Renegotiating follow survey and EICR

MumInAFix

Hello! Complete newbie here. 

I'm buying a house following divorce, offer is accepted and sale progressing. Since I put in my offer various surveys have highlighted issues and the seller has indicated they are willing to renegotiate - I want to be fair, but I also need to do the house up (it's in a 1980s condition - think avocado bathrooms etc). I had budgeting for updating but the additional repairs are adding up! These are my reasons for price negotiation:

- offer was accepted at 335k, mortgage company values at 327k
- The survey identified wall ties and potential woodworm treatment required - estimated cost £2500
- EICR unsatisfactory more than 31 points, majority are c2 categorised. I've had 2 electricians quote and recommended full rewire at an average cost of £5000. Wiring appears to be a mix of original 1950s and some 1980s
- in addition to this there will be unexpected plaster/redecorating work due to rewire (I was just going to repaint/wallpaper myself to modernise)
- solicitor has highlighted about £500 worth of required indemnity policies due to location of conservatory to drains and no planning for utility room.

I'm happy to still proceed but what would be a fair price to ask them to come down to? My original offer was £327,500 - which would be in line with the mortgage company valuation, but they wanted more hence offer of 335k. I'm thinking maybe of going back with 329,000 and maybe settle on 330k?

Am I being unfair or would that seem about right? It's probably worth saying that the house was originally on for 350k but that was way overvalued I'd say based on other properties I looked at similar - eg 325k with garage and drive which this does not have and in better order. I like the house and I'm not trying to be a bad buyer, but this is make or break for me pulling out - which I don't want to do.

CSI_Yorkshire

You've bought a house that everyone knew from the start needed refurbishment.

You're now wanting to renegotiate the purchase price because you will need to spend money on refurbishment.

It would have been obvious (or very easy to work out) that the wiring was old, so that should already be in the original price, and there is only a "potential" need for woodworm treatment, so asking for money off because you might need to do something in future is a bit keen.

The only thing that I can see that might actually be grounds is the need for wall ties.  What's the price of that bit of work by itself?

The seller should buy the indemnity policies, not you.

No doubt others will turn up to say you should ask for £50k off, but I think it should be almost no negotiation needed.