This is all about how to look at floor plans for a house and relate them to the outdoor environment and surroundings.
We take a look at...
Think about the site and its features (sloping ground, trees, water, wind direction and other features on the site) and surroundings (views, surrounding buildings, neighboring noise sources such as roads). If you’re building a new home this will help you think about where to locate your home on the land.
Make sure the floor plans for a house are placed to take full advantage of the sun (in a temperate climate) or placed to be protected from the sun (in a very hot climate). The home will gain a lot of passive heat if it has windows on the ‘sunny’ side. Decide if your main living rooms and outdoor living space should be in the sun or in the shade and see how the floor plan measures up with this.
Work out what roughly what shadows will be cast by surrounding buildings and trees.
Remember the sun rises in the east and sets in the west. If you’re located away from the equator the path of the sun changes throughout the year with the sun high in summer and low in winter. The difference of this variation gets bigger as you travel from the equator to the poles. If you’re in the northern hemisphere the sun is in the south, the opposite if you’re in the southern hemisphere.
In the northern hemisphere northern light gives a diffused flat light that doesn’t change much if it’s a sunny or a cloudy day. Southern light is brighter and windows on the south side will receive direct sunlight if it’s sunny. Turn that on its head for the southern hemisphere.
Here are a few house plan shapes which capture light on two sides of the main rooms.
In a square house plan, the corner rooms will get light from two sides.
If the house plan is one room deep, light can come in from the opposite sides of most rooms.
Staggering the edge of the house plan creates more exterior wall and hence more opportunities for windows.
A house plan with wings or what might be called an H design is a combination of the square house plan and the long house plan and allows. This creates lots of exterior wall space for windows.
If your site, building codes or climate doesn't allow windows to the exterior, or if the climate is such that your home needs to be protected from the sun the answer is to build and inward facing house with an atrium and perhaps skylights.
Wind – let’s think more in terms of gentle breeze. If the climate is hot, a gentle breeze can be a real bonus to say the least. On the flip side - if there’s a strong, persistent wind then the house should be orientated to provide shelter from the wind. It’s just another thing to bear in mind when thinking about how the house is orientated on the land.
Sometimes you can figure out the prevailing wind direction just by looking at the surrounding trees.
It’s also worth checking the wind rose for your nearest location. A wind rose plot shows the direction, frequency and speed of winds from any particular direction. In the wind rose plot below the wind comes mainly from the south. Look at the wind rose for each month for your location to get a picture of the winds during the year.
Here's some more pages on floor plan analysis.
The floor plan symbols page may also be helpful.