Art as Interior Infrastructure: How Serious Collectors Build Homes Around Their Collections.

The relationship between serious art collecting and residential architecture has produced, over the past three decades, a distinct building typology: the private museum house. These are residences designed from the outset to accommodate, display, and conserve significant works of art, with spatial programmes, technical specifications, and construction details that differ fundamentally from those of a house that merely hangs some paintings on well-proportioned walls. The private museum house is not a recent phenomenon — the Villa Kérylos on the Côte d'Azur, the Frick Residence in New York, the Courtauld's former home in Portman Square — but its contemporary incarnation, influenced by the scale and ambition of contemporary art practice and the extraordinary financial resources available to leading collectors, represents a new category in both residential architecture and institutional museum design.

The technical requirements of a serious collection begin with climate. Major works on paper, textiles, and some categories of photography require a relative humidity maintained at 50 percent ± 5 percent and temperatures between 18 and 22 degrees Celsius, with changes occurring at a rate of no more than 2 percent per hour. These requirements are achievable in any well-specified building with the correct HVAC design, but they impose costs — in terms of both the quality of the mechanical plant and the ongoing energy consumption — that must be factored into any project that intends to house museum-quality works in a private residence. The typical additional cost for a residence designed to museum-standard climate control, relative to conventional luxury specification, is 8–12 percent of total build cost for a new building and 15–20 percent for a retrofit, depending on the complexity of the existing building envelope.

Lighting is the second critical technical infrastructure. The conservation standard for light-sensitive works (works on paper, watercolours, photographs, dyed textiles) is 50 lux maximum illuminance and no ultraviolet radiation whatsoever — a standard that is incompatible with natural daylight in most configurations. Galleries designed to house such works use north-facing clerestory glazing with UV-filtering glass, supplemented by artificial sources calibrated to the specific colour temperature preferred by the collector and the artist (or their estate). For non-light-sensitive works (oil on canvas, most sculptures, most ceramics and glass), higher illuminance levels are acceptable, and the design of the lighting becomes primarily aesthetic — a question of how the work is seen rather than merely a question of whether it is conserved.