when do i need Quantity surveyor and/or construction plan?

[itayshap]

Hello all,

I'm planning to fully renovate a house, turning it to a 4 bedroom HMO
The renovation will include fully refurbishment of the house internally and externally, upgrading the kitchen and WC's, wiring, heating system etc.
The building costs will be around 30-35K.
Currently my builder based his costs using the detailed plans used for building reg control, but i'm worry that calculating building cost only by visiting the site and using the detailed architect plans won't be accurate.
Should i need a construction plan from the architect for this scale of work?
Should i need a Quantity surveyor or it is too simple project for that?
Should i use JCT contract with dated work millstones with Liquidated Damages clause or it's a bit overstretch ?

Is the project's size o determine if i need Quantity surveyor and construction plan? are there any other considerations?

Thank you,

 

[realdeals]

First of all you seem to be doing a lot of refurb for a fairly small amount of money - is that a fair reflection of the cost?

From the list there do not appear to be any major structural changes. If in doubt ask your builder for a breakdown of their cost calculations. Then if you are unsure, ask your architect for their opinion on the costs.