Transitions between old and new affect whether an extension feels coherent. Differences in height, material and structure should be visible early.
What the drawing needs to explain
Record window orientation, opening elements and existing shade. Add the main use periods so a specialist can assess the comfort question concretely.
Coordinate finished levels
Compare floor levels, ceilings, thresholds and the garden. Include layers still to be added, not just rough construction dimensions.
How to review the result
Request an explanation of controls and comfort-plan assumptions. Check openings and accessible components; behaviour across seasons may require follow-up.
Which trade-off matters?
More glazing does not automatically call for active cooling. Compare window size, shading and use first, then assess which technical provisions are appropriate.
Questions for your own property
- Are finished heights known?
- Who designs the junction?
- How are material differences handled?
Does plenty of daylight mean plenty of glass?
Not automatically. Position, layout and shade help determine where light reaches. Assess windows and rooflights against intended use and the desired control of solar heat.
Illustrative design situations, not evidence of completed work. Assess decisions against the actual property.