Boiler installs for a flat or apartment
1960s low-rise, 2000s conversions and modern developments across the urban areas of CM/EN. We do a steady stream of boiler installations across flat or apartments in West Essex and East Herts. Flat installs mean freeholder paperwork, flue routing constraints and often a combi-to-system decision — we handle all three in one survey.
You're not getting a call centre — you're getting Grant.
The same engineer quotes the job, does the work, and answers the phone afterwards if anything's not right.
Gas Safe Registered
Every gas job legally signed off
18+ years on the tools
Grant has been fixing boilers in Harlow since before smart thermostats existed.
Real human on the phone
Most calls answered the same day, often within the hour.
Locally based in your area
Not a national chain — your local engineer, your local prices.
Flat or apartment-specific issues we see
- Shared/communal flues on 60s low-rise limit boiler choice
- Freeholder/managing agent permission needed for external flue changes
- Older flats often have gas pipe undersized for modern combis
- Kitchen wall thickness often too thin for standard flue depth
Our approach for flat or apartments
For flats we always check flue routing options at survey — sometimes the only viable install requires switching from combi to system boiler, or vice-versa. We handle the freeholder paperwork for you.
How a flat installation runs
- Freeholder pack prepared before any tools come out
- Flue route assessed — external, roof or communal chase
- Gas supply pipe sized against the modern combi (often needs upgrading from 15mm)
- Install done in a single working day where flue routing allows
Freeholder timeline
Add 1-2 weeks to allow freeholder sign-off on any external flue change. Straight replacements with same flue location: no wait, same-day install.
Request a property type · flat or apartment quote in your area
Real engineer reply — usually within the hour during working times. Fixed written quote, no commission-driven sales, 12-month workmanship guarantee.
- Gas Safe registered
- Same-day cover where possible
- Fixed written quotes
- Manufacturer warranties up to 12 yrs
Frequently asked questions
Do we need the freeholder's permission?▾
For any external flue change, yes — most freeholders approve within 2 weeks. We provide the technical spec they need to sign off.
Can we use a room-sealed appliance?▾
Always — we don't install open-flue boilers in flats, they're a CO risk in confined spaces.
Do you need to notify the freeholder?▾
For any external flue change, yes. Straight boiler swap with same flue location, no.
Communal flue — can I still change my boiler?▾
Only to a compatible SE-duct or U-duct model. We survey and confirm before quoting.
Related pages you might want
Get a fixed quote for your flat or apartment
Freeholder pack included, no surprise upsells, real install date.