Permitted Development Rights in Havering: What You Can Build Without Planning Permission

If you own a home in the London Borough of Havering, which covers Hornchurch, Romford, Upminster, Rainham, Harold Wood, and the surrounding areas, you may be able to extend or alter your property without needing to apply for planning permission. These rights are known as Permitted Development (PD) rights, and understanding them can save you months of waiting and hundreds of pounds in application fees.

However, PD rights come with strict conditions. Get them wrong and you could face enforcement action from the council or be forced to demolish the work. This guide explains exactly what you can and cannot do under permitted development in Havering in 2026.

What Is Permitted Development?

Permitted Development is a set of national planning rules that grant automatic permission for certain types of building work on houses. The rules are set out in the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended), and they apply across England, including Havering. They exist to allow homeowners to make reasonable improvements to their homes without having to go through the full planning application process.

It is important to understand that PD rights apply to houses, not flats or maisonettes. If you live in a flat, you will almost always need planning permission for external alterations. PD rights can also be removed or restricted if your property is in a Conservation Area, is a Listed Building, or if the council has placed an Article 4 Direction on your area.

Single Storey Rear Extensions in Havering

Under permitted development, you can build a single storey rear extension up to 4 metres deep on a detached house, or 3 metres on a semi-detached or terraced house, without any application at all, provided you meet all the conditions regarding height, materials, and boundary distances.

There is also the Larger Home Extension scheme, which allows extensions of up to 8 metres on detached houses and 6 metres on semi-detached or terraced houses. This requires a Prior Approval application to Havering Council, which is a simpler and cheaper process than full planning. The council will notify your immediate neighbours and consider any objections relating to the impact on their amenity. The application fee is currently lower than a full householder application, and the decision is typically made within 42 days.

Loft Conversions Under Permitted Development

Loft conversions are one of the most popular home improvements in Havering, and many can be carried out under permitted development. The key limits are: the volume of the roof space must not increase by more than 50 cubic metres for a detached house, or 40 cubic metres for a semi-detached or terraced house. The extension cannot be higher than the existing ridge line. Materials used on the exterior should be similar in appearance to the existing house. Side-facing windows must be obscure-glazed and non-opening below 1.7 metres.

Rear dormers are the most common type of loft conversion in Havering. They are generally permitted under PD provided they do not exceed the volume limits and are set back from the eaves. Hip-to-gable conversions are also popular, particularly on semi-detached homes, and can be combined with a rear dormer to maximise the usable space.

Outbuildings, Side Extensions, and Other PD Works

Outbuildings such as garden rooms, home offices, and gyms can be built under permitted development provided they are single storey, do not cover more than 50 percent of the garden area, and are not forward of the principal elevation. Maximum eaves height is 2.5 metres, and the overall height must not exceed 4 metres for a dual-pitched roof or 3 metres for any other roof type.

Side extensions of up to half the width of the original house can also be built under PD, provided they are single storey and do not exceed 4 metres in height. Two-storey side extensions always require full planning permission.

Rear Elevation Showing Extension.

Do You Need a Lawful Development Certificate?

Even if your project falls within permitted development, I strongly recommend applying for a Lawful Development Certificate (LDC) from Havering Council. An LDC is a formal legal document that confirms your proposed work is lawful under PD rights. It provides certainty for you, your builder, and any future buyer of your property. Without an LDC, a solicitor acting for a future buyer may raise queries about whether the extension had the necessary permissions, which can delay or even derail a sale.

At SO Architectural Design, our Permitted Development Express package includes everything you need for an LDC application: a measured site survey, feasibility assessment, and a full set of drawings ready for submission. Single storey extensions and loft conversions start from £2,500.

When You Will Need Full Planning Permission in Havering

Not everything can be done under PD. You will need full planning permission in Havering if: your home is in a Conservation Area (parts of Upminster, Havering-atte-Bower, and Rainham Village are designated), your extension exceeds the PD size limits, you want to build a two-storey side or rear extension, the property is a flat or maisonette, or PD rights have been removed by a condition on a previous planning permission.

If you are unsure whether your project falls within permitted development or requires full planning, a pre-application enquiry with Havering Council or a consultation with an experienced architectural designer is the safest first step. Getting this wrong at the start can cost you thousands in abortive work.

Next Steps

If you are planning to extend or convert your home in Havering, we can help you understand your PD rights, prepare the drawings, and handle the application. Book a free 15-minute discovery call to discuss your project, or download our free Essex Extension Roadmap guide for a step-by-step overview of the entire process from design to build.