Photograph the starting point, too.
Why the finished photograph is only part of the picture.
Show what changed.
If the only photograph is taken after the renovation, you lose part of the explanation. The starting point shows the constraints and makes the change visible. A finished room becomes more informative when people can see what had to be resolved.
Document with the comparison in mind.
Choose viewpoints before work begins and return to them after completion. Keep useful details in the frame. Where possible, use comparable camera heights and perspectives so the viewer can understand the change without having to decode it.
Record the decisions.
Photograph the material choices, key stages and details that show how the work was done. Then edit the selection around what explains the project. More images don't automatically make the story clearer.
Make the story useful.
Use short captions to explain the challenge, the choices and the outcome. Then give someone interested in similar work a clear way to get in touch.