18 Monk Street is a Grade II listed building in the Monmouthshire local planning authority area, Wales. First listed on 27 June 1952. A C19 Residential. 1 related planning application.

18 Monk Street

WRENN ID
cold-terrace-river
Grade
II
Local Planning Authority
Monmouthshire
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
27 June 1952
Type
Residential
Address
18 Monk Street, Monmouth, NP25 3NZ
OS grid reference
SO 509 131
Coordinates
51.81461, -2.71325
Source
Cadw listing

Also on this page: sale history · EPC · related consents · flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Nos 16 and 18 Monk Street are a pair of houses dating from the early 19th century, built as a double-depth plan with a basement and three storeys. The front is smooth, rendered and painted at ground floor level, with rusticated detailing. Above, the render imitates vermiculated stonework, topped by a rendered modillion cornice and a parapet. A slate roof is largely hidden from the street, with brick stacks visible. The houses have a shared central Tuscan pediment above the front doors, incorporating a shell design at its centre, a frieze of metopes and triglyphs, and supported by three plain Tuscan columns. Two round-headed doorways lead to six-panel doors, two of which are glazed at No. 16, each with a fanlight above and a flight of steps leading up. The windows are wider at the sides than at the top, with double-hung sashes and glazing bars: the first floor windows have a 6 over 6 pane arrangement, with two outer half-panes on either side; the second floor windows are 3 over 3, also with the two outer panes being half-panes. Chimney stacks are situated on the gable walls of each house.

The rear elevation features a full-height basement with a significant ground level fall towards the river. Modern extensions occupy the centre of the ground floor, flanked either side. The basement and first floor feature 6 over 6 pane sashes with side half-panes as on the front elevation; a central first floor window is shared between the two houses. The second floor windows are 3 over 3, similarly with side half-panes. The houses are notable for their centrally placed, top-lit staircases and shared central rooms at the front and back, creating a flying freehold arrangement.

Inside, a central top-lit staircase has stick baluster details and a continuous mahogany handrail. The remaining joinery and plasterwork is of plain, early 19th-century design.

Local climate

18 Monk Street receives an average of 820 mm of rain a year. This makes it wetter than 52% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 57% of listed buildings.

It experiences an average of 42 freeze-thaw cycles a year, more than 80% of listed buildings. Of these, 19 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Full EPC report — heating system, energy costs, size, glazing, construction etc.
  • Sale history — 3 transactions since 2001
  • Related listed building consents — 1 application
  • Detailed attributes — period, style, materials, features
  • Flood risk assessment
  • Radon risk assessment
  • Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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  1. 16 Monk Street Grade II 6 m
  2. 20 Monk Street Grade II 7 m
  3. 14 Monk Street Grade II 11 m
  4. 12 Monk Street Grade II 17 m
  5. 13 Monk Street Grade II 24 m
  6. 17 Monk Street Grade II 25 m
  7. 15 Monk Street Grade II 25 m
  8. The Gatehouse Grade II 26 m
  9. 19 Monk Street Grade II 27 m
  10. 21 Monk Street Grade II 30 m