A lower total is not automatically better value. Compare the work, materials and finishing included in each proposal first.
Compare the complete intervention
Compare the complete comfort solution, including controls and maintenance. A lower glazing price says little if it creates a need for other measures or adaptations.
Align the scope
Use the same headings for preparation, demolition, structure, installations and finishes. Mark missing items and distinguish fixed prices from provisional allowances.
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.
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
- Is the finish level equivalent?
- What is excluded?
- How are changes recorded?
Illustrative design situations, not evidence of completed work. Assess decisions against the actual property.