Commercial EWI · Greater London
Commercial and public building EWI in Barnet
Looking for commercial external wall insulation in Barnet? We survey homes across Barnet and the EN5 area, then give you a fixed written price before any work starts. For commercial premises in Barnet, we programme the work around opening hours so the building can keep trading.
- Free survey in EN5 and nearby
- Guide price from £110 per m² + scaffold, + VAT
- Fixed written price before work starts
Free survey in Barnet
Postcode, service and a phone number is all we need.
What's included
- Planning applications supported with drawings and finish samples
- Colour and texture options to suit brand or setting
- Contract roles under CDM 2015 agreed at the start
- Programmes phased around opening hours and term dates
Local considerations in Barnet
We also cover Potters Bar and Borehamwood, close to Barnet. London's housing includes a large stock of Victorian and Edwardian solid-wall terraces, inter-war semis and post-war blocks, and conservation areas cover many streets — so planning is often the first question for external work.
Much of Greater London 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.
Schools and community buildings around Barnet are usually phased by elevation, with noisy stages in holidays where possible.
- Postcode district
- EN5
- County or area
- Greater London
- Nation
- England
- Nearby
- Potters Bar, Borehamwood, Finchley, Muswell Hill
Planning and building control in England
For a house in Barnet, 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.
Insulating or re-rendering more than half of a wall's area brings in Part L of the Building Regulations, so building control is notified and the wall is upgraded to about 0.30 W/m²K where practical.
On residential buildings with a storey 11 metres or more above ground, guidance points to non-combustible external wall materials, and combustible materials are banned in relevant buildings 18 metres and over, so we specify mineral wool systems there.
Does commercial EWI need planning permission?
Generally yes — permitted development rights for external wall changes are written for houses. Applications need elevations showing the projection, finish and colours, and details at eaves and openings.
Commercial and public building EWI prices in Barnet
| Item | Guide price | Notes |
|---|---|---|
| Insulated render system | £110–£200 per m²+ VAT | Priced on survey |
| Render refurbishment without insulation | £55–£95 per m²+ VAT | Silicone or mineral |
| Access and scaffold | Per building | Includes edge protection |
Confirmed by a fixed written quote after survey. Business prices shown before VAT, which is added at 20%. Buildings used solely for a relevant charitable purpose can qualify for 0% on insulation.
From enquiry to finished wall
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Commercial EWI in Barnet: questions
Do you handle the planning application?
We provide the technical information, drawings and samples an application needs; your agent or our designer can submit it.
Is VAT 0% on commercial insulation?
Usually not. The zero rate covers insulation installed in residential accommodation and, since 1 February 2024, buildings used solely for a relevant charitable purpose, such as many charity-run village halls. Other commercial work is standard-rated.
Do you provide a maintenance plan?
Yes — the handover includes the system documents and recommended inspection and cleaning intervals.
Do you cover Barnet?
Yes — we survey and quote commercial external wall insulation in Barnet (EN5) and nearby Potters Bar, Borehamwood and Finchley, with a fixed written price before any work starts.