Greater London · Air conditioning installation
Air con installers in Lewisham
Air conditioning across Lewisham and nearby, from a site survey or diagnosis to sign-off and a fixed price agreed before we start.
- Expensive direct electric heating
- Commercial rooms that are too warm for staff
- A portable unit with a hose out of the window
Lewisham: your questions answered
Can you fit air conditioning in a London flat in Lewisham?
Usually, yes, though leaseholders normally need the freeholder’s agreement. We look at where the outdoor unit could go, such as a balcony, flat roof or rear wall, and write it up for the freeholder or agent.
Do you cover Lewisham for air conditioning?
Yes. We work across London and the South East from our base in East Grinstead, and Lewisham is part of that. Just phone 07833 053749 or use the quote form with a few details.
How long does air conditioning installation take?
Most single-room systems take a day. Multi-room and ducted systems take longer, depending on the pipe routes and access and the quote says how long to expect.
Who is responsible for leak checks?
The operator of the equipment, working with qualified engineers. Larger systems need regular checks: at least every 12 months from 5 tCO2e and every 6 months from 50 tCO2e. We will work out which band applies to yours.
Are you F-Gas certified?
As the law requires for refrigerant work, we are an F-Gas certified company. We’re also NICEIC approved, MCS certified for heat pumps and Checkatrade members.
What size air conditioning unit do I need?
It depends on the room, not only its floor area. Glazing, orientation, the roof and what goes on in the room all affect it, and we take them all into account on the survey.
Do you work on all makes?
Mitsubishi Electric, Daikin, Fujitsu, Panasonic, Toshiba, LG, Samsung, Mitsubishi Heavy Industries, Hitachi and others. For new systems, we recommend a brand and model to suit the job and explain why.
Air conditioning in Lewisham
Wall-mounted, multi-split, ducted and cassette systems are all part of what we install, with VRF for larger buildings. The right choice depends on the rooms, the building and how visible you want the indoor units to be and we talk you through it on the survey. Air conditioning installation in Lewisham starts with a site survey, then a fixed-price quote that names the make and model.
Space outside is often tight in Lewisham, as in much of London, which means a rear wall bracket, a flat roof or a balcony is often the best spot for the outdoor unit. We look at noise towards neighbours and windows as well as looks, and we plan the pipe route so it’s as short and tidy as the building allows.
Whatever the visit, you get a written record: commissioning details for an installation, a fault and repair note for a repair, or a record of the service. Keep it with the system’s paperwork so it’s to hand next time.
- Place
- Lewisham (SE13, SE8, SE6)
- Wider area
- Greater London
- Accreditations
- F-Gas certified, NICEIC approved
- Guide price
- One room: £1,200–£2,200 + VAT
- Quote
- A fixed price before we start
- Phone
- 07833 053749
- Last updated
- 30 October 2026
Towns and villages near Lewisham
Other services in Lewisham
Why deal with it now?
Fans and portables move warm air around rather than removing it. A properly installed split moves heat outside, keeps the noisy parts out of the room and in most cases heats too, so it works for you in winter as well. In London, hot spells can bring a rush of calls, so planning the work in Lewisham before summer avoids the wait.
Putting several jobs into one visit often makes better use of the time. Tell us about everything you’d like looked at, and you’ll get one fixed price.
Why us?
- Diagnosis first, then a fixed price
- Covering London and the South East
- F-Gas company certification
- Fixed-price quotes after a survey or photos
Read our cost guide or our accreditations.
The process
Think of the visit in three stages: look, put right and sign off. First comes a careful look at the system or the space, then we do the work, and finally everything is tested, recorded and explained. The middle part takes longest, and that takes a day or more, depending on the number of rooms, the pipe routes and the access. For a job in Lewisham, tell us about parking, permits and access to the building when you get in touch.
- You send photos, or we visit and survey the rooms and outside.
- The system is sized, positions are agreed and the price is fixed.
