pragmatistm:
@jarus, 680k is not reasonable for only the woodwork. If that involves the roof cover (aluminum or nigerite) then the cost can be reasonable. But the OP said only the woodwork. 680k is too high. But I can see there were items not needed in the list and there are wrong calculations also.
5 inch nail is not needed. What is needed is 4inch and 3 inch nail. 4inch of two bags and 3inch of one bag. You won't need up to 22 fascia board. Maximum of 20 is OK. Two bundles of oja agba is OK too. The capenters labour of 160k is too high. Maximum of 100k or much less.
As a matter of fact, most of the quotation above is in excess. You don't need as much wood as listed there.
I'm well experienced in this (son of a carpenter, semi- capenter myself) and I recently finished my roofing of 3 bedroom apartment too. I spent around N300k for my woodwork.
@op you can email me for further advice [formailsalone (a) gmail dot com] or send your WhatsApp contact.

@ pragmatism, can you give a quote based on the roof drawing?

Interesting! I just couldn't help but wonder how people who say they are professionals use abusive phrases in the name of defending their profession. The Op stated somewhere in his post, 'no offence meant'. And yet some people went to town abusing him rather than engage him in a constructive discussion. I am not an engineer or builder or whatever, just stumbled on this thread whilst in search of information. I believe his thread also benefits the non building professionals like us, so we have an idea what to out for as well if we engage the "professional".

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