Seaway House is a Grade II listed building in the Cardiff local planning authority area, Wales. First listed on 20 August 1992. House, shop.

Seaway House

WRENN ID
tattered-gateway-heath
Grade
II
Local Planning Authority
Cardiff
Constituency
Cardiff South and Penarth MP: Stephen Doughty (Lab)
Country
Wales
Date first listed
20 August 1992
Type
House, shop
Address
Seaway House, 55 Bute Street, Butetown, CF10 5AH
OS grid reference
ST 191 747
Coordinates
51.46575, -3.16582
Source
Cadw listing

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

Description

Seaway House is a three-storey block incorporating Free Classical, French Renaissance, and Dutch influences, dating to the early 20th century. It was originally constructed as Dock Chambers. The building is primarily red brick with a Bath stone ground floor facing and dressings, featuring channelled pilaster strips and gable parapets. The ground floor has thin cement stacks with cornices to the front and rear. The facade is gently stepped, composed of repeated sections of five bays, with an advanced central bay crowned by a steep, French-style roof and an elaborate dormer. Each section is defined by channelled pilaster strips. The building is notable for its shaped gables at the centre of each group of five bays, flanked by a pierced parapet that retains urn finials on the left side, along with pendants (finials now missing) and circular attic windows. Most windows are four-pane sashes; the central block has tripartite windows, including a pedimented cornice to the first floor and flanking blind ovals in a 17th-century style, decorated with draped festoons. The second floor has bracket sills set into a stone band course. There is a stringcourse and vermiculated voussoirs to the first floor, and a deep frieze band to the ground floor. Central windows and entrances within each five-bay section have enriched ornamentation above the cornices, with round-arched doorways, keystones, pilasters, and panelled double doors. Original ground floor windows are segmental, except for those in the central block, which are semicircular.

Alterations to the right-hand end include the addition of a grander bank frontage, extended one bay beyond the corner, at a single storey, featuring a pedimented Tuscan Doric entrance, channelled pilasters, modillion cornices and a high granite plinth. The left-hand half has undergone more significant alterations, including a garage door entry piercing the extreme left end and the removal of scrolled ornament from the windows. However, the inner five-bay section on this side has been given a Grecian Classical treatment, incorporating surrounds to a shop window, a vehicular entrance, and a central entrance with an anthemion finial, egg and dart, and fretwork ornament, as well as panelled doors with a latticed overlight. The rear elevation has similar but simpler detailing, with four- and five-window sections flanking a central projection. The right-hand end features twin gables and a central chimney. A flat roofed, open-plan extension is present at the rear, internally supported by iron Doric columns.

Internally, Dock Chambers has open-well staircases with ironwork balustrades, bulbous newels, and scrolled handrails. The interior features panelled doors and reveals, with round-arched and segmental architraves. A ground floor front room in No. 4 has a plaster frieze, fluted columns to the chimneypiece, and panelled shutters.

Local climate

Seaway House sits in a wetter-than-average part of the UK, with an average of 1,080 mm of rain a year. This makes it wetter than 86% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.

It experiences an average of 22 freeze-thaw cycles a year, fewer than 77% of listed buildings. Of these, 8 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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  • No EPC on record for this property
  • Sale history — 1 transaction since 2016
  • No related consent applications matched
  • 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. 5 Dock Chambers (Emlyn House) Grade II 8 m
  2. 4 Dock Chambers (Emlyn House) Grade II 18 m
  3. 54c Bute Street Grade II 32 m
  4. Baltimore Hotel Grade II 32 m
  5. 54b Bute Street Grade II 44 m
  6. The Jug & Platter (Formerly The Bute Dock) Grade II 48 m
  7. National Westminster Bank Grade II* 48 m
  8. Former H.M.Immigration Office Grade II 51 m
  9. 122 Bute Street Grade II 51 m
  10. 123 Bute Street Grade II 56 m