Portland stone, Grade II-preserved (1905 façade)

Editor note

The 1905 Portland stone façade of 45 Old Bond Street, previously De Beers London. Grade II-listed, preserved essentially intact under [Historic England consent](https://historicengland.org.uk/advice/hpg/has/listed-buildings/). Queen Anne-style composition — rhythmic window bays, roofline, fenestration all protected. Any alteration requires consent. For Ferrari Style London, the envelope is a starting condition, not a design variable. The storefront glazing is edged in dark steel with brassy gunmetal tones to contrast the light Portland stone — a restrained modification at street level that leaves the building's heritage legible. Unlike [Nash-era stone at 314 Regent Street](/materials/nash-stone-grade-ii), Portland stone is specifiable as new-build material: the Isle of Portland (Dorset) is the canonical source. The two long-standing Isle of Portland quarry-and-supply firms are Albion Stone (mining since 1984; supplier of record for the Commonwealth War Graves Commission's Portland Basebed) and Portland Stone Firms Ltd (five quarries — Coombefield, Perryfield, Broadcroft — across a 680-acre estate). This entry is specifically about heritage preservation as architectural argument at the 45 Old Bond Street site, not contemporary sourcing — but a UK specifier reaching for new-build Portland would route through one of those two.

Specification notes

• 1905 Queen Anne-style Portland stone building
• Grade II-listed; Historic England consent framework
• Previous occupant: De Beers London
• Adjacent storefront glazing: dark steel and brassy gunmetal surround (new)