Chapel, Saint Joseph's (Formerly Garthland), Largs Road, Lochwinnoch

David King, 1796; altered and extended 1820-1830. 7-bay, 2-storey with upper breaking eaves, irregular-plan Tudor style mansion house linked to 3-storey, 7-bay 1936 dormitory block to right and single storey chapel to left, 1943 by Thomas Cordiner.

HOUSE: advanced gabled entrance bay with stone cross finial and prominent pitched roofed and arcaded timber and glazed porch; wide canted 5-light window with castellated parapet to right; advanced gabled bay further right. Pedimented breaking eaves dormers with fleur-de-lys finials and scroll decoration; tall, Tudor diamond-shafted chimneystacks. Advanced and recessed gables to S (side) and rear elevations with blind windows, pedimented and box dormers. Stugged, squared and snecked yellow sandstone rubble; raised ashlar margins and dressings; base course; banded eaves course. Coped sandstone skews; moulded skewputts

Predominantly 12-pane timber sash and case windows, some plate glass in sash and case windows. Pitched grey slates; lead flashings and ridge mouldings. Irregular ridge and gable end chimneystacks, Cast-iron rainwater goods.

INTERIOR: fine plasterwork cornices and ceiling roses to principle ground floor interiors. Dog-leg stair with cast iron, ornamental balusters and mahogany hand-rail.

CHAPEL: Thomas Smith Cordiner, 1943. 6-bay, single storey, buff brick Roman Catholic chapel on E-W axis accessed via 3 bay, 2 storey brick wing linked to house to W. Central circular apse with conical roof to E; relief sculpture of Saint Joseph by John Mortimer flanking stained glass windows. External door at E end of S wall. Metal casement windows with glazing bars and hoppers; four spoked, circular wheel-window to gabled rear (W) elevation; slated roofs. Barrel vaulted interior; six side chapels; Art Deco pink and black marble altar pieces with mosaic panels; wooden pews.

DORMITORY BLOCK TO N: 8-bay, 3-storey, rectangular-plan hospital ward block and plain Art-Deco style. Prominent entrance and stair tower with long multi-paned window; 1st and 2nd storeys recessed. Coursed red sandstone rubble with ashlar margins; coursed polished red sandstone ashlar at advanced ground floor level. Large, multi-paned metal casement windows. Bonded brick wall to far left adjoining house at ground floor.

ANCILLARY STRUCTURES: 19th century workshop building adjoining house to rear, with walled garden and associated ancillary structures occupying ground to immediate West.