You will need to check load bearing partic under second storey

You have not bought the property yet, so you don’t know where the cooling breezes come from, or how the house works in a practical sense, and whether it actually needs changing of room placement. These are things that only living in a property for 6 months or more can answer. Kates idea is a good answer to opening up. But there are too many variables, load bearing walls etc, to make any comments on changing layout. Also renovation can be $1500 to $2100 per square metre. But this depends on what the walls and floors are made of, what the current maintenance level of home had been, and what specification you are aiming for. The cost could be $3000 per square metre......

If the home has all the rooms that you require, a outdoor space you require, a location you like, and in your budget, then buy the home, and live in the home and plan informed designed renovations.

For example the upstairs bathroom is approximately 7.4 square metres, so if you work on $3000 per square metre that is $22200.00. The bedrooms may need new carpet, so a minor bedroom is say 12.95 square metres. If you buy a carpet at $70 a square metre, that is $900 plus $50 worth of paint for walls. Etc etc. so calculate that per room and you will have an approximate answer. But only you know what specifications you are after, the cost of your fittings and fixtures can vary greatly.

It really doesn’t come down to how much it would cost to renovate, it comes down to how much can you afford to spend.

as others have already said there are too many unknowns to be specific about costs but renovating is often more expensive than building new as you have to first pay to remove and then pay to restore and often need custom sized new work that's much more labour intensive and expensive BUT if the house is in a perfect location at a good price and you can modify without extraordinary changes my suggestions without removing any major walls include a new kitchen and only widening the doorway between kitchen and dining and improving the ens (with or without including the extra space at the side) but the small nib wall near the original dining room door implies that there has already been part of a wall removed and why didn't they remove the rest when this small projection restricts comfortable movement ...my plan has minimal demolition and extra walls and doors to separate rooms and zone, heat, noise and family activities

BUT depending on your local climate the orientation is not ideal as the site plan suggests that the house is almost on the north boundary and this restricts sunlight and views in and out of the north facing windows (what's next door now or in the future if/when neighbours renovate?) space shown as meals is only big enough for an entry area and the old study faces south and west and could make it hot and/or cold and dark at the back of the house and restricts ideal connection to the garden.. and as usual the real estate plans are confusing and upstairs doesn't seem to match downstairs, the stairs probably infringe on the space in the retreat so i can't make realistic suggestions but there's is probably enough space to improve the bathroom and maybe steal space off the wiw for a separate toilet and maybe take better advantage of the northern aspect but all depends on accurate available space, aspect and budget and every house can be improved

Is it correct that there is no toilet in the existing ensuite bathroom downstairs?

Thank you so much for your answers.

@oklouise this is increadibly helpfull.

We are new to the reno game but my husband and I have fallen in love with the exterior style of this home (californian bungalow) and the location itself is great. just trying to get an idea of what is / isnt achievable. So your post has helped a lot. We would have about $300k to spend on renos so again, trying to figure out what is realistic. Again, thank you. so helpful.

@dreamer

Thanks for your posts.

Certainly some great things go consider.

And no, the ensuite downstairs doesnt have a toilet. Super strange right?! This is something we would look to fix with a reno.