Retrofit foundation system (spa 112-1f) for (e) mh- 433 a note to permittee once this permit is issued it will be valid for six months. Work must commence and a valid inspection performed within six months of issuance. No extension shall be granted where work has not started prior to expiration of the initial permit. Upon payment of fees, a permit extension of six months may be granted. No permit shall be extended more than two years from issuance of the initial permit to construct.