At Mercia, every insulated garden room is thoughtfully engineered to blend style, practicality, and sustainability, giving you a modern living area right in the heart of your garden.

The Sherwood Range - Premium Insulated Garden Rooms

Our Sherwood Range represents the pinnacle of garden building design. Built for lasting comfort, these premium insulated garden rooms feature:

• 100mm double-skinned walls with EcoQuilt insulation
  
• A fully insulated tongue and groove roof
  
• A 16mm insulated floor using advanced Air Tech technology
  

This combination ensures exceptional warmth, soundproofing, and durability. Each Sherwood Garden Room can be customised with additional doors and windows, allowing you to tailor your space perfectly to your needs, whether that’s for work, fitness, or relaxation.

Elegant, secure, and built to last, the Sherwood Range sets the standard for quality outdoor living.

DIY or Professionally Installed Garden Rooms

Mercia offers two convenient ways to create your ideal garden room:

DIY Insulated Garden Rooms:

Our affordable DIY IGR range gives you full control over installation while maintaining premium build quality. Featuring 72mm insulated double-skinned walls, Air Tech floors, and double-glazed windows, these units are robust, efficient, and easy to assemble, helping you save on installation costs.

Installed Garden Rooms:

Prefer a stress-free setup? Choose our installed Range, where our expert team handles everything for you. Simply prepare a level base using paving slabs or concrete, and we’ll take care of the rest, delivering a flawless, professional finish.

Will an Insulated Garden Room Increase My Home’s Value?

Yes — an insulated garden room can add measurable value to your property. These buildings are highly desirable to buyers because they offer flexible living and working space without requiring planning permission or major renovations.

A well-designed garden room doesn’t just add square footage — it makes your home more appealing, functional, and future-ready.

Do I Need Planning Permission for an Insulated Garden Room?

In most cases, no planning permission is required. Our insulated garden rooms fall under permitted development, meaning you can typically install one without formal approval.

However, always check your local regulations and property boundaries to be sure. Our team is happy to help guide you through the process, so you can focus on enjoying your new space.

Create Your Perfect Garden Room

From compact home offices to spacious garden studios, Mercia’s Insulated Garden Rooms deliver all the comfort and quality of an extra room, without the high cost of an extension.

Explore the full range today and discover how you can transform your garden into a functional, stylish living space that’s built to last.