we are based in cambridgeshire, but work all over, special projects ie one offs, industrial sites, leisure centres we will work anywhere id the price is right.
we have IPAF trained operators aswell to work at high level.
regarding CIS if you are CIS4 ie payments less 18% then a lot of people will up their price by that percentage,
the other thing is you state that they are looking for build then sparkle, in reality you will be looking at build clean, reclean, and then sparkle. with the sparkel being done the morning of handover.
we would be looking for around 130- 150 for that size.
another point is that whether they are asking you to remove the radiator protection, and also if they are using weatherdeck, and therefore whether you need to cut, lift and remove weatherdeck from the property.
also what conditions the windows are in, re whether the tapes are removed prior to build clean.
regards
martin