Plumbing cost

[Josh567]

Hi, wondering if anyone can help? We're doing an extension and loft conversion, and plumber has quoted 29,000 for plumbing including new boiler, vented cylinder, piping to 2 bathrooms, 3 radiators in new upstairs, piping to kitchen, second fix plumbing and wet UFH to new extension (34m2). Does this sound reasonable for home counties areas? Asked him to remove UFH to lower cost, but he says radiators cost even more!

[JohnMo]

31 minutes ago, Josh567 said:

Does this sound reasonable

 

Get another quote?

 

[Gone West]

1 hour ago, Josh567 said:

but he says radiators cost even more

How does he justify that? I would take @JohnMo's advice.

[nod]

4 minutes ago, Gone West said:

How does he justify that? I would take @JohnMo's advice.

He doesn’t need to 

Probably busy like everyone else 

shop around 

[Josh567]

Thanks for the replies. We were quite shocked as the price is double the quantity surveyors, although I don't know how accurate that's supposed to be. Problem is he's the builder's plumber, so don't know how to go about getting other quotes in without upsetting the builder, who's great. Do people normally get other plumbing quotes if they're going with a builder?

[JohnMo]

4 hours ago, Josh567 said:

new boiler, vented cylinder

Why vented cylinder, you will get way better performance from an unvented one.

 

Also you really need to get your  plumbing in X or W plan. This will give you priority demand got water. And allow the boiler to run at one temperature for heat and another hotter one for DHW cylinder heating.

 

Also while you are getting a new hot water cylinder get one that is specified for a heat pump. This will do two things. Allow a quick reheat of cylinder and allow it to be done at a lower flow temp from the boiler promoting more efficiency. Both leading to reduced gas consumption. So a heat pump cylinder will have a 3m² coil.

 

Boiler also needs to be sized for the heat loss of the property, not based on the number of bedrooms etc. size the bedroom radiators to flow at the same as the UFH, then you are unlikely to need UFH mixer and pump.

[Josh567]

Thanks for your help, much appreciated!