The building inspector shall deny final approval and acceptance and shall refuse to allow final public utility connections to any such building or dwelling unless curbs, gutters and sidewalks, where required by this chapter, exist, are constructed, or unless money or a bond to guarantee their construction is deposited with the city in a sum equal to the estimated cost of the construction of the improvements as determined by the building inspector, and providing for such construction within ninety days. (Ord. 109 § 4, 1967)