The Ban on Amalgamation (Deconversion)

1. The Housing Target Conflict

A highly lucrative real estate strategy in the London Borough of Hammersmith & Fulham (LBHF) involves "Deconversion" (or amalgamation). This is the process of purchasing three dilapidated flats within a single Victorian building and converting them back into a single, massive luxury townhouse. However, this strategy is aggressively fought by the LBHF Local Plan.

2. The Loss of Council Tax Revenue

The council is under intense government pressure to deliver new housing units. Deconversion physically destroys housing stock (turning three units into one). LBHF frequently refuses these planning applications arguing that it robs the borough of necessary housing and reduces the council tax base.

Defeating this objection is incredibly difficult. Our Planning Directorate must generate highly complex "Housing Need Assessments," attempting to prove to the council that the existing flats are fundamentally substandard (e.g., they fall below national minimum space standards) and that a single family dwelling is the only viable architectural future for the building.

3. The Pre-Commencement Strategy

Because deconversions are so politically sensitive, Hampstead Renovations advises clients never to exchange contracts on the three separate flats until we have secured formal planning permission for the amalgamation. Buying the flats first and assuming planning will simply rubber-stamp the return to a single dwelling is a multi-million-pound error.

4. Reinstating the Core

If permission is granted, the architectural reality of a deconversion is brutal. Decades of flat-conversion usually involved destroying the central staircase to fit new bathrooms. Re-engineering a continuous, compliant staircase from the Basement to the fourth floor, while meeting modern Building Control Part K regulations, often requires stripping the entire core of the building back to the brickwork.

How We Can Help

If you are considering a major refurbishment, extension or basement in Hammersmith & Fulham, our in-house architectural and construction teams are highly experienced with the specific constraints and policies of LBHF. Do not leave your planning application to chance—our Planning & Permissions and Architecture services are explicitly designed to handle strict London authorities from initial conceptual design through to final, legal consent.

Once permission is secured, our Refurbishment & Interiors division carefully manages the execution, guaranteeing the design integrity is maintained throughout the build phase.

*Published in the Hampstead Renovations Planning Guide Collection — delivering expert design and build strategies for London's most heavily guarded conservation boroughs.*