Tight mixed-use buildings dominate. Freehold houses that control subsoil are the exception; most enquiries are flat refurbishments under freeholder packs, not digs.
Westminster basement Article 4 applies in a night-time economy setting. Lightwells (where any court exists) need full householder evidence — not a residential-terrace package from Pimlico or Mayfair.
Lease and freehold demises are the first Soho drawings. Without subsoil control we stop dig briefs immediately and redirect to Licence to Alter.
Under a Soho house, ground conditions are established by trial pits and boreholes on this plot — not by a finished basement two streets away — because made ground, groundwater and foundation depths drive retaining design, waterproofing grade and neighbour movement predictions here.
Restaurant, office and entertainment neighbours drive noise, servicing and 24-hour construction constraints. Awards and method notes are written for that adjacency.
Below the existing drainage invert of a Soho house, waterproofing is designed to BS 8102 with dual protection and pumped discharge; pumps need power, backup and lifelong servicing so rooms stay usable rather than merely dry.
Courts are scarce and often shared with commercial servicing. Daylight and guarding are designed for real adjacency, not an under-garden cinema diagram.
Almost never a flat dig. Ownership first always — reconfiguration the lease allows usually beats excavation fees in Soho.
Soho freehold dig stock is rare: tight mixed-use buildings, commercial neighbours and 24-hour night-time economy constraints kill more digs at title than soil conditions.
Servicing, waste and restaurant extract adjacency mean temporary works and construction hours are freeholder and neighbour risk items before any cinema-room layout is sold.
Compared with Mayfair villa digs or Covent Garden tourist-core courts, Soho more often redirects to Licence to Alter flat reconfiguration because subsoil is not controlled.
Soho programmes: freehold rarity → lawful-use and mixed-use neighbour map → 24-hour construction constraints → lightwell (if any court exists) → Westminster basement evidence. Almost never a default dig brief.
Narrow streets and shared entrances force spoil and steel sequencing that a wide Pimlico avenue dig does not face.
We refuse to import a residential-only terrace dig package onto a Soho pin with restaurant or office adjacency until ownership and use history are proven.
A Soho client pack that unlocks design is freehold proof, lawful-use and neighbour map, and construction-hour assumptions for night-time economy streets — not a Mayfair villa dig checklist.
Restaurant extract, waste and late-night servicing adjacency are written into temporary-works notes before any cinema-room layout is sold as diggable under Westminster basement Article 4.
Compared with Fitzrovia commercial-edge digs, Soho more often fails on 24-hour neighbour constraints and freehold rarity than on Georgian terrace dual flanks alone.
A Soho basement package is sequenced as survey, investigation, structure, Westminster drawings, party wall mapping and building regulations — approval is never promised; the goal is to remove avoidable refusal and neighbour deadlock. Clients should expect a longer pre-construction period than for a simple rear extension, and most digs are easier with the house empty for part of the works.
