Documents explained

Explaining the difference between planning, technical, structural drawings and calculations

Charlie Chamberlayne avatar
Written by Charlie Chamberlayne
Updated over a week ago

To get accurate quotes from contractors, you'll first need to upload all relevant project documents.

Depending on your project type you’ll be compiling different drawings. Below is an explanation of the main types of documents you'll need to know about.

💭 Need help deciding which documents you'll need for your project?

Go to our breakdown to make sure you submit recommended documents for your project on Weaver.

Planning drawings

Planning drawings illustrate the proposed design and layout of a building or structure and are often used to obtain planning permission from your local authority. Typically they show dimensions and orientation of the building, as well as any external features like doors, windows, and landscaping. They include:

  • floor plans (existing & proposed plans)

  • site location plans (how your property sits within local environment)

  • elevations & sections (shows how your project is built vertically and in section)

  • often 3D renderings included too

Technical drawings

Technical drawings, also known as engineering drawings or detailed designs, are detailed illustrations that convey technical information about the structure of your property.

Technical drawings often include a detailed set of construction notes and full product specific information, including dimensions, materials, finishes, and assembly instructions to allow the contractor to provide an accurate price.

They normally include:

  • floor plans (typically existing & proposed plans)

  • elevations & sections (shows how your project is built vertically and in section)

  • electrical plans (lighting and wiring)

  • mechanical plans (plumbing, heating & ventilation)

  • detail drawings (zoomed in detail of how a component is built)

  • roof plans & detail sections

Structural calculations and drawings

Structural drawings

Structural drawings are technical illustrations displaying the design and layout of the structural components of a building. Typically they include information about the materials used and how the components are connected.

They normally include:

  • structural elements such as walls, beams, and columns, including their size and design

  • reinforcements detailing, including the materials (concrete, steel or timber)

  • dimensions & mathematical loadings analysis

Structural calculations

Structural calculations involve using mathematical formulas and engineering principles to determine the strength and stability of a building or structure.

This is used to ensure that the building can withstand the loads and stresses it will be subjected to over its lifetime.

Schedule of works

A schedule of Works acts as a type of shopping list for your project. It allows the contractor to identify work and materials required to complete the works and calculate the quantities required.

It's often produced by designers alongside detailed drawings and specifications.

While not essential, it is highly recommended that you provide a Schedule of works. Not sure how? Take a look at our 4 Tips for creating the perfect Schedule of works.

If you have any questions, feel free to reach out to us via email on or Live Chat. We’d love to hear from you ✨

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