Modelled ground shadow at the selected time

Building Shadow Simulator

See when a balcony is in sun or shade, the variable that decides if plug-in solar is worth it.

See it in action: search a postcode, drop your balcony, read its sun hours.
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Azimuth
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Elevation
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Solar noon
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Sunrise
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Sunset
UK
GMT / BST

Your balcony

m
Drop a marker on your balcony to begin

A model, not a survey. Buildings and heights come from OpenStreetMap and may be missing, dated, or estimated where height data is absent. Where our LiDAR coverage reaches your spot (currently parts of Exeter and north-west London), terrain and tree shading are folded into the sun figures; elsewhere trees are not modelled. Treat the result as a guide, then check the spot yourself. Curious how it works? See how we model accuracy. Prefer sharper buildings? Try the detailed 3D beta. For the full saving in pounds, use the postcode calculator.