34 St Mary Street, Monmouth, NP25 3DD
About 34 St Mary Street
34 St Mary Street is a four-bedroom mid-terrace house in Monmouth (NP25 3DD). It has a recorded floor area of 121 m² (around 1302 sq ft), construction records dating it to before 1900 and council tax band F. It is a listed building, which means external alterations are tightly controlled but it may qualify for heritage tax reliefs. Other recorded features include a basement. Period features are noted in the property record. The latest certificate (October 2022) shows a D (score 67), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since November 2011. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Very Poor to Poor and lighting went from Good to Very Good. The recommended improvements would lift it to B (score 88), a 2-band jump.
2 planning records sit against the property, 2 approved, 0 refused. Past consents include an extension, meaningful when judging how the property has evolved. Across 1998–2024, sale prices on this property compounded at 7.7% per year. On a £-per-square-foot basis, the last sale (£392/sq ft) was about 90% above the typical sold price in the postcode. Last sale on file: £510,000 in October 2024.
Know exactly what you're buying at 34 St Mary Street
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
- BasementYes
Outside
- Private gardenRear
- ParkingAllocated
Building
- Listed buildingYes
- Period featuresYes
- RefurbishedYes
Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Single glazing replaced with double or better glazing
Roof insulation improved
More low energy lighting installed
Planning history
Council records include a part-single-part-two-storey extension at 34 St Mary Street.
- Sept 2007ExtensionFullIn report
Extension: Part single, part two storey
Ground & first floor extensions to provide living room & bedroom accommodation.
- Documents
- 42 docs on file
- Reference
- DC/2006/01644
- Sept 2007ExtensionHeritageIn report
Extension: Rear of property
Alteration & extensions to rear.
- Documents
- 57 docs on file
- Reference
- DC/2006/01650
We flagged 1 thing worth checking at 34 St Mary Street
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
30-day money-back guarantee
Sales history & valuation
Price for 34 St Mary Street has grown more than fourfold since the 1998 starting point.
£538,000
Modelled from EPC, postcode comparables and a sale-price growth of 7.7% per year over 26 years.
£510,000
Growth on file: 7.7% per year over 26 years.
Sales timeline
22 October 2024Most recent
£510,000
6 June 2023
£510,000
+54.5%over 11 years8 March 2012
£330,000
+340.0%over 13 years30 November 1998
£75,000
Median price across the last 5 sales in NP25 3DD: £230,000 (2024–2021).
Nearby sales in NP25 3DD
Everything we know about 34 St Mary Street, 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

Versus other St Mary Street homes
On years held, 34 St Mary Street runs well behind the street norm.
Price per m²
£4,215
Street avg £2,966
Floor Area
121 m²
Street avg 126 m²
Habitable Rooms
6 rooms
Street avg 6 rooms
CO₂ Emissions
4.6 t/year
Street avg 6.3 t/year
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The neighbourhood at a glance
Crime
1/mo
Steady year-on-year across the wider district.
Nearest stop
0.1 km
Monmouth School — bus stop.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.