Portsmouth · Air conditioning installation
Air conditioning installation in Cosham, Portsmouth
One call covers supply, installation and commissioning of air conditioning for homes and businesses, from one room to a whole building in Cosham: diagnosis, fixed price, work and sign-off. An F-Gas certified company, NICEIC approved, on Checkatrade.
- Portable units that are noisy and barely cope
- An office, shop or restaurant that’s uncomfortable for staff and customers
- An ageing air conditioning system near the end of its life
When something else is needed
We’d rather tell you now than sell you work that won’t help, so these are the things it will not cover:
- Damp or condensation caused by leaks or poor ventilation in the building (that needs the cause fixing)
- An installation that needs consent nobody has given yet
- Heat loss through very poor insulation (a system will heat the room, but insulation is a separate job)
If you’re not sure, just phone us on 07833 053749 or drop us a line and we will give you a straight answer.
What the work covers
- Multi-split systems
- Ducted systems
- Air-to-air heat pumps
- VRF systems
- Wall-mounted split systems
- Ceiling cassettes
Air conditioning in Cosham
Across Cosham, every installation follows the same steps: a site survey, or photos for simple jobs, then a fixed-price quote, the installation, commissioning and F-Gas records. The price is fixed up front and the records are handed over at the end. Modern air conditioning heats as well as cools: the Energy Saving Trust notes that air-to-air heat pumps are sometimes called air conditioning, so a system bought for summer earns its keep in winter too.
Sizing is where cheap installs go wrong: we look at the room’s size, windows, insulation and use before choosing a unit.
In a smaller place like Cosham, most installs are in houses and cottages, often with gardens, which typically leaves room for an outdoor unit. The wall type and how the electrics reach the unit are often the main things to check.
If a fault appears while the equipment is under the manufacturer’s warranty, tell us the make, model and installation date. We’ll tell you how the manufacturer’s warranty is likely to apply before any chargeable work goes ahead.
- Location
- Cosham (PO6, PO3, PO2)
- Region
- Portsmouth
- Pricing
- Fixed, in writing
- Credentials
- F-Gas certified company, NICEIC approved
- Costs
- £1,200–£2,200 + VAT for one room
- Phone
- 07833 053749
- Checked
- 30 October 2026
Your questions about air conditioning in Cosham
Will air conditioning in Cosham need planning permission?
The answer turns on the property and where the outdoor unit would sit. The half-mile around the middle of Cosham holds about 5 listed buildings and structures. Permitted development only covers heat pumps that aren’t used solely for cooling, and not within the grounds of a listed building. Conservation areas add limits on outdoor units facing a road. Where needed, we check with the planning department at Portsmouth council, typically the authority for Cosham.
Does being near the sea make a difference to air conditioning in Cosham?
It can, as Cosham is within about 1 mile of the sea, where salt in the air is hard on coils and fixings. The outdoor unit position, its fixings and regular servicing all help near the sea.
Does air conditioning need its own electrical supply?
In most cases, yes: a dedicated circuit is needed. Adding a new circuit is notifiable building work under Part P unless it’s done by a registered competent person, and as NICEIC approved contractors we install and certify it as part of the job.
Which brands do you work with?
We work with the leading brands, from Mitsubishi Electric, Daikin and Fujitsu to Panasonic, Toshiba, LG, Samsung, Mitsubishi Heavy Industries and Hitachi. Tell us the make and model and we’ll take it from there.
Can you look at a system you didn’t fit?
Yes. We look at it first and tell you what we find, including any issues with how it was fitted. Any work is priced before it goes ahead.
Do you protect the property while you work?
Protection goes down first: dust sheets over floors and anything close to the work. Any drilling is agreed with you first, and we clear up the dust and offcuts when we finish.
Is air conditioning possible in a flat?
It depends on the building and the lease. Balconies, flat roofs and rear walls can all work, subject to consent, and we check the options on the survey. This is general information, not legal advice.
What we are called out for in Cosham
Commercial spaces gain heat from people, equipment, lighting and glazing. Keeping staff and customers comfortable is typically what prompts the call, and some rooms need cooling for the equipment as much as the people.
