Professional, builder-ready drawing packages for extensions, lofts, porches, garages, garden rooms and more — designed to Permitted Development parameters and supplied as sold.
PERMITTED HOMEOWNER GUIDES
Our illustrated, practical guides help you understand the rules, explore design options and budget with confidence — before you commit to building work.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Rules, design options, costs and next steps.
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Certain roof alterations can be made under Permitted Development (PD), including hip-to-gable conversions and additional roof lights. It’s a great way to create extra space and light without a full planning application.
See what you could build at your home and choose the right drawing package.
Many types of roof alteration fall under the Permitted Development Order. The main limits relate to the size and height of the extension, the type of property and its location, with additional rules for terraced houses, conservation areas and listed buildings.
Your roof alteration must comply with all of the relevant PD rules. If any single limit is exceeded, a normal planning application may be required.
A range of roof alterations can often be made under PD, including:
Hip-to-gable conversionChanging a hipped roof to a gable end, often with a rear dormer.
Dormer windowsAdding a dormer to the rear roof slope (subject to size limits).
Roof lightsInstalling roof lights (such as Velux windows) on a non-principal elevation.A roof enlargement is limited by the volume added to the original roof space: 40 cubic metres for a terrace house, or 50 cubic metres in any other case. No part of the house, once enlarged, may exceed the height of the highest part of the existing roof.
Most roof alterations must be to the rear of the property and must not be forward of the principal elevation (including any side elevation facing a highway).
Materials should be of a similar appearance to the existing roof, including tiles or slates, to keep a consistent look.
A rear dormer adding extra living space — built within PD limits.
A complete, builder-ready set of drawings supplied exactly as sold.
We will check your property, apply the relevant Permitted Development rules and help you configure the right design and drawing package for your home.
Permitted Development rights described on this page apply to houses in England under the Town and Country Planning (General Permitted Development) (England) Order 2015. Different planning rules apply in Scotland, Wales and Northern Ireland. This page is general guidance, not a formal planning determination — always check your own property and, where you need certainty, apply to your local planning authority for a Lawful Development Certificate.
Each one is already drawn. You choose the material, roof and options we actually draw, and that is the package you receive.
A practical entrance area that adds space and improves the look of your home.
£350
A popular way to create a larger kitchen, dining or family area.
£900
Adds valuable space to the side of your home for a kitchen or utility.
£900Turns unused loft space into a bedroom, office or additional living area.
£1,500
A flexible, detached space for work, leisure or extra living space.
£350
Secure parking or useful storage, single or double.
£350
Significantly more living space across both floors.
£1,400
A bright, glazed room connecting your home to the garden.
£900We use cookies that are needed to run the basket and checkout. We would also like to use analytics cookies to understand how the site is used. We only do that if you say yes.
Maximize your property’s footprint with precision and ease. Permitted provides complete design for Permitted Development Rights. Our packages are designed around the Permitted Development limits, so many projects can proceed without a full planning application.
PERMITTED is operated by Yorkshire Property Design Services Limited, registered in England and Wales under company number 12698267.
Registered office: Ground Floor, Techno Centre, Station Road, Horsforth, Leeds, LS18 5BJ
Business contact address: Wira House, Ground Floor, Suite 5, Ring Road, West Park, Leeds, LS16 6EB
