 St Marys Close has been through 4 approved planning applications — a well-evolved property.
- Jun 2017RenovationAmendmentIn report
Non material amendment to planning permission TM/17/00060/FL: To replace the two velux windows on the front of the property with a dormer window
- Council
- Team 2
- Documents
- 2 docs on file
- Reference
- 17/01340/NMA
- May 2017New BuildAmendmentIn report
Non material amendment (use eternit slate tiles on the roof instead of clay roof tiles) to planning permission 17/00060/FL : Erection of replacement chalet-style three bedroom dwelling
- Council
- Team 2
- Documents
- 4 docs on file
- Reference
- 17/01075/NMA
What's in 6 St Marys Close, Platt, Sevenoaks, TN15 8NH's planning history?
2 more on this property, plus refusals, disputes and full decisions nearby, in the report.
Sales history & valuation
6 St Marys Close valuation sits well clear of the typical sold price in this postcode.
£938,000
Modelled from EPC, postcode comparables.
£480,000
Recorded with HM Land Registry.
Sales timeline
13 July 2015Most recent
£480,000
Median price across the last 5 sales in TN15 8NH: £515,000 (2024–2009).
Nearby sales in TN15 8NH
11 St Marys Close, Platt, Sevenoaks, TN15 8NH
Sold Jul 2024
£672,0003 St Marys Close, Platt, Sevenoaks, TN15 8NH
Sold Sept 2023
£660,0009 St Marys Close, Platt, Sevenoaks, TN15 8NH
Sold Sept 2015
£515,0002 St Marys Close, Platt, Sevenoaks, TN15 8NH
Sold Oct 2009
£304,0005 St Marys Close, Platt, Sevenoaks, TN15 8NH
Sold Nov 2008
£370,000
Everything we know about 6 St Marys Close, 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 St Marys Close homes
Price per m² for 6 St Marys Close lags the street by a wide margin.
Price per m²
£1,992
Street avg £4,477
Floor Area
241 m²
Street avg 119 m²
CO₂ Emissions
3.4 t/year
Street avg 5.6 t/year
Years Held
11 years
Street avg 8 years
Similar properties nearby
1 Crouch Cottages, Long Mill Lane, Crouch, Borough Green
TN15 8QB
1 Crouch Lane, Borough Green
TN15 8LU
1 Church Villas, Long Mill Lane, Platt
TN15 8LZ
1 Brickmakers Meadows, Platt
TN15 8NQ
1 Black Barn Cottages, Crouch Lane, Borough Green
TN15 8LX
1 Bangays Way, Borough Green
TN15 8FS
1 Eaglestone Close, Borough Green
TN15 8EL
1 Allingham Close, Borough Green
TN15 8FX
The neighbourhood at a glance
Daytime road noise here sits well below conversation level — a quiet pocket of the postcode.
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.3 km
Platt Common — bus stop.
Closest school
0.3 km
Platt Church of England Voluntary Aided Primary School. 4 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
47.6dB

Night-time· 23:00 – 07:00
40.1dB