What Is a Grade II Listed Building?

Grade II is the most common listing designation in England, covering approximately 92% of all listed buildings — around 370,000 individual entries on the National Heritage List for England. Grade II means the building is “nationally important” and “of special interest, warranting every effort to preserve it.”

Grade II buildings include a wide range of property types: Georgian townhouses, Victorian terraces, interwar semis of historic interest, industrial buildings, barns, and more. Being Grade II listed does not make a building uninhabitable or unalterable — it means alterations must be managed carefully to preserve the building’s special character.

LBC Still Required for All Works

Even for Grade II listed buildings — the most common and least restrictive listing — listed building consent is required for all works affecting the character of the building. This includes:

• All extensions and alterations (internal and external)
• Replacement of windows, doors, and other architectural features
• Works to curtilage structures built before 1948

There are no “permitted development” equivalents for works to the fabric of a listed building — LBC must always be sought.

What Typically Gets Approved

For Grade II buildings, LPAs are generally more willing to approve sympathetic, reversible works than they would be for higher-grade buildings. Works that are commonly approved include:

• Sympathetic extensions — particularly where they are single-storey, set back from the principal elevation, use recessive materials (brick or render to match), and read as clearly subordinate to the original building
• Replacement timber windows — including slim-profile double glazing where the design closely matches the original
• Modern kitchens and bathrooms — where the works are reversible and do not destroy original fabric
• Secondary glazing — an acceptable way to improve thermal performance without affecting original windows
• Reroofing in matching materials — replacing like-for-like where the covering is beyond repair
• New heating systems — where flues and pipework can be routed without significant loss of original fabric

What Typically Gets Refused

Even for Grade II buildings, certain works are almost never approved:

• uPVC windows or doors — incompatible with historic buildings; will be refused
• Cement repointing — damaging to historic masonry; lime mortar required
• Render over original brick or stonework — conceals and damages historic fabric
• Removing original features — fireplaces, panelling, staircases, plasterwork, cornices
• Large or prominent extensions — extensions that overwhelm the original building or are visible from the principal elevation
• Flat roof extensions on traditional buildings — often considered out of character, particularly on the front or side
• External insulation — alters the external appearance; internal insulation with breathable materials may be acceptable

Extensions to Grade II Listed Buildings

Extensions are the most commonly sought type of LBC. They are considered against the character of the original building and their impact on it. Factors the LPA will consider:

• Position — rear extensions are generally more acceptable than those visible from public viewpoints
• Scale — the extension should be clearly subordinate to the original building
• Materials — should complement rather than compete with the original; often matching or deliberately contrasting (a clearly contemporary glazed extension can work if well-designed)
• Reversibility — the LPA will want to know that the extension could be removed without damaging the original building
• Detail — junction between old and new should be carefully designed

Windows and Replacement Glazing

For Grade II listed buildings, the LPA’s approach to windows is typically:

• Repair preferred over replacement — original windows should be repaired wherever possible
• Like-for-like replacement — if replacement is unavoidable, it must replicate the original in design, material, and detail
• Slim-profile double glazing — may be approved in timber frames where it replicates the original sight lines
• Secondary glazing — almost always approved as a low-impact alternative to replacement
• uPVC — not acceptable

Modern Kitchens and Bathrooms

Modern kitchen and bathroom installations are generally permitted in Grade II buildings provided:

• No original fabric is permanently damaged (e.g. do not chase out original plaster for pipework if avoidable)
• Original features in the affected rooms (fireplaces, panelling, cornices) are retained
• The works are reversible — the LPA cannot require you to keep a 1970s kitchen, but will require that your new kitchen does not destroy 18th-century floor tiles

The Historic Environment Officer’s Role

Every LPA with listed buildings has a historic environment officer (sometimes called a conservation officer). This person:

• Assesses LBC applications and provides specialist advice to the decision-maker
• Is usually willing to give pre-application advice (sometimes free, sometimes charged)
• Has significant influence over the outcome — their recommendation is rarely overturned
• Can be a valuable ally if engaged early and constructively

Building a constructive relationship with the conservation officer and taking their pre-application advice seriously is the most effective way to achieve a successful LBC application for a Grade II building.

Permitted Development and Listed Buildings

Several permitted development (PD) classes are removed or modified for listed buildings:

• Class B (roof additions) — not permitted for listed buildings
• Solar panels — PD removed; planning permission required
• Satellite dishes — restricted
• Extensions under Class A — planning permission may still be permitted development for some works, but LBC is always required separately