It's on the previous page. Slap an extension (orangery-style) on the end that doesn't touch the boundary and doesn't disturb any load-bearing walls, enlarging footprint of existing timber conservatory that needs replacing anyway.
Don't have it costed but I suspect less than 50% of the full job, not least because we wouldn't need to rent somewhere else for 6 months (I have zero desire to live on a building site).
It's on the previous page. Slap an extension (orangery-style) on the end that doesn't touch the boundary and doesn't disturb any load-bearing walls, enlarging footprint of existing timber conservatory that needs replacing anyway.