There’s so much to consider when installing new windows and doors, including their design, what colour frames you’ll choose and the type of glazing that’s right for your property. However, many forget to consider any planning permission implications. That’s why we’ve put together this easy guide to the rules and regulations you need to be aware of.

What do you need to consider when installing new windows & doors? Expert guide covers side windows, bay windows, roof lanterns, skylights & conservation areas. Get expert advice from the Surrey & London specialist now.Do New Windows & Doors Need Planning Permission?

Most types of windows and doors don’t need planning permission as long as they’re similar in appearance to the windows which were used when your house was constructed. However, one of the main areas where guidelines must be strictly followed is on upper floor side elevations. These must be either 1.7 metres above the floor or non-opening and must have obscure glazing. Internal secondary glazing doesn’t need permission either. While minor improvements and repainting don’t fall under planning permission remit, if you’re a leaseholder, refer to your landlord, lease terms or management company for guidelines.

Bay Windows

A new bay window won’t be treated as a new window but as an extension. These may still fall into permitted developments, not requiring full planning permission application. However, you must comply with a specific set of rules in place which can be found on the government planning portal page for any extensions to your property. Advice includes how far the bay window can extend beyond the property wall, how much land can be built on and the maximum height of an extension.  We have recently installed a number of windows in Forest Hill where planning permission was thought to be required but was eventually not needed.

Skylights & Roof Lanterns

New skylights and roof lanterns won’t need planning permission if the designs fall within ‘permitted developments’. This means they don’t protrude further than 150mm from the roof’s slope, they’re installed below the roof’s highest point, and any side elevation skylights follow the same rules as windows installed on upper side elevations.

Conservation Areas

For those looking to install new windows in designated areas such as national parks or conservation areas, you may need listed building consent for any work you do. Always check with your local authority about which guidelines apply to your property, and you can ask a specialist window and door supplier for help with this too. For example, popular Residence 9 windows have been designed with Article 4 Conservation Area Guidelines in mind, preserving the heritage details which define period home windows.

Building Regulations

Building regulations apply to certain parts of new windows and doors, including any replacement glazing, as well their safety, thermal efficiency, ventilation and access. If using a reputable installer, they’ll have vast experience with compliant materials and the standards in place for any products they install.

Looking for new windows and doors?

Here at Merton Windows, we provide an extensive collection of replacement windows and doors for your home or business. Our knowledgeable team will help you find the right designs for your property, as well as advice about planning and building regulation guidelines. We work across Surrey and London areas, including Chessington, Epsom and Richmond. Arrange your free consultation and quotation by getting in touch now.