- Sheets go down first, then the indoor unit and the condenser are mounted.
- Pipework, cable and drain are run, the circuit is connected and the pipework is pressure tested and evacuated.
- The system is commissioned, the controls explained and the F-Gas records handed over.
Before we arrive
- Let us know if the building has a permit or sign-in process
- Tell us about parking and loading
- Keep pets and children away from the work area
How to get a quote
Every quote starts with a look at the job, either on a site survey or, for simple jobs, from your pictures and details. After that, we send a fixed price so you know the cost before we begin.
Read more
Air conditioning in Lewisham: the local picture
The Valuation Office Agency’s council tax figures put about 37% of homes in and around Lewisham before 1919, and about 69% of households live in flats, according to Census 2021 figures. Older homes often have solid walls, which take longer to core drill, so we plan pipe routes carefully and keep them as discreet as we can. For a flat, we look at balconies, flat roofs and rear walls for the outdoor unit, and the lease often needs checking first. In London, outdoor unit positions, building rules and access tend to need more planning than the install itself.
Around St Stephen's Church, a quick check of the listing and conservation maps is part of planning any install.
Lewisham is about 3 miles west of Eltham, in Greater London. Lewisham gets the same approach as every job we take on: diagnosis first, a fixed price and proper paperwork when we have finished. Across Greater London, we cover 764 places, and Lewisham is one of them.
A recent job in Lewisham
Loampit Vale, Lewisham (SE13)
- Property
- A modern co-working space on a regenerated industrial site.
- Work carried out
- Installation of four Daikin cassette units in the main working area and a wall-mounted unit in the private event space. The co-working space operates across extended hours and the installation was completed over a single weekend.
- Outcome
- The space operator reported that summer membership enquiries had increased following installation, and that the space was now competitive with co-working spaces in more central locations that charged significantly higher monthly rates.
That includes properties on Station Road, Lewisham High Street and Lewis Grove and nearby roads. Every address in SE13, SE8 and SE6 is within our area, from busy streets to back roads. Close to Lewisham, our area also takes in Ladywell (1 mile south-west), St Johns (1 mile north-west), Hither Green (1 mile south-east), Blackheath (1 mile north-east) and Lee (1 mile south-east). Larger places within reach include London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west) and Kensington (9 miles west).
Local landmarks in Lewisham
In Lewisham, that means homes and buildings near St Joseph's Academy, Ladywell Fields and The Watch House and the streets around them. Lewisham has its own railway station: Lewisham station. Well-known places in the area include Greenwich Castle (1.2 miles north) and Fan Museum (1.2 miles north). Not far away are Knight's Hill and Brookmill Road Local Nature Reserve.
System by system
Ceiling cassettes
A cassette needs a void above the ceiling for the unit, pipework and drain, and many use a built-in condensate pump to lift the water away. We check the ceiling void on the survey.
Pipework and condensate drains
Air conditioning takes moisture out of the air when it cools, and the condensate drain carries it away. Where it cannot fall naturally to a drain, a condensate pump lifts it, and we plan that on the survey.
Common problems we fix in Lewisham
Not everyone is after cooling. Direct electric heaters convert electricity into heat one for one, while an air-to-air heat pump moves heat from outside, so it gives out more heat than the electricity it uses. Most modern split systems work this way.
Common reasons people call us are:
- Not knowing which system, size or brand to choose
- A business premises that overheats in summer
- Rooms under the roof that stay hot into the night
Close to Lewisham station? A small study or box room used for work can typically be cooled with a single indoor unit.
What to look for in a quote
- Whose warranty applies, and on what terms
- Whether the quote shows VAT clearly
- Who does the electrical work, and whether they can certify it
A customer’s words
“Excellent service from start to finish. Two wall-mounted units installed in our home. Clean, tidy work: they protected all the floors and left no mess. The systems work brilliantly. Would highly recommend.”
Sarah M., East Grinstead