How interior building photography is enhanced by lighting
Interior architectural photography with lighting
Whilst it is very easy to turn up to photograph the interior of a building with no extra lighting, the results will be very ordinary and there will be little or no detail in the shadows. Furthermore, if you then expose for the using light coming through the window, the window detail will bleach out and produce a 'contrasty' photograph.
As with any half serious commercial photography, a tripod should be used and additional flash units postitioned within the room to light the darker areas. Architectural photography is so vastly improved with additional lighting as these two examples below will show. In the lower image, the exterior detail from outside the window has been retained on both the shots but the photograph with lighting on the right shows how much interior detail comes up.
If you don't want to go to the expense of buying a purpose built studio flash set up, reasonable results can be had with several smaller flash units concealed in darker areas.