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The Top Home Renovations That Cost the Most: A Comprehensive Guide

Updated: Jul 21, 2023

Embarking on a home renovation project can be an exciting yet daunting task. As you plan your renovation, it's crucial to have a clear understanding of the potential costs involved. In this blog post, we will explore the most expensive home renovations, including extensions, loft conversions, new kitchens, new bathrooms, wall removals, and their associated costs.

We'll also touch upon additional expenses related to structural engineers, architects, building control, planning permissions, and the impact on listed buildings.

Home renovation of double story extension
Home renovation


Building an extension is a popular way to add space and value to your home. The cost of an extension depends on its size, complexity, and location. On average, a single-story extension can cost between £40.000 to £60.000, while a double-story extension may range from £70.000 to £100.000. Additional costs include planning permission fees, structural engineer fees (around £350 to £1,200), architect fees (around 10-15% of the project cost), and building control fees.

Loft Conversions:

Converting an underutilized attic space into a functional living area can significantly enhance your home's value. The cost of a loft conversion varies based on factors such as the size of the loft, structural requirements, and the type of conversion. On average, a loft conversion can cost between £50.000 to £70.000. It's important to consider building control fees, architectural fees (around 10-15% of the project cost), and potential planning permission costs.

Building Regulsation cover everything from fire safety, glazing, ventilation, structural work and much more. If building regulations aren't followed, you may have to re-do the work and even pay a fine.

New Kitchens:

Updating your kitchen is a common home improvement project that often comes with a substantial price tag. The cost of a new kitchen depends on factors such as the size, quality of materials, appliances, and finishes. On average, a mid-range kitchen renovation can cost between £9,000 and £30,000, while high-end renovations can surpass £50,000. It's advisable to consider hiring an architect or kitchen designer to optimize the space and ensure a functional layout.

New Bathrooms:

Renovating a bathroom can add comfort and style to your home. The cost of a bathroom renovation varies depending on the size, complexity of the design, and the quality of fixtures and finishes. On average, a bathroom renovation can range from £5,000 to £15,000. It's essential to account for plumbing and electrical work, as well as labor costs when estimating the total expenses.

Wall Removal:

Removing walls to create an open floor plan can transform the look and feel of your home. The cost of wall removal depends on various factors, such as the wall's load-bearing capacity, complexity, and the need for structural support. A small load bearing wall will cost in the region of £2400 and less for a non load bearing wall. Hiring a structural engineer to assess the structural integrity and provide necessary calculations can cost around £350 to £1000. Additionally, it's important to consult with a professional to determine if any planning permission is required.

Listed Buildings:

Renovating a listed building can be more expensive and complex due to strict regulations and preservation requirements. The costs associated with listed buildings can vary significantly, depending on the level of preservation needed, specialized materials, and the expertise required for restoration. It's crucial to consult with an architect or conservation officer to ensure compliance with heritage regulations and to obtain accurate cost estimates.

Costs for listed building renovations can be significantly higher than regular renovations due to the specialized nature of the work and materials involved.

Living Elsewhere During Renovations:

While living elsewhere during the renovation process can alleviate disruptions, it's not always feasible for everyone. The cost of temporary accommodation should be factored into your budget if you choose to live elsewhere. Depending on the location and duration, renting a temporary residence or staying in a hotel can significantly impact your overall renovation costs.


Home renovations can breathe new life into your living space but come with their own set of expenses. Understanding the costs associated with extensions, loft conversions, new kitchens, new bathrooms, and wall removals is essential for effective budgeting.

Additional expenses such as structural engineers (for assessments and calculations), architects (for design and planning), building control (for compliance inspections), and planning permission costs should also be considered. For listed buildings, it's important to recognize the potentially higher costs involved due to specialized materials and restoration requirements. Finally, deciding whether to live elsewhere during renovations requires careful consideration of your circumstances and the associated costs.

By being well-informed, you can better navigate the financial aspects of your home renovation project. A reputable Builder can help you get all permisions and adhere to all regulations if you need help.


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