I know, I know, but seriously I prefer the 'before' at least it has some personality. 'After' booooring, sterile.

do you know exactly what you plan to do and have scaled a plan of the space including a wish list of new work? do you know the specific costs that were included in the builders' quote that you could use as a check list for what you need to do and where you could economise? would the builder let you use his tradespeople if you do the diy? it's often better to use trades that are used to working together or can recommend someone they know.... assuming you have no asbestos to be removed i suggest you start with an inspection by a plumber, electrician, waterproofer and tiler to confirm precise location of new work, identify any potential problems and discuss lead times for disconnections and expected reconnections of power and water and ask for quotes NB..do not demolish anything until you have confirmed everything that needs to be done, who will do it and when and all supplies are on site ready to start (in the correct sizes, models and quantities in original packages with precise installation instructions)...you need to plan the work to minimise time without a functioning laundry and minimise time that trades will need to charge for their time, can you economise by recycling any old taps, tubs, floor wastes, old skirting boards and architraves and what about flat pac cabinets instead of custom made? research and source all new appliances, tub, taps, tiles, cabinetry, window coverings and light fittings before you demolish the old laundry...the question about tiles and skirting boards depends on what you want but a standard tiled floor could have a tiled skirting board all round or the tiler can help confirm the most suitable arrangement for your job ...it's not the cost of the few metres of tiles that's the problem it's the extra cost for the waterproofing and tilers time that adds up and it's usually best to paint after the tiling is finished, then add the cabinetry, install tubs and taps and the washer comes last but demolishing never happens first...best of luck , it becomes easier with practice!

You won't knock out walls for that budget. That is kitchen refit only. Don't brick up the sliding door, it will make the space impossibly dark and depressing. Better to just lock it and pretend it's a window. The real problem in that kitchen is that corner wall that eats into the available bench space. Is that hiding a water heater or something as it doesn't appear to make sense from the photo's you have. If Ii'm reading that correctly you could possibly move that wall outwards to free up extra bench space in that corner and enable a corner top cabinet. Toaster, kettle will fit there nicely. If that's within your budget I'd do it because it will fix most of the problems with your kitchen. When you have a small kitchen like this an easy way to increase bench space without structual changes is a nice kitchen trolley that increases bench space when you need it and can be parked over near the dining area when you don't. I'd replace the current stove with one that has an induction or ceramic cooktop. Because it's flush you can use the stove top as extra bench space when you're not cooking. Makes the space more flexible. Preferably put in a cooktop on the bench and separate built in oven rather than a freestanding unit. The integration will make your kitchen appear more spacious. With the small space you really do need top cabinets but solid doors are a bit claustrophobic so I'd go with a glass fronted upper cabinets so it doesn't swallow your space but still gives you storage. Also install under cabinet lighting this will help out with visibility when cooking at night. And if possible recess the kickboards to reduce their visibility or change them to brushed aluminium this will make the footprint appear more spacious.

The grey walls don’t look fabulous especially with the windows. I wouldn’t be decorating around them. The walls won’t take a lot to be repainted as they are in great condition. You’d be wasting your money trying to match your flooring to them. Flooring is not cheap and impacts your whole decorating scheme for a lot of years.