--- title: "The Units Layer: Dynamic vs. Kit of Parts" description: The unit editor is used to create and customize buildings. --- [Skip to content](https://support.testfit.io/knowledge/lower-density-unit-editor#main-content) [![](https://support.testfit.io/hs-fs/hubfs/primary%20wordmark.png?width=150&height=113&name=primary%20wordmark.png)](https://testfit.io/?hsLang=en) Open main navigation Close main navigation - - [Contact us](https://support.testfit.io/knowledge/kb-tickets/new) [Contact us](https://support.testfit.io/knowledge/kb-tickets/new?hsLang=en) Welcome to the TestFit Knowledge Base - There are no suggestions because the search field is empty. 1. [TestFit Knowledge Base](https://support.testfit.io/knowledge?hsLang=en) 2. [Site Development](https://support.testfit.io/knowledge/site-development?hsLang=en) 3. [Housing - Low Density & Subdivision](https://support.testfit.io/knowledge/site-development?hsLang=en#housing-low-density-subdivision) December 2, 2025 # The Units Layer: Dynamic vs. Kit of Parts ## The unit editor is used to create and customize buildings. ### **Dynamic  Units** You can customize the individual unit dimensions in the ***Dynamic Units*** section. While the unit clusters or buildings can be customized in the ***Townhouses*** section. ![01 Units Layer](https://support.testfit.io/hs-fs/hubfs/01%20Units%20Layer.jpg?width=423&height=1279&name=01%20Units%20Layer.jpg) --- ### **Kit of Parts** To get to the unit editor, go to ***low density housing \> edit units \> convert to kit of parts*** ![02 Units Layer](https://support.testfit.io/hs-fs/hubfs/02%20Units%20Layer.jpg?width=670&height=437&name=02%20Units%20Layer.jpg) --- Once you get to the unit editor, you'll see: 1. The list of databases 2. The list unit types in the project 3. The unit layouts in the project ![03 Units Layer](https://support.testfit.io/hs-fs/hubfs/03%20Units%20Layer.png?width=670&height=384&name=03%20Units%20Layer.png) Clicking on one of the units will bring you into the building editor. --- ### **Building Editor** ![04 Units Layer](https://support.testfit.io/hs-fs/hubfs/04%20Units%20Layer.jpg?width=670&height=389&name=04%20Units%20Layer.jpg)The building editor allows you to modify the following: - **Name** - **Width** - **Depth** - **Floors** - **Bed Count** - **Bath Count** - **Display Color** - **Staircase** - **Garage** - **Entry** - **Bay** - **Define the joined edge (back or side)** - **Add additional entries, bays, or balconies** --- ### **Customizing the garage** Easily control the location and size of garages; or disable them completely ![05 Units Layer](https://support.testfit.io/hs-fs/hubfs/05%20Units%20Layer.jpg?width=670&height=352&name=05%20Units%20Layer.jpg) --- ### **Adding chamfered bays** ![06 Units Layer](https://support.testfit.io/hs-fs/hubfs/06%20Units%20Layer.jpg?width=670&height=286&name=06%20Units%20Layer.jpg) ![07 Units Layer](https://support.testfit.io/hs-fs/hubfs/07%20Units%20Layer.jpg?width=670&height=286&name=07%20Units%20Layer.jpg) --- ### **Placing Stairs** ![08 Units Layer](https://support.testfit.io/hs-fs/hubfs/08%20Units%20Layer.jpg?width=670&height=438&name=08%20Units%20Layer.jpg) --- ### Inserting a background image You can also insert an underlay image to display and represent real floor plans.   - 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