House
refurbishment
in St Albans, AL1

Section 55 of the 1990 planning Act treats purely internal alterations as falling outside development, so most internal refurbishment needs no planning application. A listed building is the exception. Policy HE1 of the Local Plan supports works that relate sensitively to the period and architectural detail of the building, and the council's guidance says listed building consent will almost always be required to alter its windows or doors, though not normally to repair them.

For an ordinary house outside an Article 4 area, the same guidance treats new windows or doors as permitted development where the materials are of a similar appearance to the existing ones and no condition on an earlier permission has taken those rights away. It names Sopwell Lane and Fishpool Street as two of the largest conservation areas where Article 4 directions change that, and the Fishpool Street character area is largely covered by one.

On Cunningham Avenue the direction is unusually wide. It brings replacement windows and doors, glazed panels in place of wooden door panels, new openings, exterior painting, and solar panels or heat pumps under planning control, although a window or door identical in design, material, frame colour and opening to the one it replaces needs no permission.

Relevant demolition in a conservation area needs planning permission, which can matter when a refurbishment takes down a rear outbuilding or a garden wall. Every locally listed building in the district stands in a conservation area, and for those the council looks at whether proposals use appropriate materials and keep features of architectural or historic interest.

Sources: legislation.gov.uk (The National Archives): Town and Country Planning Act 1990, section 55 (meaning of development); St Albans City and District Council: St Albans Local Plan Part A (adopted 9 September 2026); St Albans City and District Council: Repair or Replacement of Windows and Doors (guidance leaflet); St Albans City and District Council: St Albans Conservation Area Character Statement, Fishpool Street and St Michael's Village (character area 4c); St Albans City and District Council: Cunningham Avenue Article 4 Direction (leaflet); St Albans City and District Council: Conservation areas (web page); St Albans City and District Council: Locally listed buildings (web page)

The council asks owners to consider careful repair before replacement wherever historic detail or good materials survive. Where sashes must go, it wants vertical sliding sashes in their place, set back in the opening as the originals were rather than flush with the wall face, and it points out that double glazing usually needs thicker glazing bars, so a double-glazed copy is not an exact one. Fishpool Street's historic windows are all wooden, some of them pegged casements holding a lot of older glass.

Roof coverings are where much of the city has already changed. Albert Street's roofs are slate apart from a few changed to concrete, a change the Article 4 direction now controls; on Liverpool Road about half of the slate has gone to concrete tiles; and on Cunningham Avenue artificial slates and concrete tiles are not accepted in place of real slate and clay tiles. Under the building regulations, replacing roof coverings on pitched or flat roofs may itself need approval.

Walls need the most care. White-painted plaster render over timber framing dominates the historic fronts of Fishpool Street, and the Local Plan warns that traditionally built houses have their own technical requirements and that unsuitable retrofitting can cause long-term problems. Policy HE8 supports energy improvements to heritage assets and houses in conservation areas where they do not compromise the building through inappropriate interventions, including by aggravating long-term deterioration.

In practice that means we specify insulation, linings and paints that let a solid or timber-framed wall dry out, check where moisture is coming from before covering anything up, and record each opened-up area with photographs before it is closed again.

Sources: St Albans City and District Council: Repair or Replacement of Windows and Doors (guidance leaflet); St Albans City and District Council: St Albans Conservation Area Character Statement, Fishpool Street and St Michael's Village (character area 4c); St Albans City and District Council: St Albans Conservation Area Character Statement, Holywell Hill and Sopwell Lane (character area 4d); St Albans City and District Council: St Albans Conservation Area Character Statement, Victoria Street (character area 7c); St Albans City and District Council: Cunningham Avenue Article 4 Direction (leaflet); GOV.UK: Building regulations approval (printable guide); St Albans City and District Council: St Albans Local Plan Part A (adopted 9 September 2026)

Most of the city still heats with gas: in the 2021 Census, 2,544 of the 3,180 households in Clarence ward and 2,637 of the 3,098 in Verulam used mains gas alone. Building regulations approval may be needed for a new or replacement heating system, or to change a fuse box together with the electrics connected to it, unless the installer is registered with a competent person scheme and certifies the work.

Draughts are often cured without new windows. The council's leaflet suggests secondary glazing as effective insulation and says most heat is lost around the edges of opening sections, which draught-proofing can largely stop. Replacement windows and external doors have been under building regulations control since 2002, either through approval or a registered installer, but replacing only the glass in a frame is not controlled.

Taking a chimney breast out of a party wall needs notice to the neighbour, while plastering, new sockets or fixing shelves and cabinets to that wall do not. We prepare any notices with the drawings.

Sources: ONS / Nomis: Census 2021 TS046 central heating, ten St Albans city 2022 wards; GOV.UK: Building regulations approval (printable guide); GOV.UK: Building regulations approval - when you need approval; St Albans City and District Council: Repair or Replacement of Windows and Doors (guidance leaflet); GOV.UK: Party walls and building work (printable guide)

Our London team, in-house architects, designers and structural engineers working alongside Hampstead Chartered Surveyors & Building Consultancy, takes on house refurbishments in St Albans. Any planning or listed building application goes to St Albans City and District Council, and the building regulations side is handled by the St Albans and Watford shared building control service or by a private registered building control approver, so that you hold the completion certificates a buyer's solicitor will later ask for.

We start with a measured survey and a condition report on roof, walls, windows, floors and services, then set out a schedule that separates repair from renewal, so the effect of each choice is clear to you.

On site, rooms are stripped and protected in a planned order, first fix is inspected before walls are closed, and floors, stairs and joinery that stay are boarded over until the finishing trades arrive.

Outside St Albans, and in London rather than Hertfordshire: Project example: Belsize Park, NW3. That project of ours is a Victorian townhouse on five storeys whose owners wanted the whole interior refurbished, together with basement, extension and loft work, as its case study records.

Sources: St Albans City and District Council: Building control (web page); GOV.UK: Building regulations approval (printable guide); Hampstead Renovations: Belsize Park Gardens, NW3 case study