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31m2 x £1500 p/m2 = £46,500
Architect £5.8k
(depends on the architect - this is 12.5% of construction - not unreasonable for a full service and amount of work involved on an existing building IMO)
10% Contingency £4.65k
SE 1.5k
Party wall 1.5
B regs 1 k
£61,950 + VAT £12,190
=£ 74,140£1500 is a fairly modest £/m2 rate i think but i'm no QS.
Here's another calculator:
https://architectureforlondon.com/news/loft-conversion-costs-london/
Yeah that's what I am thinking too.
I imagine most fancy ones are 80K+ (Dedraft, EC) but IMO with lofts you can save money by reducing the ask of an architect.
Like this: https://dedraft.co.uk/projects/rb-residence/
Paging user @Sheppz