Indoor air quality surveys in Surrey

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.

Surrey has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

Air quality surveys in Surrey at a glance

Area: Surrey
Towns listed: 35, largest Woking
Postcode districts: CR3, CR6, KT13, KT15, KT7 and KT8
Price region: South East
Survey: Charged visit, price agreed first

What indoor air quality surveys 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.

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.

Spot checks

Readings taken during a single visit, where a quick answer is enough.

Guide prices in Surrey

Indoor air quality surveys guide prices in Surrey
Work	Guide price
Home air quality check: CO2, humidity and temperature logged for 7 days (per home)	£160–£270 inc VAT
Workplace air quality survey: CO2, PM2.5, humidity, 7 days logged, written report (per survey)	£550–£1,325 + VAT

Guide prices using South East rates. Home prices include VAT at 20%; business prices exclude VAT. A guide price is not a quote: we confirm a fixed price in writing first.

Common reasons people call

Staff complaints about stuffiness
A new ventilation system that does not feel right
A bedroom that feels stale in the morning

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 Surrey

Questions about indoor air quality surveys in Surrey

Are prices different in Surrey?

Our guide prices are adjusted by region. In Surrey we use South East rates, so home air quality check: CO2, humidity and temperature logged for 7 days is typically £160 to £270 inc VAT per home.

What is a good CO2 level indoors?

Outdoor air is around 400 to 450 parts per million; indoor levels that stay well below about 1,000 ppm usually indicate reasonable ventilation for the people in the room, while sustained levels much higher suggest it needs improving.

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.

Is the survey free in Surrey?

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.

Which rules apply to ventilation in Surrey?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.