Single Storey Extension Plans
We provide professional architectural services, including Planning Applications and Building Regulations drawings for single storey extensions in London & the South East.
Whether you want to create an open-plan kitchen diner, a wrap-around extension, or even a new porch, our architectural designers and RICS Chartered Surveyors can prepare professional architectural drawings and plans for your project.
To speak to us about your single storey extension plans, call 020 7112 8877, or visit our contact page.
Prepare Design
We will then prepare accurate and fully-compliant planning drawings and building regulations drawings for your proposed extension or conversion. We usually complete the initial draft within 10 working days from the date of the measured survey.
Review & Submit
Working with you, we will then refine the design ensuring it meets the ambitions you have for your property. Once you are completely happy, we will submit and manage the application with your Local Authority through to decision.
Initial Consultation
We will discuss your aims and ambitions with you to get a deep understanding of what you're hoping to achieve with your single storey extension plans.
Measured Survey
Once we have a good understanding of your requirements, we will undertake a measured survey of your property to allow us to prepare accurate existing drawings.
Our Single Storey Extension Service
Our team has prepared professional planning applications for single storey extensions and conversions across London and the South East.
We follow a straightforward process to streamline your planning application and maximise your chances of gaining approval.
Single Storey Extension FAQs
Below are answers to some of the questions we are most commonly asked about single storey extensions.
Will I need planning permission for a single storey extension?
Many single storey extensions can be built without needing planning permission. These types of extensions fall under what are known as “permitted development rights“, however, there are several restrictions. If your proposed plans do not meet these restrictions, then a planning application will be required.
Restrictions under permitted development rights for home extensions include that:
- The single storey extension must not extend beyond the original house by more than 4m if the house is detached, or 3m for any other type of house. Where the land is not designated land under Article 2(3), this limit is increased to 8m for detached houses and 6m for other types of house.
- The single storey extension must not be higher than 4m.
- No more than 50% of the curtilage of the dwelling will be covered by buildings (excluding the original dwelling) – this includes sheds and outbuildings.
- No extension will be forward of the principal elevation or side elevation fronting a highway.
- If the extension is within 2m of a boundary, the eaves height should not exceed 3m.
- The extension should not include a balcony or raised platform.
- Materials that match the existing should be used.
This is not an exhaustive list, and there are other considerations as well. We would recommend reading the Planning Portals guide to Permitted Development Rights to get a good understanding of whether your proposal needs planning permission.
If your proposed single storey extension doesn’t meet these criteria then you will need to apply for planning permission.
Our advice is that even if your proposed single storey extension falls within permitted development rights, you apply for a Lawful Development Certificate which will confirm in writing that your extension meets permitted development. This will make selling the property considerably easier later on.
Why should I get a single storey extension?
A single storey extension can completely transform the spacial feeling of the property. Commonly, homeowners want to increase the living space, and the creation of an open plan area at the rear of the property not only achieves increased floor area but also improves natural lighting and modernises the property. This inevitably adds value and makes the property more attractive to potential buyers.
What are the most common layouts for two storey extensions?
The most common layouts for a single storey extension are either to the rear of the property or to form a wrap-around extension.
Both options create an enlarged living space that improves the property, however, with a wrap-around, that space is larger and often allows for the creation of an additional reception room or bedroom.
Home Extension Services
We offer a range of architectural design services for residential extensions, conversions, and new builds. Select a service to find out more.
Planning Applications
Professional architectural drawings for planning applications for extensions, conversions and new builds.
Building Regulations
Detailed Building Regulation drawings and notes for residential extensions and conversions.
Projects we work on
We provide architectural services for a range of residential developments, including:
