Oïkos GPI

Service

Construction economics

Estimates structured by CFC, analysis of options, preparation of tender documents and comparison of offers on a common basis. Construction economist, Switzerland-wide.

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What it covers
  • Estimates structured by CFC, drawn up with our database (Attic+).
  • Analysis of the options and their financial impact, before design choices are made.
  • Preparation of tender documents and comparison of offers on a common basis, differences explained.
  • Checks on compliance with SIA standards in parallel.
Who it is for

An architect who wants the cost in parallel with the design. A general or total contractor putting together an offer. A property management agency that needs to prioritise works across several buildings.

OwnerI own a property or a plotGeneral or total contractorI am a general or total contractorArchitectI design the projectProperty management agencyI manage a property portfolioPublic authorityI represent a public authority
Where this fits in our method

The phases concerned.

  1. STAGE 2Financial plan
  2. STAGE 4Consultation
The phases explained
PHASE2

Financial plan

Once the direction has been chosen, the budget is structured by CFC (Swiss construction cost classification) and kept up to date at every stage of the project.

  • All CFC items costed using our own database
  • A financial plan updated at every stage
  • Options weighed up, with their financial impact

Tool: Attic+ and SAPRelated service: Construction economics →

PHASE4

Consultation

Contractors are consulted on a common basis. Offers are compared item by item and the differences are explained. The client chooses which contractors to proceed with.

  • Tender documents prepared on a common basis
  • Offers compared, differences explained
  • Offers and deadlines tracked in a single tool

Tool: MondayRelated service: Construction economics →

See the five phases of the method →

Frequently asked questions
Do you charge commissions to contractors?

No. We charge only our fees, which correspond to the time you would otherwise have to devote to it yourself, with the trade expertise and the tools that go with it. With no commission, we have no interest in favouring one contractor over another.

Who chooses the contractors?

The client. Following our expert assessment, the client decides which subcontractors to proceed with. Contracts and payments remain directly between the client and the contractors.

Does a study or advice commit me to entrusting you with construction management?

No. A study or advice is never conditional on a construction management mandate. Each assignment has a scope, deliverables and fees defined by offer.

What does “open-book execution” mean?

Prices, tenders, contracts and decisions remain visible to the client, from the first study to handover.

Further reading

Related resources.

Material pricesConstruction prices 2026: what the indices sayConstruction prices are not rising uniformly. Depending on the trades and types of work, the differences are clear. A reliable budget relies on these indices, not on an average.CostingComparing contractors’ offers: the same basis, or nothingComparing two offers is not comparing two totals. It means checking that they describe the same thing, at the same level of detail.CostingThe CFC: the common language of construction costIn Switzerland, the costs of a construction project are described in a common language: the CFC (Swiss construction cost classification).

Next service: Engineering office →

Present your project to us.

A first conversation, without obligation: the address or plot, your objective, an indicative budget.

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