While there are many important factors to consider when thinking about a loft conversion, planning permission should certainly be at the top of your list of priorities. Without securing proper planning permission, your loft conversion will not be able to go ahead. Here’s some guidance on how to ensure your project runs without a hitch.
Smaller projects may sometimes fall under permitted development rights, which allow homeowners to make alterations to their properties without having to apply for permission. However, there are several factors which can affect a homeowner’s claim to permitted development rights. If your conversion:
- Exceeds specific height limits
- Involves structural alterations
- The installation of balconies or terraces
You will have an increased risk of needing planning permission to proceed. If you live in a conservation area or a listed building, limits on your freedoms are going to be even stricter.
Checking whether planning permission is required before getting to work on your loft conversion is paramount. Failing to do so can lead to several serious consequences. Cease and desist orders will reverse all the time and money already spent, while fines can leave you facing significant financial difficulties in the wake of an already expensive project. Many people choose to install a loft conversion to increase the marketability of their properties. However, making unauthorised alterations can actually be counterproductive to this end, and can steer potential buyers away.
If you’re unsure how to check for planning permission, you can:
- Consult your local council’s planning department
- Familiarise yourself with what is acceptable under permitted development rights
- Consider getting some professional advice from loft conversion experts like Simply Easy Refurbs
Loft conversions require detailed planning and strict adherence to regulations to be a success. But businesses like ours are here to help, and at the end you will have a stunning new living space to increase both your quality of life and your property’s market value.
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Key Conditions for Loft Conversion Planning Permission
The Town and Country Planning (General Permitted Development) Order 2015, Schedule 2, Part 1, Class B, outlines the criteria for a loft conversion to be considered permitted development.
According to development rules, any loft extension must:
- Not extend beyond the existing roof slope on the principal elevation facing a road.
- Use materials that match the appearance of the existing house.
- Not exceed the highest point of the existing roof structure.
- Avoid the addition of raised platforms, balconies, or verandas.
- Ensure side-facing windows are obscure glazed to maintain privacy.
- Remain within the volume allowance: 40 cubic metres for terraced houses and 50 cubic metres for semi-detached houses.
If the property is located in conservation areas, national parks, or world heritage sites, additional restrictions may apply, and planning permission may be required. Homeowners should check with their local council to confirm development rights before proceeding with any roof extensions.
Types of Loft Conversions and Their Permitted Development Status
Different types of loft conversions have varying requirements when it comes to planning permission. Below is a breakdown of the most common loft conversion types and whether they fall under permitted development rights or not:
- Dormer Loft Conversion: Most loft conversions of this type are considered permitted development if they do not extend beyond the existing roof slope or exceed the highest point of the roof. However, if the dormer extends towards the principal elevation, it may require planning permission.
- Hip to Gable Loft Extension: This type of loft extension is usually allowed under permitted development, provided it remains within the permitted volume allowance and does not exceed the existing rafters.
- Mansard Loft Conversion: Since mansard conversions significantly alter the existing roof plane and roof structure, they almost always require planning permission.
- Velux or Roof Light Conversion: Installing roof windows or skylights generally falls under permitted development as long as they do not protrude more than 150mm from the existing roof plane.
Regardless of the type, homeowners must also comply with building regulations to ensure safety and structural stability. This includes provisions for sound insulation, fire escape routes, and building regulation approval.
How Much Does Planning Permission Cost?
For homeowners who need planning permission, the costs can vary depending on the location and scope of the project. In England, the typical planning permission cost for a loft conversion is between £202 and £266. In Wales, fees for loft extension applications are around £300. Some exemptions apply for listed buildings or properties in conservation areas.
Additional costs may include:
- Party wall agreement fees if the loft conversion affects a neighbour’s property.
- Fees for structural reports and professional consultations.
- Costs associated with building regulation applications.
How to Apply for Planning Permission
Applying for planning permission is a straightforward process and can typically be done online. Homeowners should submit their applications through their local planning authority’s portal. The application process involves:
- Preparing detailed architectural plans of the proposed loft conversion.
- Submitting a party wall notice if the project affects an adjoining property.
- Ensuring compliance with building regulations and development rights.
- Paying the necessary fees for processing the application.
The local planning authority typically takes no more than eight weeks to process standard applications, though complex projects may require up to 13 weeks. Once granted, planning permission is valid for three years, allowing homeowners sufficient time to complete their loft conversion.
By understanding these key conditions, types of conversions, costs, and the application process, homeowners can confidently navigate the planning process and ensure compliance with all relevant regulations.
