
For most UK homes, gas boilers are cheaper to run. In 2025-2026, electricity costs more per kWh than gas under the Ofgem price cap, but is more efficient.

It’s mid-July. The windows are open, fans are whirring… but the heat just lingers. The thing is, hotter summers are becoming the norm. To such an extent that many homeowners and businesses in Dorset and Hampshire are now turning to air conditioning for lasting relief.
But how much does it cost to install air conditioning, and what should you budget for locally?
Based on 2025 Checkatrade data, many homeowners can expect total costs between £1,800 and £3,600 for typical installs. Your final quote will depend on your system type, room layout, and any required electrical work.
In this guide, we break down typical UK and regional costs, explaining the key factors that affect the price. We’ll also share tips on how to get the best value, especially when working with a local, trusted installer like Greenstar.
First things first: Split systems are ideal for single rooms. Multi-splits cool several spaces independently. Ducted systems deliver seamless, whole-property comfort but are more complex to install.
Here’s what you can expect to pay based on the system type:
Modern units now utilise R32 refrigerant, resulting in quieter and more energy-efficient operation. Many meet Energy Saving Trust recommendations, reducing their carbon impact and running costs in the long term.
For more information, check out our blog on What Is Air Conditioning? How It Works in UK Homes & Offices.
Across the South, prices typically align with national averages. However, local factors like property type, access, and system design will influence your quote.
At Greenstar, we install air conditioning systems in Bournemouth, Poole, Southampton, Salisbury, and surrounding areas. Most of our customers pay between £1,500 and £4,000, depending on system type and number of rooms.
Our engineers hold F-Gas certification and are registered with Gas Safe. It should go without saying, but we also comply with UK building regulations for refrigerants and electrical safety. We provide fixed-price quotes after a free site survey, so you’ll know exactly what’s included, with no hidden extras.
Every property is different, and a few key factors will shape your final quote, for example, the system type:
High ceilings, multiple floors, or restricted access (e.g. flats with no outdoor wall) can increase installation time and complexity. Detached homes or commercial buildings with easy exterior access are quicker to fit.
If your existing electrics need updating or a dedicated circuit for the outdoor unit, this will add to the cost. We’ll identify any additional work required during your survey and collaborate with qualified electricians as needed. Electrical work may add £400–£700, depending on site conditions.
By law, systems using refrigerant gas must be installed by F-Gas-certified professionals. Our installers are fully insured, certified, and highly experienced. We go above and beyond to ensure safety, compliance, and long-term efficiency from the very first day on the job.
Here’s a quick reference to help you plan:
Not sure what’s best? We’ll recommend the proper setup based on your space, usage, and energy goals.
Air conditioning is an investment, but there are smart ways to keep it affordable:
The correct setup now means fewer repairs later, lower energy use, and a more comfortable living or working space year-round.
Wondering what your system will really cost? A free site survey is the best way to get accurate, transparent pricing without pressure.
Here’s how it works:
Knowing the cost of air conditioning installation in Dorset and Hampshire helps you plan better and avoid surprises. If you’re cooling a bedroom, refreshing your home office, or creating a better space for staff and customers, the right system is essential.
At Greenstar, we believe in expert advice, fair pricing, and local service you can trust. Our F-Gas and Gas Safe-certified engineers take the time to get to know your space. They suggest the most efficient setup and install it with care. You won’t find any hidden extras or hard selling. We’re proud to support homes and businesses across the South, from Bournemouth and Poole to Southampton and Salisbury. Wherever you are, we’re here when you’re ready.
Call 01202 355 344 or book your free site survey, and let’s get your home or business feeling cooler faster.

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