Calculating Costs of a Construction Can Be Difficult

Cost estimating time-consuming. dangerous tt wrong estimates require time-consuming expensive redesign. beginning project, responsibility cost control (if any) established.

If architect responsible doing estimates, architect sd consider following points:

Apples Apples: discussing costs budgets clients builders, parties se ty comparing “apples apples” (i.e., included excluded).

Examples misunderstandings:

(1) Cost land (is usually excluded).

(2) Financing costs (are usually excluded).

(3) Architectural/Engineering (A/E) fees (are usually excluded).

(4) City government fees (are usually excluded).

(5) site included excluded a  value square footage estimate?

(6) Furniture, Fixture, Equipment costs included excluded (usually excluded)?

Variables: value square footage figures various building types  average simple buildings. modified following variables:

(1) Location. Modify costs actual location.

(2) Historical Index. cost data old, modify current future time often-published modifiers.

(3) Building Size. value square footage costs modified size project.  Median sizes modified roughly follows:

As size goes down, cost goes ratio 1 2.

As size goes up, cost goes dn ratio 3 1.

(4) Shape Perimeter. Increases perimeter complicated shapes wl cause costs up. We single elements articulated (e.g., rounded corners types coursing materials masonry wall), add 30% costs involved.

(5) Height. stories goes cost goes structure, protection, life safety issues, etc. additional story add 1% 5%.

(6) Quality Materials, Construction, Design.

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