Decorating Cambridge Terrace

Cambridge Terrace was designed by John Nash and completed in 1825, taking its name from the Duke of Cambridge, one of the younger sons of King George III. The terrace was one of the later additions to the eastern perimeter of the park, filling a gap in the continuous ring of stuccoed facades that Nash envisaged as the park's architectural frame. Comprising just six houses, it is among the smallest of the Regent's Park terraces, though its architectural ambition is in no way diminished by its modest scale. The facade is unified by a central feature of paired Ionic pilasters supporting a full entablature and blocking course, with the flanking bays treated in plain ashlar stucco with moulded window surrounds. The terrace was built for the upper-middle-class professional market and has maintained a residential character throughout its history, avoiding the institutional and commercial conversions that have affected some of the larger terraces. The Crown Estate retains the freehold and manages the terrace's conservation under its comprehensive maintenance programme. The terrace escaped serious war damage and retains a high proportion of its original early nineteenth-century fabric, including substantial areas of original lime stucco, Roman cement enrichments, and Regency timber joinery, making it one of the most authentic surviving elements of Nash's park scheme.

The conservation painting of Cambridge Terrace benefits from the terrace's high proportion of original fabric, which provides extensive reference material for the calibration of repair mortars, coating colours, and surface textures. However, this same authenticity places a premium on the precision and sensitivity of conservation interventions, as any inconsistency between repairs and original fabric will be immediately apparent across the terrace's limited facade area. The pre-painting survey should include a detailed photographic record of existing surface conditions, percussion testing to map areas of sound and hollow stucco, and micro-sampling of paint layers to establish the terrace's decorative history and identify the original Regency colour scheme. Where modern coatings have been applied in previous maintenance cycles, their compatibility with the underlying lime stucco should be assessed: if they are silicate-based, they may be retained as a sound foundation for the new finish; if they are acrylic or vinyl-based, their removal is essential. Stucco repairs must be executed with exceptional care, using a lime mortar matched to the original through petrographic analysis of aggregate type, particle size distribution, and binder composition. The repair mortar should be applied in thin layers, each allowed to carbonate before the next is applied, and the final surface texture should replicate the smooth, trowelled finish of the original ashlar render. Roman cement enrichments, where requiring repair, should be rebuilt using authentic Roman cement where profiles are significantly eroded, or consolidated with nanolime and shelter-coated with limewash where surface deterioration is less severe. The finish coating should be a potassium silicate mineral paint applied in two coats, with colour specification derived from spectrophotometric analysis of the earliest surviving paint layer and cross-referenced with the Crown Estate's approved palette. The small scale of the terrace means that the entire facade can be painted in a single campaign, eliminating the colour consistency challenges that arise when larger terraces are painted in phases over extended periods. Timber joinery should be maintained using the standard linseed oil and alkyd system, with particular attention to the mahogany entrance doors, which require a specialised finishing schedule using teak oil or yacht varnish to enhance the natural grain.