Why a building costs what it costs in Conakry or Freetown: import share, logistics, seasonality, labour structure, energy and the contingency lines that separate a realistic budget from an optimistic one.
Anyone planning a building in Guinea, Sierra Leone or a neighbouring market eventually asks for a cost per square metre. It is the wrong first question. The same building, to the same drawings, can differ substantially in cost between two sites a few kilometres apart, and the reasons are structural rather than negotiable. Understanding those reasons is what allows a budget to survive contact with the project.
This guide sets out the cost drivers rather than the figures. Prices move with steel and cement markets, freight rates and exchange rates; the structure of the cost does not.
Every project has a split between what is bought locally and what arrives by sea. Sand, aggregate, blockwork, common labour and some cement are typically local. Structural steel, reinforcement of a specified grade, waterproofing systems, lifts, chillers, switchgear, curtain wall, sanitaryware and quality finishes are typically imported.
A building specified to international standards can carry a large imported share by value, and every point of that share brings with it freight, insurance, duties, port handling, inland transport and the working capital tied up while goods are in transit. Two projects with identical drawings and different specifications will not have similar budgets.
The practical lever is specification discipline: decide early which systems genuinely require imported quality and which can be met locally without compromising the building.
The cost of a container is not the freight rate. It is the freight rate plus demurrage risk, clearance time, inland haulage, and the schedule consequence of arriving late. Sites far from the port, or reached by roads that deteriorate in the rains, pay a premium that never appears in a supplier quotation.
Two practices reduce this: consolidating shipments so fewer, fuller containers move, and ordering long-lead items against the programme rather than against site progress. Contractors with established forwarding and customs relationships clear faster, and faster clearance is money.
The wet season compresses the working year for weather-sensitive activities. A programme that must complete earthworks, foundations, external concrete and roofing in the dry months carries either an acceleration cost or a delay cost — one of the two is always present.
The cost effect is indirect but large: standing time, temporary works for drainage and access, protection of materials, and the site overhead of a longer overall duration. Budgets that ignore the season are the ones that need revision.
Labour cost in the region is usually a smaller share of the total than in Europe, but productivity varies widely with supervision and training. The relevant comparison is not the daily rate but the cost per unit of finished work.
Projects that invest in trained foremen, clear method statements and inductions in the crew's working language complete more square metres per week than projects that hire the cheapest available labour. Expatriate supervision costs are real — travel, accommodation, rotation — and belong explicitly in the budget rather than in a general overhead line.
Where the public supply is intermittent, generators, fuel and their maintenance become a continuous project cost, not a contingency. Concrete curing, tower cranes, welding, dewatering and site accommodation all depend on it. Fuel price movement over a two-year project is a genuine budget risk and deserves a stated assumption.
Water supply for construction, site drainage and waste removal fall into the same category: small unit costs, large cumulative effect.
A budget that lacks these lines is not cheaper; it is simply incomplete, and the missing amounts appear later as variations.
Compare the exclusions, not the totals. The lower bid is often lower because it excludes customs, excludes generator running costs, assumes an unrealistic dry-season start, or specifies a lower grade of imported material. Ask each bidder for the same breakdown: local versus imported by package, lead times, exchange-rate basis, and what is explicitly not included.
Not responsibly, without a specification. The range between a simple locally-built structure and a fully serviced building to international standards is wide enough that a single figure would mislead. A meaningful estimate needs building type, storeys, structural system, facade, mechanical scope and finish level.
Labour is generally less expensive; imported materials, logistics, energy and finance are often more expensive. Which effect dominates depends on the imported share of the specification, which is why that share is the first thing to establish.
It should reflect design maturity and import exposure rather than a fixed percentage. A fully detailed design with local materials needs far less than a concept-stage project depending on several imported packages.
Imported packages are effectively priced in hard currency while parts of the project spend in local currency. State the assumed rate in the contract, agree who carries movement, and revisit the assumption at each major order rather than only at completion.