What listing actually means for your project
When a building is listed, every part of it is protected by law, inside and out. Grade I covers buildings of exceptional interest, around 2.5 per cent of all listed buildings in England. Grade II* covers particularly important buildings, and Grade II covers the vast majority, including much of the Georgian and Victorian housing stock across Kensington, Chelsea, Westminster and Mayfair.
The listing covers the whole building, not just the facade. Internal joinery, staircases, plasterwork, fireplaces, roof structures and even later additions can all be protected. This is the single most misunderstood point we encounter: owners often believe listing only applies to what can be seen from the street. It does not.
Any work that affects the character of a listed building requires listed building consent from the local planning authority, in addition to any planning permission or building regulations approval. Carrying out unauthorised work on a listed building is a criminal offence, and local authorities can require work to be reversed at the owner's cost.
Consent before construction
Every Ushii heritage project begins long before anyone steps on site. We work with conservation officers, heritage consultants and, where required, Historic England to agree a scope of work that respects the building's significance while delivering what the client needs from it.
This stage produces a heritage statement, detailed drawings and a method statement for every element of the work. On a recent roof restoration to a Grade II listed diplomatic building in central London, the consent process specified the exact clay tile, the lime mortar mix, the lead code for the valleys and the pointing profile for the brickwork. Nothing was left to interpretation on the scaffold.
Handled properly, consent is not an obstacle. It is the framework that protects the client, the building and everyone working on it.
Like for like materials and traditional craft
Listed building work is built on the principle of like for like repair: matching the original material, method and detail as closely as possible. In practice this means hand cut clay plain tiles rather than machine made substitutes, lime mortar rather than cement, leadwork dressed by hand to code 5 and code 6, and joinery replicated from the original profiles.
These materials behave differently to modern equivalents. Lime mortar allows a wall to breathe and move; cement traps moisture and forces it into the brick or stone, where it causes decay. Getting this wrong on a listed building does not just fail inspection, it actively damages the fabric you were appointed to protect.
All of our heritage work is carried out by our own directly employed trades: bricklayers, carpenters, roofers and lead workers who do this every week. The person pricing the job is the person responsible for the people building it, and the same team stays on the project from scaffold to handover.
The works we carry out on listed buildings
Roof restoration is one of the most common instructions: stripping and re-laying clay plain tile and slate roofs, cutting hips and valleys by hand, renewing lead flashings, and repairing chimney stacks and parapet brickwork. On listed buildings these repairs are typically agreed tile by tile with the conservation officer.
Beyond the roofline we deliver whole house refurbishments within listed envelopes, structural repairs to timber frames and masonry, restoration of cornices, mouldings and original joinery, discreet installation of modern services, and basement and extension work where the local authority will support it.
The common thread is reversibility and respect. Where new work is permitted, it should be legible as new without pretending to be old, and it should never compromise the ability of a future generation to understand or restore the original building.
Programme, access and neighbours
Listed buildings in prime London rarely sit in isolation. Party walls, conservation area controls, restricted working hours and neighbours with their own expectations all shape the programme. Scaffold design often has to protect the public highway, neighbouring roofs and sometimes the building's own delicate elevations at the same time.
We plan access, protection and phasing as carefully as the construction itself. Temporary roof canopies keep the building weather tight through a strip and re-tile, dust and vibration are monitored where finishes are sensitive, and every decision is recorded so the client has a complete handover record of what was done, where, and with what material.
Thinking about work to a listed building?
If you own or manage a Grade I, Grade II* or Grade II listed property and are considering a refurbishment, roof restoration or extension, the best first step is a conversation before anything is designed. We can walk the building, advise on what consent is likely to require, and give you an honest view of programme and cost.
Speak to our team through the contact page and we will arrange a site visit with a director.