Hi puppet and buckrogers, From what I can seriously recommend is to pre-consult an experienced architect or professional engineer 1st, then shortlist a builder from these professional people's recommendation. Comments with regards from builders can sometimes be rather confusing, basically they only know how to build, the experienced 1s still need to get professional assistance at times, thus asking architects or professional engineers will definitely be more ideal, as these people are professionally trained to endorse plans for BCA, URA, SLA etc. to get approvals, they must definitely know better than most builders. PM me for builders / architects / professional engineers information and contacts, I could be able to help. Best regards, Roger