Hi Zunilka Whitnall - The Victorian terrace house is certainly worth investing and renovating and you seem to be in possession of quite a gem of a property, single fronted three bedrooms are certainly in the minority, generally two bedrooms is more common. I have designed renovations to a number of single fronted Victorian terrace houses and I'm fully aware that every millimeter counts, as you generally do not have much space. Although your design is a good attempt at resolving the space allocation you might like consider other possibilities.

These are are some of the areas I would look at;

1. Although there are limited possibilities for light penetration I would place the north point on the drawing, this might change some of possibility of accessing north light even if it might be via the splitting of the roof to gain north light in winter.

2. I notice that you have a 1500 setback on one of the sides, I would assume that this is required for access, but unless you have extraordinary circumstances this could be cut back to 1000, which is relatively good for nearly all type of access even if you cut it back to 1200 you will gain 300 mm for the space in your lounge, and living areas, and if you go back as far as the bathroom it would mean 10 M x 0.5 = 5 m2 this is a considerable space in a tight renovation as you are proposing. There may be other issues why this is not possible (planning and Building issues) but long term it could mean a considerable gain in comfort and eventual return.

3. The proposed bathroom could really gain from a little tighter planning, the bath itself really does take up some valuable space by its current position, and far to much space is allotted to travel to get to the toilet. Furthermore if you accidentally have the bathroom door open the first view you you get is of the toilet, this is a privacy issue, especially for guest. The vanity is far to small and baldly positioned for it function, some redesigning might of the bathroom might be very beneficial.

4. In the kitchen the first thing that strikes me is the position of the stove top (Hot plate) it seem to have very little space on either side for functionality and it suffers from the problem of having the sink to across a walking area away from the hot plate. This is can be a problem in an emergency when you have to move a hot item (or an item on fire) to the sink. It is always best to have a sink separated about one working station (about 800 mm) from the hot plate. This allows you to move a hot item in an emergency quickly to the sink and not have to cross a pathway where one of your children might be standing at the wrong time.

It might be worth while looking at a kitchen design lengthwise along the boundary wall and thus possibly gaining some space, especially if you can make the lounge 500 wider by reducing your side walkway. You may like to look at this renovation that I did some time ago for some tight planning in the kitchen;

http://www.newhomedesign.com.au/index.php/residential/kambrook27and this example for a liner kitchen with a central bench which is part of the entertaining area

http://www.newhomedesign.com.au/index.php/residential/gem   

Another area where you might like to review is the method by which you treat the back to front slope. If I read the drawings correctly you appear to have about 5 steps rise from back to front, so your back yard or "alfresco" area is slightly less that a 1000 mm above from your front door. In your design you change the floor level of the house to resolve this issue.

If you could manage to dig out the extra earth and make your house on one level you would have a good number of advantages. (depending on existing founding depth of existing footings on the party wall) Terracing the back excavated area with a couple of 500 mm stepped seats would provide seating area for your guests and/or raised bed for planting.

You would have to consider your surface drainage which might become an issue.

As Victorian houses are generally tight in planning, some 3D views would greatly assist in understanding of the space, it would be good to have this kind of service included, to get a feeling for the space. Most Architectural design packages produce 3D views with very little extra effort. I certainly produce a number of 3D views as part of my service for all my clients.

Also, I notice that the internal walls are represented at the same thickness as the external walls, although this is possible it is not usual. It might be worth to check the thickness of internal walls and have them represented correctly. (generally internal walls are 110 mm (41/2" in imperial units) and external 230 mm or (9" in imperial units).

Renovations are never simple especially small Victorian ones but they can be very rewarding and you seem to be putting in a good effort in your research and planing, I'm sure that I only have scratched the surface in terms of possibilities, however I hope to have been of seem help, I would be happy to consult further on this project.Regards - Michael Manias - mm407p@gmail.com