If you’re considering an air source heat pump for your home in London, Kent or Essex, now is a great time to act. Rising energy costs, government grants and simpler planning rules have made heat pumps a practical and cost-effective choice.
This page explains typical costs, what affects pricing, how grants can help, and how to choose the right local installer.
Typical ASHP Costs in 2026
Most homes in the South East can expect a standard air source heat pump installation to cost between £7,000 and £11,000 before grants. Smaller or well-insulated homes fall at the lower end, while larger or older properties may cost more depending on the system requirements.
In London, typical installations after the £7,500 Boiler Upgrade Scheme grant often range from £3,000 to £6,000. In Kent and Essex, homeowners generally see final costs between £2,500 and £5,500. These prices usually include the heat pump unit, system design, labour, commissioning and any necessary hot water cylinder.
What Affects the Price of an ASHP Installation?
The size of your property and its heating needs are the biggest factors. Well-insulated homes often require smaller systems, keeping costs and running bills lower. The type of existing heating system, hot water demand, and any electrical upgrades can also influence the final price.
A thorough survey by an MCS certified installer will determine the right system for your home and give you a clear idea of costs.
How Grants Can Help
The Boiler Upgrade Scheme provides a £7,500 grant towards the cost of an air source heat pump. It is applied directly by your installer, making the process simple. Most owner-occupied homes replacing gas, oil or LPG heating are eligible. You can check your eligibility on the government’s website.
This grant significantly reduces upfront costs, bringing heat pumps into reach for many homeowners.
Choosing a Local Air Source Heat Pump Installer
A good installer should be MCS certified (which Harvard Renewables are) and experienced with homes in your area. They will carry out a proper heat loss survey, provide a clear system design, and handle the grant application. Local knowledge ensures the system is installed efficiently and performs as expected.
The Benefits of Switching
Air source heat pumps are highly efficient, producing three to four units of heat for every unit of electricity used. They can reduce running costs, provide predictable energy bills, and remove dependence on gas. Modern systems are quiet, reliable, and designed to integrate seamlessly with your home. Read more about the benefits of an air source heat pump.
Get Your Free Local Quote
The first step is a professional survey to confirm what your home needs and the costs involved. A no-obligation quote will show you exactly how much you could save with a heat pump and the Boiler Upgrade Scheme.
Get a free local quote today and see how an air source heat pump could work for your home.