Sale agreed on house but survey carried out problem with the main roof covering

We went sale agreed(no contract signed yet) on a 3 bedrooms house but survey carried out problem with the main roof covering.
It would cost about anything between EUR 15.000 - 25.000 to repair it correctly (called some roofing contractors to get quotes).

We would like to buy this house as it is nice and fit for our requirements except for the roof problem.
We have already got a reduction in price to go sale agreed during the current market conditions(however the roofing problem was not known by this time)

I guess the vendor won't believe the quotes I got from the contractor.
From other hand we are taking over the risk to repair the roof next summer by ourselves. So at least we are looking for some further price reduction.

What should I do? How should I approach this situation?
How much reduction in price should I request?
Or let the vendor knows about the problem and get her own quotes for the repair?

(I think this roofing problem will be recognized by any surveyor for any new buyer so the vendor is not in a winning situation to let this sale falling through and seeking for a new buyer - during current market conditions she may get lower price from a new buyer)

What I'm sure we are not going to buy without this additional repair cost accounted in the selling price.

Any advice is greatly welcomed.

Thanks in advance.

In current market conditions I'd start by requesting them to reduce the price by the full amount of the repair. Invite them to get their own quote if they don't believe yours. Perhaps you should all get a couple of quotes and take the average as being the "real" estimate of costs.

Something like this happened to me during far better market conditions and the vendor was willing to reduce by the full amount (not as major a problem as yours though).

Best of luck.

As a matter of interest,can you elaborate on what type
of problem it is that costs this amount to rectify?.

could you send them a copy of the survey and ask them to fix it before you close? Would save you a lot of hassle I'd imagine and if they don't want to do that but are desperate to sell they might come back with an even better reduction that the cost of the repair.

If they come back with a reduction not matching the quote you got you could always get the quote in writing and provide them with a copy of it just to show you are not trying it on. They could do the same if they thought they could have it done cheaper.

I wouldn't rush to buy it. Theres lots of property around with out paying more than is needed for one that need attention. If you find another on in the area that can be a bargaining chip for you.