Rendering or photomontage: which does a building permit need?
A photomontage inserts the modelled building into a real photograph of the site; a full rendering models the surroundings too. For building permits and neighbour consultation, the photomontage is usually the right choice because the surroundings are provably real; for sales marketing, the full rendering is, because light, season and people can be chosen.
For the permit
Authorities and neighbours want to see the new volume where it will stand, at its true height, with the trees that exist. A photomontage into a photo taken from a public viewpoint answers that with no room for argument: we match lens, perspective and sun to the photograph and insert the building. Many Swiss municipalities ask for exactly this; German and Austrian authorities accept it for council presentations.
For the sale
A sales image is allowed to choose: the evening light, the summer foliage, the family on the balcony. That needs a modelled scene. The full rendering also gives every further view — the courtyard, the entrance, the aerial — from the same model, which a photomontage cannot. Buyers compare the finished building with the images, so the architecture and materials stay exact; only the atmosphere is chosen.
Cost and what to order
A photomontage is typically cheaper than a full exterior view because the surroundings are photographed, not modelled; it needs a good site photo, ideally taken for the purpose. A project that needs both — permit now, sales later — orders the model once: the photomontage for the submission and the full views from the same model when marketing starts.
Related questions
Who takes the site photo for a photomontage?
You can, from the viewpoint the authority asks for, with the camera position and focal length noted; or we organise a photographer or a drone through a local partner.
Is a photomontage accepted as evidence in objections?
It is the standard format for exactly that, when the camera data is documented and the building is placed from surveyed coordinates. We deliver both with the image.
Can a photomontage be used for marketing too?
For a single-family house or a small building, often yes — a good site photo in good light is a convincing sales image. For a development, the full rendering pays off through the further views it enables.