Osborne House is a Grade II listed building in the Welwyn Hatfield local planning authority area, England. First listed on 28 April 2000. Villa. 1 related planning application.
Osborne House
- WRENN ID
- graven-wall-swallow
- Grade
- II
- Local Planning Authority
- Welwyn Hatfield
- Constituency
- Welwyn Hatfield MP: Andrew Lewin (Lab)
- Country
- England
- Date first listed
- 28 April 2000
- Type
- Villa
- Address
- Osborne House, Osborne Road, North Mymms, EN6 1SE
- OS grid reference
- TL 258 025
- Coordinates
- 51.70751, -0.18024
- Source
- Historic England listing
Description
Osborne House is a villa dating to approximately 1855-58. It is built of colour-washed render with a slate roof and brick chimneys. The design is of a double-pile plan, featuring a taller front range with a hipped roof and rear rooms under a gently sloping catslide. Original outbuildings are attached at right angles to the rear, and the main house has cellars.
The symmetrical front facade has three bays of sash windows, each framed by rendered architraves and vermiculated keyblocks. Lower windows have deep stone sills resting on scroll brackets, while upper windows have rendered sills supported by consoles with lion’s heads. The central entrance features a six-panelled door with an ornamental metalwork overlight, all within a richly decorated rendered doorcase. This includes a shell and dart architrave, tapering pilasters, small cartouches, and an enriched cornice, approached by two shaped stone steps with simple iron railings. A full-height semi-circular bay with banded rustication and tripartite sash windows is on the left return; the lower opening incorporates central curved French doors with marginal glazing and traceried top and bottom lights. Casement windows are on the rear range, with later flat-roofed semi-dormers accommodating first-floor rear windows. The single-storey outbuildings to the rear have pantile roofs. The block nearest the house has been enlarged around an original connecting passage; the middle block, previously a brewhouse, coal cellar and henhouse, features wooden casements and a door; and the far block, originally a coach house and stable, has undergone significant alterations.
The interior of the front parlours displays coved plaster ceiling cornices and four-panel doors within moulded architraves; the left parlour also has deep moulded skirtings. Fireplaces have been altered. Bedrooms above retain original, simple wooden fireplace surrounds. A former kitchen at the rear of the left parlour has a stone-flagged floor, an internal window with octagonal glazing, and an inserted 18th century wooden fireplace carved in the Adam style with figured panels and enriched fluting. The staircase has matchstick balusters and slender turned newels. Timbers reused from a previous timber-framed building are incorporated within the roof and cellar.
The deeds indicate that Osborne House replaced an earlier farmhouse, with the original farm outbuildings demolished to create new lawns. It represents a late example of the classical villa style, notable for its fine detailing and clear distinction between the high-status front rooms and the service rooms positioned towards the rear.
Local climate
Osborne House sits in one of the driest parts of the UK, with an average of 700 mm of rain a year. This makes it drier than 91% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 90% of listed buildings.
It experiences an average of 33 freeze-thaw cycles a year, fewer than 54% of listed buildings. Of these, 15 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
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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