A lower total is not automatically better value. Compare the work, materials and finishing included in each proposal first.
Compare the complete intervention
Compare glazing, storage and finishes as a connected package. A larger opening can require additional bespoke work when standard cupboards no longer fit their original position.
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
Draw fixed furniture, sightlines and opening windows together. Allow room for screening so it does not later obstruct cupboards, heaters or passages.
Which trade-off matters?
A larger glazed area can visually open the room but remove useful wall space. Compare window divisions and bespoke storage together, including curtains or other screening.
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.