New boiler installation London
Tell us about your property and heating needs. We will confirm whether a suitable assessment can be arranged.
What we do
Tell us about the job so we can check the scope and the next step.
- Describe your current system and heating needs
- Send photos if available
- We will confirm the next step after reviewing the scope
New boiler in London
We arrange Vaillant and Worcester Bosch boiler installations through registered subcontractors. They carry out and sign off the gas work under their own registration. Send us your property and current-system details so we can confirm scope and a quote before agreeing a visit.
Start with the property and existing system
Replacing a boiler is not just a choice of brand. The present boiler type, hot-water arrangement, number of bathrooms and available space affect what can be proposed. Tell us whether you have a hot-water cylinder or storage tank, how the current system performs at busy times, and whether you want to keep the boiler in the same position. SJW can then assess whether a suitable registered subcontractor can survey and undertake the gas work.
Photographs of the boiler, nearby pipework, controls and proposed location help with the first conversation, but cannot establish the full installation scope. We arrange Vaillant and Worcester Bosch installations through registered subcontractors. The subcontractor carrying out gas work checks the property and signs that work off under their own registration and company name.
Choosing an installation scope
A like-for-like replacement may be less involved than changing boiler type or moving it, but the existing flue route, condensate drainage, electrical supply and heating pipework still need assessment. Tell us about any known pressure problems, cold radiators or previous system leaks. A registered subcontractor assesses the gas installation requirements; other plumbing or electrical alterations should be identified in the proposed scope rather than assumed to be included.
The quote should distinguish the appliance and controls from any necessary pipework changes, system cleaning or alterations to the surrounding space. If you already have a preferred model, share its details as a starting point, not a guarantee it will suit the property. We can discuss options once the registered subcontractor has assessed the gas work and practical constraints, without promising a particular manufacturer specification in advance.
Planning the work and handover
Before work is agreed, check where the boiler will go, what access is needed and which parts of the heating and hot-water system may be unavailable during the installation. A change of location or unexpected condition can affect the sequence and require a revised quote. SJW arranges the job; a registered subcontractor carries out and signs off the gas work under their own registration and company name.
Ask at quotation stage which commissioning, operating information and installation paperwork will be provided for the agreed work, and by whom. Do not assume a particular completion date, certificate or warranty registration from this page. The installing subcontractor is responsible for gas-work records in their own company name; retain the agreed scope and the documents actually supplied at handover for future servicing.
Price, exclusions and later care
There is no fixed boiler-installation price or direct booking on this page. The quote depends on the selected appliance and controls, the condition of the existing system, access and any required alterations. Give us the postcode, property type, current boiler details and photographs so we can confirm the appropriate assessment and a written scope before committing to the work.
A new boiler may sit alongside older radiators, valves and pipework, so agree in advance whether remedial heating-system work is included or separately quoted. After installation, keep the manufacturer's instructions and the registered subcontractor's gas-work documentation together. Ask what future servicing schedule applies to the selected model and warranty terms rather than assuming that a service or cover plan is included in the installation quote.
How we assess your enquiry
- Send the details. Describe the issue and include photos where useful.
- We check the scope. We confirm whether a suitable specialist can assess the work.
- Agree the next step. If we can take on the work, we confirm the scope and quote before booking.
No price or visit is confirmed on this page. Please send the details for assessment.
Frequently asked questions
Can I ask about a replacement boiler?
Yes. Send your property and current-system details. We will confirm whether an assessment can be arranged.
Can I keep my boiler in its current position?
Possibly. The registered subcontractor must assess the location, flue and connections before the gas-work scope is confirmed. Send photographs of the current position so we can start the enquiry.
Can I change from a cylinder system to a combi boiler?
We can review that option, but hot-water demand, pipework and the existing system need assessment first. It is a different scope from a simple replacement, with gas work carried out and signed off by a registered subcontractor in their own company name.
Which boiler brands can I ask about?
You can ask about Vaillant and Worcester Bosch boilers. Tell us your current system and preferred model so we can assess the property and quote a suitable installation. A registered subcontractor carries out and signs off the gas work under their own registration and company name.
Will you remove the old boiler and alter my controls?
Those items must be specified in the agreed installation quote. Send us details of the current boiler and controls; we will assess the work and identify what is included or separately priced.
What documentation will I get after installation?
Ask us to set out the expected handover documents when the job is scoped. The registered subcontractor carrying out gas work signs it off under their own registration and company name; this page cannot guarantee a particular certificate or issue date.
Areas we cover
Tell us what needs attention
Send the job details. We will confirm the scope and suitable specialist availability before any booking.