21 St Marys Close, Hilperton Marsh, Trowbridge, BA14 7PN
About 21 St Marys Close
21 St Marys Close is a four-bedroom semi-detached house in Hilperton Marsh, Trowbridge, Trowbridge (BA14 7PN). It has a recorded floor area of 142 m² (around 1528 sq ft), construction records dating it to 1967-1975 and council tax band D. The latest certificate (April 2016) shows a C (score 70). When first surveyed in August 2015 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Poor to Good, roof efficiency went from Very Poor to Poor and window efficiency went from Average to Good. The recommended improvements would push it to B (score 83). The latest certificate is from April 2016, so improvements made since then won't be reflected. Records show the property has been extended at some point in its history.
One planning record on file: an extension approved in 2004. Past consents include an extension and a conservatory, meaningful when judging how the property has evolved. At 142 m² it's 20.3% larger than the typical home in the postcode (118 m² median across 10 EPCs). Its energy rating outperforms most of the postcode (better than 70% of similar EPCs). Across 2004–2016, sale prices on this property compounded at 3.5% per year. Today's modelled estimate of £387,000 is 34.6% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£188/sq ft) was about 18% above the typical sold price in the postcode. Last sold in June 2016, so it's been off the market for around 10 years.
Know exactly what you're buying at 21 St Marys Close
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
- Bedrooms4
- Bathrooms2
- EnsuiteYes
Outside
- Private gardenYes
- ParkingOff road
Building
- Previously extendedYes
Energy performance
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 16 Apr 2026
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water efficiency improved
Window efficiency improved
Cavity wall insulation installed
Roof insulation improved
Planning history
21 St Marys Close has an approved extension on the planning record.
- Sept 2004
We flagged 2 things worth checking at 21 St Marys Close
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.
- Larger development activity nearby
- Recent ownership pattern worth a look
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Sales history & valuation
21 St Marys Close changed hands twice within eighteen months — unusual for the area.
£387,000
Modelled from EPC, postcode comparables and a sale-price growth of 3.5% per year over 12 years.
£287,500
Growth on file: 3.5% per year over 12 years.
Sales timeline
22 June 2016Most recent
£287,500
+31.9%over 8 months27 October 2015
£218,000
+14.8%over 11 years16 June 2004
£189,950
Median price across the last 5 sales in BA14 7PN: £285,000 (2023–2018).
Nearby sales in BA14 7PN
3 St Marys Close, Hilperton Marsh, Trowbridge, BA14 7PN
Sold Dec 2023
£360,00029 St Marys Close, Hilperton Marsh, Trowbridge, BA14 7PN
Sold May 2019
£285,0007 St Marys Close, Hilperton Marsh, Trowbridge, BA14 7PN
Sold Jan 2019
£245,00027 St Marys Close, Hilperton Marsh, Trowbridge, BA14 7PN
Sold Jul 2018
£269,95013 St Marys Close, Hilperton Marsh, Trowbridge, BA14 7PN
Sold Mar 2016
£245,000
Everything we know about 21 St Marys Close, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby
- Recent ownership pattern worth a look

Versus other St Marys Close homes
21 St Marys Close outperforms the street on floor area by a wide margin.
Price per m²
£2,025
Street avg £2,169
Floor Area
142 m²
Street avg 113 m²
Habitable Rooms
7 rooms
Street avg 6 rooms
CO₂ Emissions
4.6 t/year
Street avg 4.7 t/year
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The neighbourhood at a glance
Crime
3/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
St Marys Gardens — bus stop.
Closest school
0.7 km
Hilperton Church of England Voluntary Controlled Primary School. 13 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.