Garden Room Size Permitted

Garden Room Size Permitted

At Pecasa, based in Colonial Way, we specialise in helping homeowners transform their outdoor spaces into practical, stylish, and high-quality garden rooms. Whether you’re thinking of a garden office, a garden studio, or simply expanding your living space, it’s important to understand what’s allowed when it comes to building in your garden.

What Is a Garden Room?

A garden room is a stand-alone structure built within your garden space. Unlike sheds or summer houses, these rooms are designed for year-round use and can serve various purposes – from a home office or studio to a guest room or personal retreat. Built with insulation, electricity, and modern materials, they blend convenience and comfort with contemporary design.

Do You Need Planning Permission?

One of the most common questions we’re asked is about size restrictions and whether planning permission is required. The good news is that most garden rooms fall under permitted development rules, meaning no planning permission is needed – as long as specific conditions are met.

Here’s a general guideline for permitted development:

  • The building must be single-storey, with a maximum height of 2.5 metres if within 2 metres of a boundary.

  • If located further than 2 metres from the boundary, the maximum height can be up to 3 metres (flat roof) or 4 metres (dual-pitched roof).

  • The garden room should not cover more than 50% of the original garden space.

  • It must not be used as a separate dwelling.

At Pecasa, we’ll guide you through every regulation to ensure full compliance with local planning laws. If your design falls outside the permitted limits, we can help with planning applications too.

Building a Garden Office in London

With remote work now a standard part of life, the demand for garden offices in London has soared. More and more people want a quiet, dedicated space to work without sacrificing room inside their homes. A garden office offers privacy, productivity, and a clear separation between work and home life.

Our designs at Pecasa focus on function, comfort, and style – fully wired, insulated, and equipped to support a professional working environment.

How Much Does It Cost?

London Outhouse Cost

An outhouse in London can vary greatly in cost depending on its size, materials, and usage. Typically, a simple structure may start from £8,000–£12,000, while more elaborate designs with plumbing, heating, or kitchenettes can range up to £25,000 or more.

Garden Studio Cost

A garden studio intended for hobbies like music, art, or fitness may require better soundproofing, lighting, and ventilation. Prices generally start around £10,000 and can go upwards depending on design customisation and features.

Garden Room Cost

For a fully functional garden room suitable as an office, guest room, or gym, costs typically range between £12,000 and £30,000. The key factors that influence the price include size, insulation, roofing, doors, windows, and additional utilities such as plumbing or electric heating.

At Pecasa, we offer tailored quotes to suit your needs and budget, ensuring transparency and no hidden surprises.

What Size Garden Room Can You Build?

When deciding on the size of your garden room, there are a few things to keep in mind:

  • Most standard designs range from 3m x 3m (ideal for a small office) up to 5m x 4m or larger.

  • For those under permitted development, keeping under 2.5m height is crucial, especially near boundaries.

  • The total area must not take up more than 50% of your garden – including any other outbuildings.

  • If you live in a listed property or a designated area, additional restrictions may apply.

Our team at Pecasa will visit your site, assess your garden’s layout, and advise on the maximum size permitted without needing planning permission.

Why Choose Pecasa?

Located in Colonial Way, Pecasa has years of experience designing and building bespoke garden rooms for London homeowners. From start to finish, we manage the process – design, planning, groundwork, construction, and finishing touches. Whether you’re adding a home office, creative studio, or a tranquil retreat, we’ll help you bring your vision to life, with clear advice on garden room size permitted and a design that suits your space.

Ready to expand your home into your garden? Contact Pecasa today for a free consultation and let’s explore how we can create the perfect outdoor space for you.