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Building block properties

If you select a Building Block (or more than one block of this type only) in the main Display Window, then the following sub-panels will appear:

Building Blocks

Number of storeys / Number of Basements

You can choose a value from the drop-down menu, or you can type in a number directly. The 3D visualization, the Total GFA and Floor Area ratio will be updated.

Total GFA

This displays the total GFA for the block.

Floor Area Ratio

This displays the FAR (Floor Area Ratio) of the block.

Block Area

This displays the footprint of the block.

Plot Ratio

This displays the Plot Ratio of the block.

Levels - Fixed Base

If you check this box, then the block will be set at a constant level. You can set this fixed level by entering a value next to 'Fixed Base' (This will be a height above the ground plane).

Levels - Max Height

If you check 'Max Height' and enter a value, you will be warned if the building exceeds this height.

Setback Colour

This will be the colour of any setbacks from routes around the block. If you select 'Default', then it will be the same as the rest of the block. Setbacks are added to Routes in the Route Properties panel.

Floors and Subdivisions Panel

The settings for individual floors and subdivisions can be changed in this panel. First, select the floor or subdivision you want to edit by using the 'Select' drop-down menu at the top. The options available in this menu will change depending on how many floors and basements you enter in the 'Building' panel above.


You can enter a name for each floor.


Select a land use from the drop-down menu.

Floor-to-floor height

The 3D visualization will adjust depending on the value you enter, and will be indicated by horizontal lines on the side of the block.


You can choose either 'Default' or 'Custom'. If you choose default, then the floor will be coloured according to the land use colour, as specified in the Land Uses

Land Use Subdivision Grid

Here, you can add one or more land uses to the floor. Each land use created is called a 'Land Use Subdivision'

Click the green plus sign to add a land use. To remove a land use, select it and click the red delete button.

In this grid, you can click on a land use subdivision and select a land use e.g. 'Dwellings (C3)'. If you click in the column on the far right of the grid, you can edit the percentage of the GFA of that floor which is taken up by the land use subdivision. For example, if the land use is to cover the whole floor, you can enter 100%.

You can also enter an absolute value for the GFA in square metres or whichever area units are selected.

Note that you can enter values which add up to more than 100%. This provides flexibility in case you want to 'fine-tune' the quantities, or account for floor area on balconies or other overhangs which are not modelled in CityCAD.

Land Use Subdivision Panel

Here, you can edit detailed settings for land use subdivisions on the currently selected floor

To edit a land use subdivision, start by selecting the one you want to edit from the drop-down menu at the top of this panel.


Within the Floors and Subdivisions Panel are sub-panels:

Other options, such as 'Retail Use Options' will appear depending on which Land Use is chosen in the Use menu. For a full description see: Land Uses

Sub-Panel: General Floorspace Options

This is a sub-panel within the Floors/Subdivisions Panel. You can use it to change floorspace and unit settings for the selected floor.

Total GFA

Displays the total Gross Floor Area of the floor. In CityCAD, this is a calculation of the gross floorspace contained within the floor - with no deductions made for wall thicknesses, stair/lift cores or similar uses.

Net Floor Area

You can enter in the Net Floor Area either as a percentage of the GFA, or as an absolute value. If you type in a percentage, then the absolute value will be calculated automatically based on the GFA of the floor, and vice versa.


All floors can contain units. You can enter the total number of units or the average unit area. If you type in an average unit area, then the total number of units will be calculated automatically based on the GFA of the floor, and vice versa.


The General Floorspace Options panel contains padlocks, which allow you to 'lock' a value if the block is made larger or smaller in the Main Display Window.

By default, if you make a block larger or smaller, then the % of Net Floor Area, and the Number of Units will remain constant.

This means if you enlarge a block, the % of NFA will remain constant, and the absolute area of NFA will increase.

The total number of units will remain constant, but the average unit area will increase.

Sub-Panel: Land and Resource Use Options


You can set hours of activity for the block - either Default (as set in the Land Uses), 24-hour (all day), or specific times. These values will be used in the Land Use Summary tab.


This allows you to set the number of people in the block. If you set 'Use Estimate' then it will use the default setting for this block depending on the settings in the Land Use Manager, or if you choose 'Set at:' and enter a number it will be fixed at this number.

Environmental Rating

You can choose a Conservation value from the drop-down panel. This is an embedded custom parameter, and multiple choice options can be edited in the Preferences window.


You can choose a Ownership description from the drop-down panel. This is an embedded custom parameter, and multiple choice options can be edited in the Preferences window.

Conservation Value

You can choose a Conservation value from the drop-down panel. This is a reference which can be used to create diagrams using Block Shading or in the 2D drawing window

Sub-Panel: Resource Use Options

You can enter energy and resource use options for the block in this panel.

If you choose 'Use Default', then the default settings for this type of block will be used, as defined in Preferences.

If you choose 'Custom', then you can enter custom values that will apply to this block only.

Embodied CO2

This is a measure of the CO2 used in the construction of the buildings in this block.

Rate and Time Menus

If you click on the first drop-down menu you can choose whether the values you enter are:

The second drop down menu allows you to enter the time period for which the values are entered:


You can then enter values for:


If you are used to dealing with other units of measurement (eg. gallons of water, or square feet of area) then you can go to the Units section of the Preferences dialog and set your preferred units.

Sub-Panel: Custom Parameters

This panel is used for entering custom parameters which are specific to a floor, as opposed to the block as a whole.

Block Appearance

You can enter settings for illustrative visualizations on the block. See Block Appearance for more details.

Custom Parameters

You can specify custom parameters for the currently selected block. To edit which custom parameters are available, go to the Preferences window.

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