Garage plans and design criteria a useful guide with 3D examples and DWGs_BIM-software-Edificius

Garage plans and design criteria: a useful guide with examples

How to design garage plans: the complete guide with standards, layouts, examples, projects to download together with videos

When searching for garage plansyou can find plenty of results illustrating how to arrange garage spaces or even find many ideas for “DIY” projects too.

In this insight we’ll be providing a technical guide to analyse different garage definitions, types, standards, regulations, layouts and other helpful design elements. Further on we’ll also examine models of underground, outdoor, public or private garages and highlight the minimum and recommended measures together with other important design criteria, such as safety requirements.

Layouts and project models in the native .EDF format are available for download and to use as your free design resource reference. To open these file formats, you can download the free trial version of Edificius  and open project files and check out the various plan designs and other project documentation.

Download the BIM model of the entire project  (.edf file)

Garage plans

Garage interior view

Garage plans: definition and classification

With the term “Garage” (or automated parking garage or carport) it is generally intended as a space where one or more vehicles are parked. These areas mainly refer to covered areas where motor vehicles are either repaired, serviced, parked etc. Sheds that are open on at least two sides are not considered garages.

Garage plans

Underground garage floor plan

Based on certain construction characteristics, garages can be classified:

according to the use of the building as:

  • detached, located in buildings exclusively for parking use;
  • mixed, all the rest.

according to the location with respect to the terrain as:

  • underground;
  • outdoor.

according to certain operations:

  • guarded, the one which is equipped with automatic control systems to prevent fire spread, or provided with continuous surveillance systems;
  • unguarded, all the rest.

according to the organization of internal spaces as:

  •  box garage;
  • open space.
Garage plans

Garage box for disabled

Charging points for electric vehicles

In recent years the high innovation introduced in the automotive industry, with special regard to electric vehicles, has raised the need for electrical charging points to be installed. When designing a garage, it’s extremely important to carry out the necessary checks to ensure that a property can accommodate such charging facilities.

Garage or Car Port Planning Permissions (U.K.)

This section provides you with general information to help you comply with the Building Regulations when constructing a garage within the boundaries of an existing property.

Building Regulations approval is required for building a garage but planning permission may not be in all instances – the local authority should be able to advise as to whether it planning permission is needed or not. Planning permission is not required for a detached garage or car port provided that:

  1. The garage is used for domestic purposes only.
  2. The ground area covered by the garage/car port and any other buildings within the boundary of the property, excluding the original house, is not more than half the total area of the property.
  3. No part of the garage is in front of the principal or side elevation of the original house that faces onto a road.
  4. The maximum height of the garage/car port is 4 metres.
  5. The maximum eaves height of the garage/car port is 2.5 metres if it is within 2 metres of the property boundary.
  6. No part of the garage is within 3.5 metres of the boundary with a road to the rear of the house.

Building a detached garage of less than 30 square metres floor area would not normally need building regulations approval if:

  • the floor area of the detached garage is less than 15 square metres.
  • the floor area of the garage is between 15 square metres and 30 square metres, provided the garage is at least one metre from any boundary, or it is constructed substantially of non-combustible materials.

For more info, check the relevant Planning Portal document.

How to design garage plans: characteristics and measures

garage render

Outdoor garage render

It is fundamental to consider the minimum dimensions for your garage project.

As seen in our previous article “Car parking design: types, examples and BIM model” the basic sizing of a garage  depends on the overall dimensions of a car, therefore 2,50 mt. x 5,00 mt. (8.20′ x 16.4′) for a standard garage and 3,20 mt. x 5,00 mt. (10.4′ x 16.4′)  for parking spaces for the disabled (parameters that vary a little, depending on the different national regulations).

Box garage mesurements

Single box floor plan

A comfortable solution is 3 mt. x 6 mt. (9.8′ x 19.6′) for standard garage space and 3,75 mt. x 6 mt. (12.3′ x 19.6′) for parking spaces for the disabled.

Extra lateral spacing must be provided to ensure that the vehicle doors can be comfortably opened by passengers on either side.

The garage height should be at least 2,40 mt. (7.8′)

The opening measures provided should be at least 2,40 mt. (width) x 2,20 mt. (height). (7.8′ x 7.2′).

garage cross-section

Additional elements to consider in garage plans are:

  • washable walls
  • concrete floor or oil-resistant clay tiles
  • proper lighting
  • anti-slip flooring for ramps used in underground garages
  • a rigid surface for getting on and off in front of the garage
  • a space for storing winter tires and car accessories
  • a space for storing other objects such as skis, bicycles, luggage racks, work and garden tools, etc.
  • installation of the automatic opening systems with remote control.
planning a garage

garage cross-section

Careful design of walls and ceilings should not be overlooked and, most of all, it is fundamental to take in consideration that they need to be fireproof.

Ventilation of car parks (U.K.)

Approved Document F provides guidance on building ventilation in a domestic or non-domestic structure, inluding garages and car parks. The requirement will be satisfied for car parks below ground level, for enclosed-type car parks and for multi-storey car parks if predicted pollutant levels are calculated, the ventilation rate is designed and equipment is installed to limit the carbon dioxine to:

  • an avarage concentration of not more than 30 parts per million over an eight-hour period
  • peak concentrations, such as by ramps and exits, of not more than 90 parts per million for periods not exceeding 15 minutes

Alternatively, the following guidance would satisfy the requirement:

  • naturally ventilated car parks. The provision of well-distributed permanent natural ventilation, e.g. openings at each car parking level with an aggregate equivalent area equal to at least 1/20th of the floor area at that level of which at least 25% should be on each of the two opposing walls
  • mechanically ventilated car parks. Either the provision of both permanent natural ventilation openings of equivalent area not less than 1/40th of the floor area and a mechanicl ventilation system capable of at least three air changes per hour; or for basement car park, the provision of a mechanical ventilation system capable of at least six air changes per hour. For exits and ramps, where cars queue inside the building with engines running, provisions should be made to ensure a local ventilation rate of at least ten air changes per hour.

Download section

Floor plans and sections of the different types of garages that we have analyzed so far are available below to download.

Download the project floor plans

Download the project cross-sections

Parking areas design

Garage plans and car parking design share very similar problems and aspects that are somehow connected. Read our article regarding ‘Car parking projects‘.

Power point