Napier House is a Grade II listed building in the Carmarthenshire local planning authority area, Wales. First listed on 19 May 1981. Town house. 2 related planning applications.

Napier House

WRENN ID
calm-ledge-spindle
Grade
II
Local Planning Authority
Carmarthenshire
Constituency
Caerfyrddin MP: Ann Davies (PC)
Country
Wales
Date first listed
19 May 1981
Type
Town house
Address
Napier House, 13 Spilman Street, Carmarthen, SA31 1JY
OS grid reference
SN 414 201
Coordinates
51.85691, -4.30346
Source
Cadw listing

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

Description

Napier House is a tall town house built in the early 19th century, constructed from squared rubble and red brick, topped with a pyramidal slate roof and flanked by yellow brick stacks. The building is three storeys high and features a two-window range. The front is made of rubble stone and includes two full-height recesses with recessed walling in red brick and arched heads also in red brick.

On the first floor, there are long 12-pane sash windows with cambered brick heads and slate sills. The upper floor has 6-pane sash windows with segmentally arched heads that follow the line of the arches of the recesses. The ground floor has a large tripartite sash window to the right, consisting of 4-12-4 panes set in a reeded frame. To the left, there is a doorway with an arched head and reeded frame, featuring a 9-panel door made of moulded and flush panels, along with a radiating-bar fanlight above. The entrance is sheltered by a 20th-century arched glass and timber porch with an open front. The house has a painted stone plinth.

Inside, there is an early 19th-century staircase with an open scrolled string and straight balusters. The entrance hall features a doorway with a reeded architrave and 9-panelled doors, with similar doorways leading to the first floor landing. The fireplaces throughout the house also have reeded architraves and plain mantle shelves.

Local climate

Napier House sits in one of the wettest parts of the UK, with an average of 1,270 mm of rain a year. This makes it wetter than 93% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.

It experiences an average of 30 freeze-thaw cycles a year, fewer than 64% of listed buildings. Of these, 14 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.
  • No sale records on file
  • Related listed building consents — 2 applications
  • 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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Nearby listed buildings

  1. 12 Spilman Street Grade II 13 m
  2. 14 Spilman Street Grade II 15 m
  3. 15 Spilman Street Grade II 23 m
  4. 16 Spilman Street Grade II 32 m
  5. 17 Spilman Street Grade II 40 m
  6. 18 Spilman Street Grade II 46 m
  7. 10 Spilman Street Grade II 49 m
  8. The Spilman Hotel Grade II 50 m
  9. 19 Spilman Street Grade II 52 m
  10. 9 Spilman Street Grade II 55 m