Skip to content
English
Contact us
  • There are no suggestions because the search field is empty.

How do I submit my proposal?

In this article, you will learn how to properly submit your proposal to the general contractor as a subcontractor, including how to complete budget lines and add attachments.

What will you find in this article?

  • Getting started: The three ways to open the proposal module.

  • Step-by-step submission guide: From budget rules to final submission.

  • Documents and messages: How to add files and explanations.

  • Review: Using the summary before submission.

Summary

You start submitting your proposal via the green button in the request email or directly from your project overview in 12Build. The process consists of up to five steps, during which you enter prices (if requested), upload documents, and write an accompanying message before you finally send the proposal.

Prerequisites and Target Audience

This article is intended for subcontractors who have received a digital Request for Proposal from a general contractor via 12Build. You need access to your 12Build environment to complete all the steps.

Starting the proposal module

There are three ways to access the screen for submitting your proposal:

  1. From the Request for Proposal: Click the green Indienen offerte button in the email you received from the general contractor. You will be redirected to the correct page immediately.

  2. From the project overview: Log in to 12Build and click the green “Submit Proposal” button on the dashboard for the relevant project.

  3. From the Project menu: Within a specific project, select the "Submit Proposal" option from the menu.

Submit your proposal in 5 steps

Once you’ve launched the module, follow these steps:

Step 1: Budget Rules (optional)

If the general contractor has set up budget lines, enter the prices here.

  • In the last column, indicate whether the line item is included in your proposal.

  • If no rules have been set up, the system will automatically skip this step.

Step 2: Documents

Here you can add your official quotation documents.

  • Drag your files to the upload area or click Browse to select the file.

  • Also select any general documents (such as your Terms and Conditions) that are in your profile and that you want to include.

Step 3: Message

Write a cover letter for the general contractor here. You can also use a previously created message template here.

Step 4: Summary

Check this overview to ensure all details, prices, and attachments are correct.

  • Use the Previous and Next buttons at the bottom left to make any corrections in the previous steps.

Step 5: Send

Once the summary is correct, click the Send button. Your proposal has now been officially submitted to the General contractor.

Frequently Asked Questions (FAQ)

Question: Can I still change my proposal after clicking 'Send'? Answer: Once a proposal has been sent, it is immediately visible to the general contractor. Do you want to send a revised version? Then go through the process again; the general contractor will then see your most recent submission.

Question: Why don’t I see Step 1 (Budget Rules)? Answer: This step only appears if the general contractor has added specific bill of quantities or budget rules to the request. If this is not the case, you’ll start directly with uploading your own documents.

Troubleshooting

  • Symptom: I cannot upload my file in Step 2.

    • Cause: The file type may not be supported, or the file is still open in another program.

    • Solution: Close the document on your computer and try dragging it again. Preferably use PDF files for proposals.

  • Symptom: I cannot proceed to the next step.

    • Cause: A required field (such as a total price or a specific document) has likely not been filled in yet.

    • Solution: Check for red error messages on the screen and fill in the missing information.