Keep an eye out for any of the following:
- Bedrooms and offices that overheat in summer
- Working from home in a room that gets too warm
- A system on old refrigerant that’s due for replacement
Around Church of St Philip, a quick check of the listing and conservation maps is part of planning any install.
What to look for in a quote
- If the quote is based on a survey, pictures or a diagnosis
- Whether testing, commissioning and paperwork are included
- The make and model of any parts or equipment being quoted
Owner checks or an engineer?
Write down what you notice: error codes, noises, drips, smells or a drop in performance. It makes our diagnosis quicker, and a photo of the display helps even more.
Refrigerant is off limits for anyone without the right qualifications. The law requires anyone working on equipment containing F gas to hold the right qualifications, and the company to be certified, and escaping refrigerant can cause cold burns. If you suspect a leak, switch the system off and call us.
Homes in Cosham and air conditioning
Cosham is within about 1 mile of the coast. Near the sea, outdoor unit position matters more: sheltered from salt-laden wind where possible, on fixings that won’t rust. About 48% of homes in Cosham and the neighbourhoods around it were built between the wars, according to the Valuation Office Agency’s council tax figures. We check the wall construction on homes of that age, as it decides how the pipework goes through.
With historic houses such as Warblington Castle about 4.4 miles east, it’s a reminder that older homes nearby may be listed, which changes the planning rules.
Cosham is about 2 miles south-west of Purbrook, in Portsmouth. If you need air conditioning in Cosham, it’s easy to get a fixed-price quote: please call 07833 053749 or write to us at info@aircondoctor.co.uk. We work across London and the South East, including Cosham. Our Portsmouth coverage runs to 19 places, and Cosham is one of them. The nearest of our city pages is Worthing, around 29 miles from Cosham.
The closest recent job we can point to from Cosham was on East Street, Chichester (PO19), about 12 miles east: installing a Daikin wall-mounted unit in the dining area and a second unit serving the kitchen pass area. More about it
Jobs in PO6, PO3 and PO2 are looked at, quoted and booked the same way as anywhere else. Getting to Cosham is easy by the A397. We also cover Wymering (1 mile north-west), Hilsea (1 mile south), Drayton (1 mile east), Widley (1 mile north-east) and Paulsgrove (1 mile west). Further out, we also cover Southsea (4 miles south), Milton (3 miles south), Landport (3 miles south) and Portsea (3 miles south-west).
Local landmarks in Cosham
Locally, jobs take us to houses, flats and workplaces close to The First Post pub, Alexandra Park and Springfield School, among other places. There’s a railway station in Cosham itself: Cosham station. A little further out are Tricorn Centre (2.9 miles south) and World War I Remembrance Centre (1 mile south-east). Open spaces near Cosham include Southmoor Nature Reserve and Portsdown Hill.
The process
Protection comes first: sheets over the floor and any furniture nearby, and we ask before moving anything. Then the electrics are made safe and the work begins. It takes a day for most single-room installations, with multi-split, ducted and cassette systems taking longer, and we tidy up before we leave. We plan the visit to Cosham from the survey or your photos.
- You send pictures, or we visit and survey the rooms and outside.
- Output, positions and price are settled before anything is booked.
- We protect the area, then fit both halves of the system.
- We run and connect the pipes, cable and drain, then pressure test and evacuate the circuit.
- It’s switched on, checked and handed over with its records.
Preparing for the visit
- Keep pets out of the rooms we’re working in
- Make sure we can reach the outdoor unit, or where it will go
- Make sure someone can let us in at the agreed time
How to get a quote
Every quote shows the VAT clearly, with the rate that applies to your job. VAT can differ between homes and businesses and between kinds of work, so we confirm it on the quote. For a fixed-price quote, ring 07833 053749 or use the quote form.
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What a customer said
“Office air con broke down in the July heatwave. Called at 8am, engineer was here by noon and fixed within 2 hours. Brilliant emergency response. They now hold the service contract for the whole building.”
James T., Crawley, office manager