Central Heating & Gas Work in London
Soraiz Builders provides central heating and gas engineering services across London, covering boiler repairs, annual gas safety checks, boiler installation, and full central heating system upgrades. All gas work is carried out by Gas Safe registered engineers. Every enquiry gets a confirmed quote within 2 hours.
A boiler repair in London typically costs £120 to £750, a boiler service costs £70 to £150, and a Landlord Gas Safety Certificate (CP12) costs £60 to £120. Soraiz Builders carries out boiler repair, servicing, installation and full central heating work across London, with all gas work completed by Gas Safe registered engineers.
We respond within 2 hours during business hours.
What's Included
From a single boiler breakdown to a full central heating system replacement, every job is carried out by a qualified engineer and backed by Soraiz Builders' 2-hour quote promise.
Boiler repair: diagnosing and fixing breakdowns, no heat, no hot water, leaks and fault codes on combi, system and regular boilers, carried out by a Gas Safe registered engineer.
Boiler servicing and Landlord Gas Safety Certificates (CP12): annual boiler service and gas safety inspection, issuing a Landlord Gas Safety Record where required under the Gas Safety (Installation and Use) Regulations 1998.
Boiler installation and replacement: supply and installation of combi, system and regular boilers, sized to the property's radiators, bathrooms and hot water demand.
Central heating system installation and radiator upgrades: new pipework, radiators, thermostatic radiator valves and zoning for extensions, loft conversions and full system replacements.
Power flushing: clearing sludge and debris from radiators and pipework to restore heat output and protect a new or existing boiler.
Smart heating controls: supply and installation of smart thermostats and zone controls (Hive, Nest, tado° and equivalent) alongside an existing or new boiler.
| Service | Typical Urgency | Gas Safe Registered Engineer Required? |
|---|---|---|
| Boiler Repair | Emergency / same-day | Yes |
| Boiler Service & CP12 | Routine / annual | Yes |
| Boiler Installation | Planned | Yes |
| Central Heating Installation | Planned | Yes |
| Power Flushing | Routine | Yes |
| Smart Heating Controls | Routine | No |
Cost Guide
The emergency call-out / diagnostic fee is £95–£120, covering diagnosis only, not the cost of a full job, parts, or follow-on labour, so get a free quote for the actual repair price.
Detailed Cost Guide
| Item | Typical Range |
|---|---|
| Boiler Repair | £120–£750, average around £300, depending on the fault and parts required |
| Boiler Service & CP12 | £70–£150 for an annual service; £60–£120 for a standalone Landlord Gas Safety Certificate |
| Boiler Installation | £1,500–£4,500 for a straightforward combi swap, rising to £3,000–£15,000 for a full new system with installation |
| Central Heating Installation | £3,500–£6,000 for a full system installation, averaging around £4,750 |
| Power Flushing | £500–£650 including VAT |
| Smart Heating Controls | £150–£350 supply and install |
These are typical UK market ranges for reference, not fixed Soraiz Builders prices. Get a free quote for an accurate price based on your job.
Ready to Start Your Central Heating & Gas Work Project?
Get a Free Heating & Gas QuoteOur Central Heating & Gas Work Process
A straightforward process from first contact through to finished work, with clear pricing at every step.
An engineer assesses the fault or scope of work and provides a fixed quote within 2 hours of enquiry.
Work is scheduled at a time that suits you, with all gas work completed by a Gas Safe registered engineer.
The system is tested, any required certificate (such as a CP12) is issued, and the job is signed off.
Local to London
Soraiz Builders has carried out central heating and boiler work across London's older housing stock, including Victorian and Edwardian conversions in Islington and Finsbury Park where original single-pipe systems are often replaced with modern combi setups, ex-local-authority flats near Woolwich town centre with ageing communal or individual boilers, and 1930s semis around Twickenham where combi boiler retrofits are common on properties never designed for one.
What Clients Say About Soraiz Builders
“There is an old saying: empty vessels make the loudest noise. Soraiz Builders' work does the talking and it is quality. I have used a lot of contractors over the years and Hussain is by far one of the very best.”
“Soraiz Builders were a pleasure to deal with. Responsive to my messages, reasonable pricing, timely for appointments, and completed the work to a good standard. I have referred them to other property owners.”
“Very good reliable builders, excellent service. Quality and reliable competitive prices. Had a re visit after 1 month of finishing work and rectified slight issues free of charge. Will use them again and would recommend to others.”
These reviews reflect Soraiz Builders' wider portfolio of work.
Frequently Asked Questions
How much does a boiler repair cost in London?
A boiler repair in London typically costs £120 to £750, averaging around £300, depending on the fault and whether parts need replacing. Simple jobs like a valve or sensor sit at the lower end; a fan, gas valve or circuit board pushes the cost higher. An emergency call-out adds a diagnostic fee on top of the repair itself.
How often should a boiler be serviced?
A boiler should be serviced once a year. Annual servicing catches faults early, keeps the manufacturer's warranty valid, and is required annually for landlords alongside the Gas Safety Certificate (CP12). A typical annual boiler service costs £70 to £150.
Do I need a Gas Safety Certificate (CP12) as a landlord?
Yes. Landlords must arrange a gas safety check every 12 months and provide tenants with a valid Landlord Gas Safety Record (CP12) within 28 days of the inspection, under the Gas Safety (Installation and Use) Regulations 1998. A standalone CP12 typically costs £60 to £120 in London.
How long does a boiler installation take?
A straightforward combi boiler swap usually takes one day. A full central heating system installation, including new pipework and radiators, typically takes 2 to 4 days depending on the size of the property and the scope of work.
What's the difference between a combi, system and regular boiler?
A combi boiler heats water on demand with no separate tank, suiting flats and smaller homes. A system boiler uses a hot water cylinder but no cold water tank, suiting homes with higher hot water demand. A regular (conventional) boiler uses both a cylinder and a tank, common in older properties with existing pipework.
Is power flushing worth it?
Power flushing is worth it when radiators are cold at the bottom, the system is noisy, or a new boiler is being fitted onto an older heating system. It clears sludge and debris that reduce heat output and can shorten a new boiler's lifespan. A power flush typically costs £500 to £650 including VAT.
Get a Free Heating & Gas Quote
From Boiler Repair to Boiler Service & CP12, Soraiz Builders covers central heating and gas engineers London, with regular projects in Hayes, Harrow, Wembley, Ealing, Hillingdon, Brent and beyond. A written quote follows within 2 hours.