How much would it cost to renovate a terraced house that would need a lot of work if I'm using professionals?

Does it need a new roof, plastering all over, new kitchen, new bathroom, damp course, full re-wire, garden/yard sorting, rendering, ceilings, double glazing, internal doors, painting inside/outside, new guttering, new boiler and radiators(how many and what size?)?. That will do for a list for now, cheers.

Sorry forgot to add, are you gettng this work done or are you looking for a quote?

using ZipperClubs list £15 to £20K
new roof slates/tiles felt and battens £3000
new loft insulation £150
plastering repairs say £1500
new kitchen, £2000
new bathroom,£2000
damp course, £500
full re-wire, £2500
garden/yard sorting, £350
ceilings, say £1000
double glazing,£1800
internal doors, £500
painting inside/outside,£800
new guttering fascias, £500
new boiler and radiators £2500
repointing ?
dry/wet rot ?
woodworm treatment ?
damaged floorboards ?
new floor coverings ?

£800 to paint/decorate a whole house interior and exterior.

That's very cheap unless you are just talking labour.

Double glazing would probably cost more - £3k+ also if you need new exterior doors included - possibly around £5-6K for a 3-bed terrace. Depends on the plastering - could be small jobs and included in with the decorating costs, if you negotiate with the decorator. Check for grants for boilers and radiators, insulation from energy trusts or council as these can be free or at a very low cost.