Hello there..
"pre-approved" plan,
-are limited to small area & construction, there are limited as weel as that u cannot removed the exist wall..
-not specified and match with owner needed
-if u not made and renovate same & exactly, u will be fine or in worst case ur house might be demolist by local outhority.
0exactly these plan for small extension....in my experience it risky for owner..
#conclusion, used architecture plan;-)

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Added on November 5, 2010, 2:30 amhye catpowder..
all ur questioned and solution will be solve by using application, arcchitectural & c&s plan to local authority...

call me ArkiJuru 0123123951
im work as architecture @ c&s designer, 8 years experienced submission and approval to local authority, also renovate construction too..

This post has been edited by ArkiJuru: Nov 5 2010, 02:30 AM