A clear budget starts with clear scope.
The cost follows from the existing building and the agreed work.

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.
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.
What belongs in the budget?
- Survey, investigations and design preparation.
- Demolition, foundations, structure and new building elements.
- Electrical, water, heating and ventilation work.
- Windows, floors, walls, kitchens and bathrooms.
- Access, protection, scaffolding and waste removal.
- Clearly identified provisional sums and change arrangements.
A starting price needs a defined scope.
Ask for work, materials, VAT, assumptions and provisional sums to be clearly described. Undecided items should remain visible so an early estimate is not mistaken for a fully developed final budget.
Compare the content
Consider preparation, protection, timing and reinstatement alongside the total price.
Read the quote comparison guide