House has many good features, I love how the bedrooms are divided from the living area, that can be very important if you have young children. I even like how the door to the laundry is screened from the dining area - little things like that are important to me. The toilet in the bathroom would annoy me, but having the second toilet in the laundry would offset that. I think I would be inclined to close off the lounge room as a TV/Media room that would free up the general living area for just living. The outdoor areas look well planned with excellent access from the house. Oklouise's idea of relocating the kitchen looks an excellent idea but plumbing could be an issue here, firstly it would be expensive just to move the plumbing and something to be generally avoided with renovations, and secondly with rooms underneath the house, it may not be possible. As the kitchen is now, opening it more to the living room could be a good idea except I can see possible safety issues with the hotplates being exposed to passing traffic - especially with young children in the house. I agree with David - you do have to think about how you are going to live in the house and the lifestyle you envisage. For this reason, if you do decide to purchase, I would strongly suggest you live in the house for a year before doing a thing. That way the things that aren't working for you will become very obvious as well as things you need or would make life easier making decision making simpler. You will also get a feel for the lighting in the house, where it can be improved and the aspect of the house - what rooms may need warming (south facing rooms) or what rooms need cooling (west facing rooms).

Sorry in My sketch I dropped off front rooms when I enlarged to sketch. In terms of size, I have family of 5. My house has 3 kids bedrooms roughly 3x3.6 including robes. Master bed is larger with two robes and room for a chair. Family bath with shower and bath and 1500 vanity, Adjacent powder room. Second bathroom is shared with laundry, laundry is 2.7 m long along one wall, as we converted laundry to study as I work from home. Works well. Kitchen dining, has room for desk off kitchen. Lounge 5x5, sunroom 3.5x4. Hall has cupboards along it for storage, prob 2.4m in length in total. This works well for us. Important to have 2 toilets accessible to whole family and 2 living spaces. I note my husband grew up in family of 5 with house half the size. The size you have seems fine overall, but it can be cheaper to extend or kbr than do lots of internal reconfigure.

The wow factor can be achieved in many ways. You have a big parcel of land at 700sqm. At the moment you have a big box as your house plan with, in my opinion, too many rooms for only 3 occupants. You obviously have a decent budget, so look at a plan that has multifunctional rooms, that will offer the same use but not vacant rooms not being used. You have 5 bedrooms and 3 bathrooms and 4 living areas, for 3 people. Do you have a view, will you ever actually sit at the balcony or just have to sweep it when dust accumulates. Build smart not necessarily big. Are you needing a house with all these rooms, or are you trying to impress friends and family. We all want to impress our friends and family, but a nice looking home with a wonderful FEEL and the WOW factor doesn’t have to be lots of rooms that may not get used.

having changed hands three times in five years suggests that there are more problems with the house/location than the floorplan and a block subdivided from a larger block is likely to be surrounded by close neighbours that would restrict passive solar design option so my suggestions include two bathrooms, open plan kitchen and living room with separate family room and, subject to front setbacks and local regulations, an entry porch, carport and landscaping to screen western sun and suitable skylight locations, insulation and reverse cycle AC could help brighten and temp control (and based on available dimensions of the other rooms the original dining room should be about 5m not 4m long)