(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170


Pages: 1008-1012
Amos Chom Haruna, Aminu Mohammed and Gumgaro Simon-Peter Buba

keywords: Bill of quantities, building projects, construction industry, project preliminaries


The paper appraised contractors’ perception of pricing preliminaries of housing projects in Kaduna, Nigeria and achieved the following objectives: identified and evaluated common preliminary items in bill of quantities priced by building contractors; identified and evaluated the level of significance of factors that contractors consider in pricing project preliminaries; assessed the methods contractors adopt in pricing project preliminaries; and estimated the cost ratio of preliminaries to final contract sum of projects carried out by contractors. Data were obtained through exploratory survey of 50 firms involved in mass housing projects and mean rating (MR) was used to evaluate factors that influenced pricing of preliminaries by contractors. Results obtained shows that water, lighting and power with significant mean rating of 4.72 is the commonly most priced item of preliminaries. Nature of construction site is ranked topmost factor which influence pricing of preliminaries by contractors with 4.68 MR. Responses on the perception of contractors regarding methods of pricing project’s preliminaries revealed that 48% of the contractors used percentage ratio. 30 and 22% of the contractors employed fixed charge (lump sum) and estimation methods, respectively. 10% of the contractors allowed more than 10% of the contract sum as amount of preliminary cost of a project. It is recommended that contractors should view project preliminaries pricing as a risk in contract sum estimation and approach it on the basis of their experiences in the field as well as on well thoughtout discretion to avoid losses.


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