Don't buy items you're unsure of, as this could result in an expensive mistake.

Ensure you have the correct measurements for all fittings and fixtures to save time and money on any replacements needed.

Always use a professional plumber when dealing with pipes or waterworks to prevent any damage from occurring.

Try to keep plumbing lines intact during renovations so you can reduce labor costs later down the line.

Research different materials available before making purchases; select quality over quantity if possible, as this will guarantee good results in the long run!

Make sure electrical wiring meets safety regulations; hire a professional electrician for larger jobs such as rewiring or installing sockets and switches for added peace of mind & security.