The price might well depend on the complexity of the roof. The roof on my house is as simple as you can imagine - just two slopes - one facing forwards and one back. The roof on my sister’s house is smaller but is hipped at the corners, clips into the bedroom ceilings where it meets the walls, has lead-lined valleys at the junctions with the semi next door and with the extension and also has a complicated junction to a flat leaded section over an upstairs bay window. I’ve been up into the roofspace there a couple of times and there are hardly two pieces of wood the same, and many of them are cut at compound angles to make the joints. It’s a masterpiece of carpentry but heaven help her if it ever needs major work. Whereas every rafter in mine appears to be identical (except where they’ve been cut and trimmed at the back for Velux windows).
EDIT - It might be worth talking to your local council building inspector. When I last worked on my roof (admittedley the best part of 20 years ago now) he gave me free, impartial advice and was also prepared (strictly off the record of course) to comment on the workmanship of local roofers.
We had a quote on ours, a 4 bed Edwardian terrace with a lot of roof! It was much like yours in terms of condition and by way the cheapest was new Indian slate with new felt. Five grand including scaffoldings and disposal of old slate. If we wanted to use Cumbrian slate then nigh on double the price. To re use existing made no difference on price as extra man-hours eats that up. Also when re using, the roofers reckoned on scrapping fifty percent. They would then re use original to front elevation and new slates to the rear. These prices were last year.
I’m looking at changing tiles back to slate next year. Cumbrian prices look better than London. Haven’t got any quotes yet but I was expecting c£20k. Will be part of a bigger project so hoping to save some money that way.
I’ve been out the building game & your village for over 15 years now, So have no idea of todays prices etc. There was a really good & well respected Roofer that lived there. I’m sure he’d be happy to give you advice & or quotes.
If the Buttercross magazine is still a thing have a look for a David Sheppard & Sons, if not I could probably find a phone number for him.
He along with his sons used to do a lot of work for The Crown properties in the Vale of Belvoir & worked with a lot of reclaimed slate too. He might well be a good starting point.
Yup, that’s nearer what I would expect. I stripped and reslated our house a couple of years ago (3 bed semi) and it cost me £3K in materials, skips and scaffolding. That was using Eternit (cement fibre) slates which are far cheaper than any natural slates.