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How Much Does a Mudroom Addition Cost? A Real Homeowner’s Experience

When Sarah and James moved into their charming 1950s semi-detached home in London, they loved almost everything about it—except for the cluttered front entryway. With two young kids, a dog, and London’s ever-changing weather, their hallway quickly turned into a mess of shoes, coats, and muddy footprints.

That’s when they started looking into adding a mudroom.

What Is a Mudroom, and Why Add One?

A mudroom is a small transitional space between the outdoors and the main part of the house—usually located near the back or side entrance. It’s designed to keep the home clean and organized by offering storage for coats, boots, bags, and even laundry appliances.

For families like Sarah and James’s, it’s not just a luxury—it’s a lifestyle upgrade.

Mudroom Addition Costs: A Breakdown

Sarah reached out to several local contractors and found that mudroom addition costs in the UK vary depending on several factors:

  1. Size and Scope
  • A small, 6x6ft mudroom conversion within an existing space: £3,000–£5,000
  • A medium-sized, custom-built mudroom addition: £8,000–£15,000
  • A large mudroom with high-end finishes and built-in cabinetry: £15,000–£30,000+
  1. Construction Type
  • Converting an existing space (garage, porch, or utility area): More budget-friendly.
  • Building a new extension: Higher cost due to foundations, roofing, and structural changes.
  1. Features & Finishes
  • Built-in storage: +£1,500–£5,000
  • Underfloor heating: +£500–£2,000
  • Durable tile or waterproof flooring: +£20–£60 per m²
  • Washer/dryer installation: +£1,000–£2,500

Planning Permission & Regulations

Sarah also learned that if you’re building a brand-new extension for your mudroom, you might need planning permission—especially if the project affects external walls or expands the building footprint.

Luckily, her project qualified under permitted development rights, but it’s always best to check with your local authority or hire a contractor who handles that part of the process.

Final Cost: Was It Worth It?

In the end, Sarah and James spent £12,500 on a medium-sized mudroom addition with custom storage, waterproof flooring, and a bench area. It took about 3 weeks to complete—and completely transformed their day-to-day routine.

“The best part,” Sarah says, “is walking into a tidy home, even after a rainy school run or a muddy dog walk. It’s the upgrade we didn’t know we needed.”

Thinking About a Mudroom Addition?

If you’re asking how much does a mudroom addition cost, the real answer is: it depends. But one thing is certain—investing in a well-designed mudroom can increase your home’s functionality, cleanliness, and even resale value.

Need help planning your own mudroom? Get a free consultation with our renovation experts today and let’s design a space that works for your lifestyle