We specialize in securing planning permission for heritage windows and doors. From detailed drawings to full application management, we handle the entire process quickly, clearly, and without the stress.

About Us

Hi, I’m Karl McGlashon, founder of Heritage Window Planning Services. I’ve worked in the window industry for over 20 years, and during that time I’ve seen just how difficult it can be for homeowners, installers, and even builders to get planning permission when it comes to listed buildings or conservation areas.
I set up this service to take the stress out of the process. Planning applications can be confusing, especially when you're just trying to replace old, draughty windows with something that looks right and performs better. That’s where I come in.
Unlike general planning consultants, I focus solely on window replacement in heritage and conservation settings. It’s a niche, but one I know inside out. I understand what conservation officers are looking for and how to present applications in a way that gives you the best chance of approval.
I handle everything needed for the application, including:

  • Heritage Statements
  • Design & Access Statements
  • Scaled Elevation Drawings
  • Direct liaison with the local council

I take a hands-on approach and stay involved throughout the process, keeping things clear and straightforward. What I enjoy most is helping to keep the beauty and character of historic homes alive, while also making sure they benefit from modern window advancements.
My business is built on honesty, reliability, and attention to detail. If you're not sure where to start, I’ll guide you through it. And if you’ve already had an application refused, I can help you find a better way forward.

FREQUENTLY ASKED QUESTIONS

Got Any Questions?

Most planning consultants deal with all kinds of applications, like new builds, extensions, or commercial developments. We don’t. We specialise only in helping people get planning permission to replace or upgrade windows and doors in heritage properties. That includes listed buildings, conservation areas, and homes affected by local planning rules. Because it’s such a specific field, we’ve come to know it inside out. We understand what councils are looking for, how to word the application documents, and how to avoid common mistakes that lead to delays or refusals. That level of focus makes a big difference when it comes to getting your application approved the first time around.

You’ll be dealing directly with me, Karl McGlashon. I’ve been involved in the window industry for more than 20 years. During that time, I’ve seen just how tricky planning permission can get, especially for older or protected properties. I set up Heritage Window Planning Services because I saw how many people were struggling with the process. I personally handle each case myself. That means you won’t be passed between departments or asked to explain things over and over. From your first enquiry to the final decision, I’ll be your main point of contact and will keep things clear and straightforward.

No, we help with all types of heritage and conservation work. That includes listed buildings of any grade, homes in designated conservation areas, and even properties affected by things like Article 4 Directions, which remove permitted development rights. Even if your property isn’t officially listed, you may still need permission if you’re changing the style, materials, or appearance of your windows. The rules can vary a lot depending on the council. That is why we offer a free review to confirm whether you need permission and what your options are.

We handle the full planning process from start to finish. That includes preparing all the necessary documents such as scaled elevation drawings, a Heritage Statement, and a Design and Access Statement where required. We fill out and submit the planning application on your behalf, communicate with the local planning authority, and monitor progress throughout the process. If the council comes back with questions or needs minor changes, we’ll take care of that too. The aim is to make the entire process as easy as possible for you, without cutting corners or leaving you in the dark.

Yes, we’re happy to work directly with your window supplier, installer, or architect. In fact, it often helps keep things moving smoothly. Many planning issues come from a breakdown in communication between homeowners, builders, and planning departments. By working with your installer directly, we can make sure the technical details are right and that the plans align with what the council is likely to accept. It also helps avoid delays or rejections that come from missing information or unclear designs.

We work with clients across the entire UK. Whether you live in a busy city, a quiet village, or somewhere remote, we can take care of your application without needing to visit in person. The process starts by sending us your address, a few clear photos of your windows or property, and a brief description of what you’re hoping to do. We’ll review everything and get back to you with advice tailored to your situation. If you decide to go ahead, we’ll confirm the fixed cost up front and guide you through the next steps.