How to orient a new house for daylight without overheating or losing privacy

Start with the plot rules, not the compass

A useful orientation depends on the plot shape, setbacks, access, slope, neighbouring buildings and the views you want to preserve. Before fixing the house volume, mark north on the plan and identify which façades can open up, which need privacy and where other buildings cast shade. The practical decision is to reject from the outset any layout that relies on openings incompatible with planning rules or the real surroundings.

Arrange rooms around their hours of use

Not every part of the home needs the same light. Place daytime spaces where they can receive steady daylight during the hours they are used, and reserve more difficult orientations for secondary spaces where the design allows. Bedrooms, kitchen, study and living room may need different solutions. Compare two or three simple layouts and choose the one that reduces dark circulation areas without covering every façade in glass.

Decide the shade before choosing the glazing

Spain’s Technical Building Code requires energy demand to be controlled according to the climate zone and summer and winter performance. The IDAE guide notes that external protection can limit solar radiation without giving up daylight or ventilation, and that its form should respond to orientation. Ask for eaves, fins, shutters, porches and planting to be studied together with opening sizes; a large window with no planned shade is not a complete strategy.

Protect privacy without closing the house

Privacy can be achieved by filtering views rather than giving up daylight: courtyards, high windows, side openings, screens, setbacks, low walls and planting can grade the relationship with the street and neighbouring plots. Also draw what will be visible from outside at eye level. Decide which room should open onto the garden and which needs a more controlled view before finalising the layout.

What to prepare before requesting quotations

To contact a construction company, prepare a plot plan showing north, dimensions and access; the available planning information; a topographical survey if one exists; the proposed floor area and number of storeys; and a short list of priorities for daylight, privacy and outdoor spaces. Add photographs of the views and boundaries. This will help the professional understand which part of the cost comes from the building and which from the plot’s specific conditions.

Sources consulted

• Basic Document HE Energy Saving (CTE)
• Guide to energy-efficient urban planning (IDAE)