Indoor air quality surveys in Greater London

An indoor air quality survey measures how fresh and how damp the air in a building really is, over days rather than minutes. We place loggers that record CO2, humidity and temperature (and particulates in workplaces), then explain what the readings mean and what ventilation changes would help.

We carry out indoor air quality surveys across Greater London, including Westminster, Bexley, Barking, Archway and Sutton. Prices use London rates. This is a charged visit. We confirm the cost in writing before we book it.

Air quality surveys in Greater London at a glance

Area: Greater London
Towns listed: 216, largest Brent
Postcode districts: W9, W10, E4, E17, HA5 and HA6
Price region: London
Survey: Charged visit, price agreed first

What the work involves

CO2 is a practical indicator of whether a room is getting enough fresh air for the number of people in it: levels that climb steadily through a meeting or a night in a bedroom point to under-ventilation. Humidity readings show whether moisture is being removed or lingering long enough to cause condensation and mould. Surveys are useful before spending money: they show whether a problem is constant or happens at particular times, which rooms are worst, and whether an existing system is doing its job.

Home survey

Loggers in bedrooms, living areas and wet rooms for 7 days, with a written summary.

Workplace survey

CO2, humidity, temperature and particulates in offices, classrooms or meeting rooms.

Before and after

Readings taken before and after a ventilation upgrade to show the difference.

Guide prices in Greater London

Indoor air quality surveys guide prices in Greater London
Work	Guide price
Home air quality check: CO2, humidity and temperature logged for 7 days (per home)	£175–£295 inc VAT
Workplace air quality survey: CO2, PM2.5, humidity, 7 days logged, written report (per survey)	£600–£1,425 + VAT

These ranges use our London rates. Home prices include VAT at 20%; business prices exclude VAT. You get a fixed written price before any work is booked.

Signs it is time to call us

You want evidence before spending money on ventilation
Staff complaints about stuffiness
A new ventilation system that does not feel right

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). Employers have a separate duty under the Workplace Regulations 1992 to provide effective and suitable ventilation.

How the job runs

Plan
Place loggers
Log
Analyse
Report

Towns we cover in Greater London

Questions about indoor air quality surveys in Greater London

Which towns in Greater London do you cover?

All of Greater London, including Westminster, Bexley, Barking, Archway and Sutton. If your town is not listed, send the postcode and we will confirm.

What humidity should a home be?

Relative humidity of roughly 40 to 60 percent is comfortable for most homes. Readings that sit above 70 percent for long periods make condensation and mould much more likely.

How much does an air quality survey cost?

A home survey costs £145 to £245 including VAT, and a workplace survey £495 to £1,195 excluding VAT, depending on the number of rooms.

Are prices different in Greater London?

Our guide prices are adjusted by region. In Greater London we use London rates, so home air quality check: CO2, humidity and temperature logged for 7 days is typically £175 to £295 inc VAT per home.

Is the survey free in Greater London?

This is a charged visit because it is servicing, testing or repair work. We tell you the cost before booking. Surveys for new installations on the UK mainland are free.