105-123 St Mark's Road and 1-3 Cowper Terrace (consec), including front boundary walls, garden party walls and access steps, railings and walls

Terrace of houses and flats designed by Jeremy and Fenella Dixon, built 1977-1979.

The development occupies an acutely-angled site at the junction of St Mark's Road and Cowper Terrace. It comprises 18 narrow-fronted houses arranged in handed pairs above semi-basement flats, fronting St Mark's Road, with a further three pairs on Cowper Terrace and a detached three-storey corner block of flats. External steps provide access up to the houses and down to the flats from street level. The units at the north and south ends of St Mark's Road and the Cowper Terrace group rise to three storeys above basement level, while the intervening units on St Mark's Road are two storeys above basement. The elevations face square onto the street, but behind the plots the boundaries crank at 45° to create longer gardens and greater privacy.

The houses contain half-landing staircases dividing front and back rooms, with ground-floor bedroom and kitchen, first-floor living room, bathroom and bedroom, and in the larger houses a second-floor bedroom with rear terrace. Each basement flat occupies the full width of two adjacent plots without extending to the rear, where instead the house stairs descend to basement level with a further bedroom and garden access.

The terrace is composed of symmetrical pairs in brown brick with shared gable parapets crowned by crow-stepped cast stone coping. The central bays project at ground and first floors, finished with a slate-clad gable-end and projecting red-brick party wall with white-painted cast stone coping. These projections feature gridded blue-painted timber walls containing blue front doors, windows and small square spandrel panels of opaque white and blue glass. Upper-floor windows extend over the brick side walls, creating square glazed sitting-room bays at first floor. The flanking casement windows to the upper-ground floor have round-headed glazing set under square heads, with triangular patterns of red bricks replacing lintels (also found over the second-floor windows in larger houses). First-floor windows are narrow single-light casements.

To the rear, the elevations have a saw-tooth effect from the angled plots. Each house has blue-painted French doors at ground and first floors opening to gardens and raised terraces respectively, fitted with glazed balustrades. The taller houses have a second terrace on the top floor. The gardens are divided by brick walls as part of the original scheme, though end boundaries appear to be later and ad hoc.

The corner block of flats has a straight parapet with a pyramidal roof behind, turning the corner with a large square bay with a red-brick triangular pier at its centre.

The dwellings are accessed by straight external steps leading half a storey down to basement flats and up to houses, separated by a brick balustrade with cast stone coping. Blue-painted steel railings to the stairs and around raised entrances echo the timber gridwork of the projecting bays. Low brick boundary walls have gate piers with pyramidal caps (a humorous reference to the Dixons' Northamptonshire County Hall scheme). The gate piers are hollow with timber doors to the rear serving as bin stores. The boundary wall curves inward at the flat entrance off St Mark's Road, a treatment that allowed retention of two pre-existing London Plane trees. The corner block boundary wall has cylindrical piers.

The garden party walls and those behind Cowper Terrace are original to the scheme. The interiors, while refitted, retain their original floor plans.