Roman House is a Grade I listed building in the Dorset local planning authority area, England. First listed on 8 May 1950. A {"shortly after c.307","after c.341","4th century"} Roman town house. 1 related planning application.

Roman House

WRENN ID
nether-cobble-marsh
Grade
I
Local Planning Authority
Dorset
Constituency
West Dorset MP: Edward Morello (LD)
Country
England
Date first listed
8 May 1950
Type
Roman town house
Period
{"shortly after c.307","after c.341","4th century"}
Address
Roman House, Colliton Park, Dorchester, DT1 1XJ
OS grid reference
SY 689 909
Coordinates
50.71746, -2.4411
Source
Historic England listing

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

Description

Roman House, located in Colliton Park, dates back to shortly after 307 AD and was enlarged around 341 AD. It is the only Roman town house visible in Britain. The structure features an H-shaped west wing that includes a hypocaust and mosaic pavements. Additionally, a south range was added in the 4th century, which contains one heated room and one kitchen, situated well north of the south range. The site was excavated in 1938.

Local climate

Roman House receives an average of 840 mm of rain a year. This makes it wetter than 55% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 77% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 5 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 — 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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Nearby listed buildings

  1. Wall on West and North Sides of Colliton Park Grade II 46 m
  2. 8, Glyde Path Road Grade II 111 m
  3. Hangman's Cottage Grade II 112 m
  4. Infant School Grade II 113 m
  5. Bridge 40 Feet East of Hangmans Cottage on Path Leading Towards Frome Whitfield House Grade II 134 m
  6. 22 and 23, Glyde Path Road Grade II 139 m
  7. 21, Glyde Path Road Grade II 139 m
  8. Bridge, 30 Feet North of the Bridge 40 Feet East of Hangmans Cottage, on Path Leading Towards Frome Whitfield House Grade II 144 m
  9. Sluice, 30 Feet East of the 2 Bridges on the Path Leading from Hangmans Cottage Towards Frome Whitfield House Grade II 151 m
  10. 31, Glyde Path Road Grade II 156 m