Outbuilding & Detached Extension Plans

We are Urban Archiworx Ltd, providing you with affordable and faster architectural plans for approval for planning permission & building control across the UK.

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Are you building an outbuilding in the garden?

When planning to build an outbuilding or a detached garage, there are several factors to consider to ensure that the project is successful. Detached garages are ideal for homeowners who need extra space for their car or want a separate area for storage, a workshop, or a home gym. However, building a detached garage requires careful planning and adherence to local building codes and regulations.

Outbuilding planning involves obtaining the necessary permits and following the local building regulations. The permit application process varies depending on the location but typically involves submitting a site plan and construction drawings to the local building department. It is crucial to ensure that the building plans comply with the zoning regulations, setback requirements, and other building codes.

Crafting Cozy Outbuildings and Detached Extensions

Certainly, it can be exciting time planning your build outbuilding in garden detached extension! We are at Urban Archiworx can take a way the stresses and worries that comes with managing this type of project from start to completion.

Planning permission for outbuilding or detached garage extensions

In the realm of property development, extending living spaces with outbuildings or detached garages can add value, functionality, and aesthetic appeal to a property. However, before embarking on such projects, it’s crucial to understand the intricacies of planning permission regulations.

In many cases, outbuildings and detached garages may fall under permitted development rights, allowing you to proceed without planning permission. However, certain conditions and limitations apply, depending on factors such as size, location, and intended use.

When permitted development rights do not cover proposed extensions, you must apply for planning permission from the local planning authority. Key considerations include the impact on the surrounding area, visual aesthetics, and compliance with local planning policies and regulations.

Building Regulations for Outbuilding or detached garage extension

Expanding residential properties with outbuildings or detached garage extensions offers you valuable additional space and functionality. However, alongside planning permission, adherence to building regulations is paramount to ensure safety, structural integrity, and compliance with legal requirements.

How much are plans for a Outbuilding extension plans?

Planning Package

Drawing Plans Only
£ 325 from
  • Site measurement up
  • Planning approval drawings
  • Submitting the relavant application
  • Site Plan
  • Location

Planning & Technical Package

Drawings Plans & Building Regulations
£ 495 from
  • As Planning Package
  • Construction Details
  • Working Drawings
  • Building Regulations
  • Liase with other Consultants

Building Regulations

Building Regs Only
£ 295 from
  • Building Specification
  • Sectional Drawings
  • Detailed Drawings
  • Call Outs

Our outbuilding & detached garage plans process


Start by consulting with one of our team to discuss your project requirements, objectives, and any constraints or regulations that may apply. Then a site survey will be conducted


A conceptional design will be drafted. Where one our architectural designers will design a detailed planning drawings​, that will include site plans, sections & floor plans.


Prepare and submit your planning application, including the planning permission drawings, to the relevant local planning authority. Be sure to include any required forms, fees, and supporting documents as specified by the authority.


If your planning application is approved, you will receive planning permission to proceed with your proposed development. You can then use the approved planning permission drawings to obtain building regulations approval and begin construction