Areas · England

Render and insulation in Hertfordshire

Insulate, re-render or repair walls anywhere in Hertfordshire, with guide prices online and a free survey.

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Services

Services in Hertfordshire

External wall insulation

Solid and internal wall insulation

Render finishes

Re-rendering, repairs and upkeep

Homes and walls in Hertfordshire

The East of England has a mix of post-war estates, inter-war semis and older solid brick and flint cottages, with some system-built council homes on post-war estates.

Much of Hertfordshire sits in the lower wind-driven rain exposure bands, which keeps the choice of finishes wide — though hilltop, coastal and exposed gable walls can still need a tougher specification, so we check the actual site.

Nation: England
Region: East of England
Towns with local pages: 16

Planning and building control in England

For houses, external wall insulation and render are often permitted development where the finish looks similar to the existing walls. Planning permission is usually needed in conservation areas, National Parks, National Landscapes, the Broads and World Heritage Sites (where cladding a house in stone, artificial stone, pebble dash, render, timber, plastic or tiles isn't permitted development), for flats and maisonettes, for commercial buildings, under an Article 4 direction, or where the look changes noticeably. Listed buildings need listed building consent.

Renovating more than half of a wall's area — insulating it, or stripping and re-rendering it — or more than a quarter of the building's whole external envelope brings in the energy requirements of Part L, so building control needs to be involved and the wall should reach about 0.30 W/m²K where that's technically, functionally and economically feasible.

Typical jobs and guide prices

Item	Guide price	Notes
Covering pebble dash	From £72 per m² + scaffoldinc VAT	Render over sound pebble dash
Silicone render	From £66 per m² + scaffoldinc VAT	Silicone render on masonry (with base coat + mesh)
Render cleaning and treatment	From £10 per m²inc VAT	Soft wash and biocide
Mineral wool external wall insulation	From £125 per m² + scaffold0% VAT	Mineral wool + mineral or silicone render

Insulation prices for homes are totals (0% VAT until 31 March 2027); render and repair prices include VAT at 20%. Confirmed in writing after a free survey. Full price guide

Towns in Hertfordshire

Hertfordshire: questions

Do you work across all of Hertfordshire?

Yes — we survey and quote across Hertfordshire, including Watford, Stevenage, Hemel Hempstead, St Albans, Welwyn Garden City, Cheshunt.

Do I need planning permission for external wall insulation in Hertfordshire?

For a house in Hertfordshire, external insulation or render is often permitted development if it looks similar to the existing walls; conservation areas, flats, commercial buildings and listed buildings need permission or consent, so we check your address first.

Are there grants for wall insulation in England?

ECO4 runs until 31 December 2026 for eligible households, and some councils run Warm Homes: Local Grant schemes. The Warm Homes Plan sets out further grants and low-interest loans being introduced in phases.