Gas Boiler Installation Windsor

If your property is individually listed (most properties on Castle Hill, Park Street, Thames Street, Eton High Street, and surrounding streets), you will likely need listed building consent for any new flue penetration, external pipework, or alteration to the building's character. A like-for-like boiler replacement using the existing flue position may not require consent, but it is always best to check. We advise on whether consent is needed during the survey and can help prepare the application.

Yes, and in listed buildings and conservation areas, this is usually required. We route flues through existing chimney stacks, to rear elevations, or through the roof using low-profile terminals. For Georgian properties with limited rear access, a vertical flue through a chimney stack is often the most discreet solution. We survey the building thoroughly and present flue options during the quotation visit.

We mount the boiler above the 2014 flood level (at minimum 1.2m from the floor, higher if you know the water reached further), use IP65-rated waterproof electrical connections, route condensate internally, and fit non-return valves on drainage. We also install isolation valves that let you quickly disconnect the boiler before floodwater arrives. For properties that flooded badly, we can relocate the boiler to the first floor if the layout allows.

Georgian townhouses with high ceilings, solid walls, and sash windows lose heat far faster than modern homes. We typically recommend a 35kW or larger system boiler paired with an unvented hot water cylinder, rather than a combi. The system boiler provides the heating output needed for large rooms, while the unvented cylinder delivers mains-pressure hot water to multiple bathrooms. Multi-zone controls allow you to heat different floors independently.

Yes, all three are within the SL4 postcode and part of our core Windsor service area. Eton's historic properties have similar listed building considerations to central Windsor. Old Windsor and Datchet are at significant flood risk from the Thames and require flood-resilient installation methods. No additional call-out charges for any SL4 location.

Listed building installations in Windsor typically cost between £3,500 and £6,500, depending on the complexity of the flue routing, pipe concealment, and any radiator upgrades needed for the high heat demands of period properties. A straightforward combi replacement in a Dedworth semi costs £2,200-£3,200. We provide a fixed-price quote after the survey with all additional requirements clearly itemised.

Yes. For listed and period properties where modern convector radiators look out of place, we supply and fit cast-iron column radiators and steel column radiators in traditional styles. These are available in various sizes and finishes, and we size them using heat-loss calculations to ensure they provide adequate output for Windsor's larger, poorly insulated period rooms.

Yes. Dedworth's 1950s-60s housing commonly has gravity-fed systems with loft tanks and copper cylinders. We convert these to modern combi boilers, removing the old cylinder and tanks and giving you instant mains-pressure hot water. The installation typically takes 1-2 days and costs between £2,200 and £3,500 depending on the boiler brand and any additional pipework or radiator upgrades needed.