How to Use CAD Blocks

What are CAD Blocks?

Computer-Aided Design (CAD) blocks are pre-drawn, 2D or 3D objects that architects can insert into their drawings to save time and improve accuracy. These blocks can include anything from basic shapes to complex designs and symbols. They are essential components in the design process as they help architects to focus on the creative aspects of their work while providing a shortcut to creating precise and accurate drawings.

AutoCAD blocks are used across a variety of industries, including architecture, engineering, construction, and product design. They save time and increase efficiency by providing a library of pre-drawn objects that can be easily inserted into their designs. 

In this blog post, we’ll explore the different types of CAD blocks and how to use them effectively in your work. We’ll also discuss where to find autoCAD blocks, how to modify them, and how to create your own. By the end of this post, you’ll have a solid understanding of how to make the most of CAD blocks in your design process.

FIA Door Handles CAD Blocks

Types of CAD blocks

AutoCAD blocks are in the format of dwg files.There are different types of blocks available that serve various purposes. Understanding the different types of autoCAD blocks can help you choose the right one for your design needs. The main types of CAD blocks include:

1. Standard Blocks: These are pre-drawn 2D or 3D objects that are used to represent commonly used items such as doors, windows, furniture, and fixtures. Standard blocks are typically created by manufacturers and are available in built-in libraries or online resources. 

We have a vast number of standard free CAD blocks available on First In Architecture covering a variety of categories that you can use in your cad drawings. Standard Blocks are static and cannot be modified once inserted into a drawing.

Standard CAD block
2. Dynamic Blocks: These are similar to standard blocks but with added flexibility. Dynamic blocks allow for customisation and modification after insertion into a CAD drawing.

This means that you can adjust the size, shape, and properties of the block to fit your design needs. Dynamic blocks are created using the Block Editor tool in CAD software. 

Dynamic CAD block
3. Parameterised Blocks: These are dynamic blocks that have additional intelligence built into them. Parameterised blocks contain properties that allow for automatic adjustment of the block’s size and properties based on specific parameters.

For example, a window parameterised block may have adjustable width, height, and glass thickness properties. This means that when you change the parameter values, the block automatically adjusts accordingly.

Parameterised CAD block
Understanding the differences between these types of CAD blocks can help you choose the right block for your CAD drawings and design needs. Standard blocks are useful for simple designs where customisation is not required. Dynamic blocks are ideal for more complex designs that require customisation, while parameterised blocks are best for designs that require automatic adjustments based on specific parameters.

How to Find CAD Blocks

CAD blocks are available in built-in libraries, online resources, and custom-made blocks. Here are some ways to find CAD blocks:

1. Built-in Libraries: Most CAD software comes with built-in libraries that contain a variety of standard blocks. These libraries can include furniture, fixtures, appliances, doors, and windows, among others. These blocks can be easily inserted into your drawing, saving you time and effort.
2. Online Resources: There are several websites where you can find free or paid CAD blocks. These websites offer a vast collection of CAD blocks in different categories such as architecture, engineering, and product design. Some popular websites for CAD blocks include our very own free CAD blocks library, DWG Models and DWG Free.

When downloading CAD blocks from the internet, ensure that they are compatible with your CAD software before inserting them into your drawing file.

3. Custom CAD Blocks: You can create your own CAD blocks by drawing them from scratch or modifying existing blocks to fit your design needs. Custom CAD blocks can save you time and effort in the long run as you can reuse them in future designs. Creating custom CAD blocks is pretty easy and gives you control over exactly how you want the drawing to look.
When searching for CAD blocks, it’s essential to ensure that they are compatible with your CAD software. Some CAD software may have specific file formats or block naming conventions. Additionally, it’s vital to organise your CAD blocks properly, whether they are built-in, downloaded, or custom-made. This will make it easier for you to find and use the blocks or dwg files in your future designs.

All of the CAD blocks on First In Architecture are in .dwg files format, and usually in both metric and imperial options. We draw all of our blocks at 1:1 scale and make sure the files are clean and tidy and correctly layered and set up. This means they are easy to use right off the bat, just add them to your drawing, no messing about.

How to Use CAD Blocks

Using CAD blocks can save you time and effort in your design process. Here’s how to use CAD blocks effectively:

1. Inserting CAD Blocks: To insert a CAD block into your drawing, open the block library and select the block you want to use from the library or click to search for a file in your own folders. Click on the insertion point in your drawing where you want to place the block. You can then adjust the size and position of the block as needed.
2. Use Dynamic Blocks: Dynamic blocks are blocks that have adjustable parameters, allowing you to modify their properties quickly. Using dynamic blocks can help you save time in the long run, as you can adjust them for various design scenarios.
3. Organising CAD Blocks: It’s essential to organise your CAD blocks to make them easily accessible in future designs. Create folders or libraries for different types of blocks, such as furniture, fixtures, or symbols. This will help you quickly find and insert the blocks you need. You can check out our CAD block sets here.
4. Creating Custom CAD Blocks: If you can’t find a suitable CAD block for your design, you can create your own. Draw the block using the CAD software’s drawing tools or modify an existing block to fit your design needs. Once you’ve created a custom block, save it in a library for future use.
Editing a CAD block

Tips for Using CAD Blocks

Using CAD blocks can be a valuable tool in your design process. Here are some tips to help you make the most of them:

1. Use Standard Blocks: When possible, use standard blocks from built-in libraries or reputable online resources (like ours). This will ensure that you download cad blocks that are compatible with your CAD software and other team members’ software, and it can save you time in creating custom blocks.
2. Modifying CAD Blocks: To modify a CAD block, select the block and use the CAD software’s editing tools to adjust its properties. Just double click on the block to open the editor, or right click and select the Block Editor. If you’re using a dynamic or parameterised block, you can also adjust its properties through the Block Editor.
3. Keep Blocks Organised: Organising your blocks into libraries or folders based on their type can help you quickly find and insert the blocks you need in future designs. Keeping your blocks organised also makes it easier to share them with team members.
4. Create Custom Blocks: If you can’t find a suitable block, create your own. Custom blocks can save you time and ensure consistency in your design. Additionally, creating custom blocks can be a fun and creative process that can help you develop your CAD skills.
5. Check Block Scale: When inserting blocks into your drawing, ensure that the block is the correct scale. Blocks that are too large or too small can throw off the entire design.
6. Use Layer Management: Use layer management to organise your blocks and maintain consistency in your designs. Assigning blocks to specific layers can also help you quickly turn off or on specific elements of your design.
7. Use Block Libraries: If you frequently use the same blocks, consider creating a custom library for them. This will save you time by allowing you to quickly access them in future designs.
By following these tips, you can effectively use CAD blocks to streamline your design process, save time, and achieve better design results.


Overall, CAD blocks can be a powerful tool for designers, architects, and engineers. They can help you save time, improve collaboration, and achieve better design results. By following the tips outlined in this article, you can make the most of CAD blocks and take your designs to the next level.

Make sure you take some time to check out our own free AutoCAD blocks. The majority of our CAD blocks are free and easy to download from our cad library. We pride ourselves in providing correctly scaled clean CAD blocks for you to drop directly into your drawings, saving you time and allowing you to focus on the import bit, the design work. 

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