Range from the cheapest replacing of floorboards £300 (Quality Trade Property Service based in SE7) to the dearest replacing of floorboards £500 (VLD Ltd based in SE14).
Comparing carpenter and joiners estimates for replacing and repairing floorboards gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to replace floorboards in SE13 by posting a job with HaMuch and we will send it to carpenter and joiners in SE13.

"Replacing floorboards.very squeaky through lounge floor. ? Need floor replacement. Hardwood floor"
SE12
"Replacing floorboards through lounge. Squeeky. Need hardwood floor"
SE12