A new boiler installation keeps your home efficient and warm. The price for the new boiler installation in London will vary significantly depending on what type of boiler you choose to purchase and what features it has. To ensure that you get the best value for your money, plan ahead!
Average Costs Overview
For a new boiler installation, expect to pay between £2,600 to £5,000. This includes the unit and labour.
Typically, combi boiler installation in London will be about £2,800 to £4,500, and are very popular because they allow you to have hot water instantly and do not require an extra tank or cylinder.
The average cost of a new combi boiler installation in the UK is £1,800 to £4,500.
However, in London the price can rise 20 – 37% because of the labour costs. This hike is due to challenges in accessing the area.
System boilers cost £3,000 to £5,000 installed, which is ideal for homes needing stored hot water.
Boiler Types and Prices
When installing a new boiler in London, the price is determined by the size and type of the boiler as well as the number of radiators in your home.
New boiler installation in London varies by this choice:
| Boiler Type | Best For | Installed Cost |
| Combi | Flats | £2,800–£4,500 |
| System | Houses | £3,000–£5,000 |
| Conventional | Tanks | £2,600–£4,500 |
What Size Boiler Do You Need?
Boiler size matters for efficiency. Most London flats need 24-30kW combi units, whereas larger homes require 35kW+.
An undersized unit will create increased load upon the heating system whereas an oversized unit will waste energy.
To determine the appropriate boiler requirement, evaluate the radiator count and hot water demand at your place.
SMD Energy will calculate exact kW needs during your survey.
Top Brands and Pricing
Reliable brands ensure value. Better efficiency means lower long-term bills.
Cost-effective units from reputable suppliers are usually a good value for money. Below are the unit (plus installation) prices for new boiler installations in London:
- Worcester Bosch – £1,800+ per unit. Longest lifespan (10 years), efficient.
- Ideal – £1,500+ per unit. Good value for money, reliable performance at home.
- Vaillant – £1,900+ per unit. Number one for performance and energy efficiency.
Factors affecting costs:
The average rate for skilled gas engineer labour throughout Greater London currently stands at £57 per hour, with many Gas Safe certified engineers being paid some of the highest hourly rates.
Additional costs relating to home size, flu upgrade or pipework range between £300-£1,500. Large homes or old systems tend to require both.
Combi boiler installation in London may need gas supply tweaks (+£500), which ensure safe, optimal flow.
Grants and Funding
In the UK, grants for boiler installation are available through the Energy Company Obligation 4 Scheme (ECO4), if on benefits or low income with EPC D-G.
There are grants of up to £7,500 for heat pumps under the Boiler Upgrade Scheme, but not for gas boilers directly. Be sure to check your eligibility for other possible avenues of assistance.
You could be among the many people who qualify, allowing you to save an average of over £1,000 on the cost of installing a new boiler in London.
By utilizing this type of grant, you can obtain the necessary funds quickly without having to spend out of pocket.
Installation Timeline
New boiler installation in London takes 1-3 days by Gas Safe pros ensuring a minimal downtime for busy households.
The fitting/installation survey is done followed by installation & testing on the same day.
So, the installation of a new combi-boiler in London often finishes in one day, which is faster for simpler setups.
Maintenance After Installation
Regular servicing keeps your warranties valid. Annual checks cost £80-£150 and they spot issues early.
You should clean filters, check pressure, and bleed radiators yourself monthly. This extends the boiler’s life.
SMD Energy offers you affordable maintenance plans for your peace of mind.
Smart Controls and Upgrades
Adding thermostatic radiator valves (TRVs) onto your existing radiators will cost you £10 to £20 per TRV.
By installing a zoned control system, you could save a further 10 to 15%.
A smart thermostat (e.g. Nest or Hive) installed will cost between £150 to £250. These thermostats can be operated via an application from any location.
SMD Energy installs smart systems alongside your new boiler.
Environmental Benefits
New A-rated boilers cut NOx emissions by 70-90% compared to older models, which helps London achieve its air quality targets.
Providing you with an environmentally friendly option and meeting the compliance with the requirements of the 2035 phase out, these efficient boilers will also reduce your carbon footprint when used in conjunction with adequate insulation.
Savings and Payback
On average, a user will save upto 10-30% of their monthly bill (estimated £200-£400 per year) with a new modern A rated boiler compared to his old less efficient boiler. Also, there is a payback period of 3-7 years, which is quicker if you add insulation or controls.
The cost of a new combi boiler and installation in the UK pays off faster with grants. You get real value over time.
Tips on buying a new boiler
- Get quotes from at least 3 separate contractors. This ensures fair pricing without cutting corners.
- Make sure each new boiler manufacturer provides a 10 year guarantee for their product. So, you feel confident that you are installing a quality product with long term benefits.
- Ask: “Can I get a grant for a new boiler in the UK?” during surveys. This may enable you to save on your new installation.
- Take advantage of off-season pricing, and avoid paying increased prices during the winter months.
Replacement Signs for your boiler
Leaks, noises, or inefficiency in signal times are warnings for you to look for. These are common in units older than 10 years.
Upgrade before full breakdown hits.
Take Action Now
Don’t wait for winter breakdowns. Book a new boiler installation in London with SMD Energy today for reliable heat all season.
Get your free survey – we’ll assess your home, check grants, and provide a fixed price quote with no surprises. Discuss the cost of the new combi boiler and installation options in the UK tailored just for you.
Enquire now to stay warm, save energy, and beat rising costs. Your comfort starts here with London’s trusted experts.
