I've just had my 2 lot subdivision approved in Brissie and I need to get the stormwater works done. I'm trying to do a feaso on selling with the DA vs doing the titling myself and the biggest unknown is the excavation/drainage works for the stormwater. Do plumbing companies generally charge a per mtr rate on this type of work, or do the figures vary greatly depending on the company and the site? The trades won't give me any indication on costs until I provide them with a detailed survey but it would be great to work out a rough figure for now. If the profit will be comparable pre-titling then I'd rather flick it off now than to do all of the works and tie up my funds for a bit longer.