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Estimation & coûts

Déposer les quadros NBR 12721 pour une incorporação

Mesurez les surfaces que définit la norme, construisez le custo global pour le padrão du bâtiment, comparez-le au CUB publié, produisez les quadros, répartissez le coût sur chaque unité selon sa fração ideal et assemblez le memorial pour l'enregistrement.

6 étapes20 minPromoteur / maître d'ouvrageÉconomie de la construction / métréBureau de conception / d'ingénierie

Comment ça marche, étape par étape

6 étapes à travers la plateforme - ce que vous faites à chacune et pourquoi c’est important.

1

Measure the areas the way the standard defines them

Métré

Take off the private, the common and the total real area of every unit, then convert them into the equivalent area of construction the way NBR 12721 prescribes, so that covered and uncovered work are weighted rather than added. Keep both sets of figures, because the quadros ask for both.

Pourquoi: Every figure downstream is a rate multiplied by one of these areas, so an area computed the ordinary way rather than the way NBR 12721 defines it is wrong in the same direction on every unit and in the registered document. Corrections after registration are a rectification at the registry office, not an edit.

EntréeApproved architectural drawingsUnit schedule of the buildingRésultatReal areas per unitEquivalent area of construction
2

Build the custo global for the padrao you are building

Base de données de coûts

Price the building at the standard of finish it is actually specified to, keeping the structure, the finishes and the services apart, and separate what the standard treats as the building from what it treats as land, licences and marketing. Read out the cost per square metre of equivalent area.

Pourquoi: The rate per square metre is the figure everyone compares, and it only means anything when the numerator and the denominator were built to the same rules. Costs that do not belong to the construction inflate the rate and make the building look expensive against every published reference, which is a conversation with a bank rather than with an estimator.

EntréeSpecification and standard of finishEquivalent area of constructionRésultatCusto global of the buildingCost rate per square metre
3

Place the rate against the published CUB

Indice des prix

Load the CUB published for the state and the building type that matches yours, put your rate beside it, and write down what the difference is made of: the items the CUB expressly leaves out, such as foundations, lifts and external works, and the specification choices that are genuinely yours.

Pourquoi: The CUB is computed under NBR 12721 for a standard project and deliberately excludes several real costs, so a building priced honestly is expected to sit above it. What has to exist is the sentence saying by how much and why. Without it, the same gap reads to a buyer or an auditor as a padded cost rather than as foundations.

EntréeCost rate per square metrePublished CUB for the stateRésultatDifference against the CUBReason recorded for the gap
4

Produce the quadros in the form the standard prescribes

Rapports

Generate the numbered quadros NBR 12721 lays out, from the areas of each unit through to the cost of construction and its distribution, and check that the same total appears identically in every quadro that carries it. Keep the reference month of the cost on every sheet.

Pourquoi: The quadros are read by a registrar who checks them against each other rather than against the building, so an internal disagreement between two sheets stops the filing even when both figures are individually defensible. Generated from one source they agree by construction, which is the only reliable way to make a set of twelve tables consistent.

EntréeCusto global of the buildingReal areas per unitRésultatQuadros report in the prescribed formTotals agreeing across quadros
5

Carry the cost onto each unit by its fracao ideal

Promotion immobilière

Distribute the construction cost across the units in proportion to the fracao ideal recorded for each one, and hold that distribution beside the sale prices so the margin on a small unit can be read separately from the margin on a penthouse.

Pourquoi: A development sold at one price per square metre across every unit is usually selling the ground floor at a loss and does not know it, because the cost per square metre is not flat once parking, terraces and common areas are allocated. The filed distribution is the only version of that arithmetic both the buyer and the developer are looking at.

EntréeQuadros report in the prescribed formFracao ideal per unitRésultatCost carried onto each unitBasis for the sale price
6

Assemble the memorial de incorporacao for registration

Documents

Bring the quadros together with the title, the approved drawings, the licences and the technical responsibility notes into the set that goes to the registry office, and keep the filed version untouched afterwards as its own record.

Pourquoi: Lei 4.591 of 1964 makes registration of the memorial the condition of selling units that are not built, so this set is what allows the sales to start, and every buyer contracts against the version that was filed. A working copy that keeps evolving in the same folder is how a later dispute finds two memorials, and only one of them is the one anybody agreed to.

EntréeQuadros report in the prescribed formTitle, licences and drawingsRésultatMemorial assembled for filingFiled version kept as issued
Modules

Modules de ce playbook

6 / 190 modules de la plateforme

Le marché pour lequel ce cas est écrit

Brésil

Tout dans ce cas suit la façon dont les travaux sont métrés, chiffrés et payés sur ce marché. Les formulaires, la décomposition des coûts et les règles de paiement sont ceux qui y sont utilisés, pas une version générique.

Normes qu’il suit

  • Lei 14.133
  • SINAPI
  • ABNT NBR 12721

Vous n’avez rien de tout cela à paramétrer à la main. Au premier démarrage, la plateforme demande sur quel marché vous travaillez. Choisissez celui-ci et elle règle la langue de l’interface, charge la base de coûts correspondante, enregistre la classification des coûts et ajoute un projet d’exemple que vous pouvez ouvrir tout de suite.

Les contrôles propres à ce marché sont eux aussi fournis avec la plateforme. Une fois activés, un devis auquel il manque quelque chose que le marché attend est signalé pendant que vous y travaillez, et non après l’envoi de l’offre.

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