How Much Should You Insure Your Home Renovation For?

Planning a home renovation involves multiple decisions, from design through to construction. However, before the first brick is laid, there is one critical question you must answer: how much is this project actually worth in the eyes of an insurer?

Getting the figures wrong at this stage is one of the most common mistakes homeowners make. Many rely on their existing buildings insurance, only to find that major works have invalidated their cover. Understanding the correct level of cover involves more than relying on your contractor’s quote. It requires a clear understanding of how your project is valued for insurance so your investment is properly protected.

Understanding Reinstatement vs Market Value

One of the biggest points of confusion for property owners is the difference between what a house is worth on the market and what it costs to rebuild.

For insurance purposes, we are interested in the total reinstatement cost. This is the amount it would take to rebuild your home from scratch if it were totally destroyed, including professional fees and site clearance. When you begin a project, the renovation house insurance cost is influenced by how the new works increase this total value.

To determine the correct sum insured, you must consider three distinct elements:

1. The Existing Structure Value: The rebuild cost of the house as it stands today.
   
   
2. The Contract Works Value: The total cost of the renovation project itself, including labour and materials.
   
   
3. Professional Fees and VAT: Architects, surveyors and legal fees often account for a significant percentage of the total project cost.

The Danger Of Underinsurance

It can be tempting to provide a lower estimate to try to reduce your house renovation insurance cost, but this is a risky approach.

Insurers use what is known as the Average Clause. If you insure your project for £100,000 but the true value is found to be £200,000 at the time of a claim, you are underinsured by 50%. In this scenario, the insurer may only pay out 50% of any claim, even for a minor incident. This can leave you responsible for a significant proportion of the repair costs.

Selecting the right insurance for house renovation means being realistic about the figures from day one.

What Needs To Be Included In Your Sum Insured?

A comprehensive policy needs to cover every moving part of the construction site. It’s not just about the finished walls, but also about everything that makes the project happen.

1. Materials On Site: Timber, tiles and fixtures are at risk of theft or damage and are often not fully covered by a builder's standard liability policy once they are delivered to your property.
   
   
2. Works In Progress: If a storm damages a partially completed extension, your policy needs to cover the cost of redoing that specific work.
   
   
3. Structural Alterations: Knocking through external walls or adding basements changes the risk profile of the existing building significantly.
   
   
4. Liability to Neighbours: Renovation work can cause cracks next door or even subsidence. You need robust third-party liability to protect against legal claims from those living around you.

Handling Mid-Build Cost Increases

Project creep is a reality of the construction industry. Whether you decide on a higher-spec finish or the price of raw materials suddenly spikes, the initial sum you insured for can quickly become outdated.

Unlike standard home policies, which are often rigid, specialist insurance for house renovation is designed to be flexible. However, it’s your responsibility to inform your broker if the contract value increases by a significant margin. Failing to update your policy mid-build can trigger the same underinsurance penalties mentioned earlier.

Why Specialist Renovation Insurance Is Different?

Standard home insurance typically contains restrictive clauses regarding unoccupancy (often as short as 30 days) and alterations and renovations exclusions that kick in the moment you start structural work.

Specialist renovation house insurance is designed specifically for the duration of your project. These policies provide:

1. Clear Project-Based Protection: Cover that lasts for the duration of the build, whether that is six months or two years.
   
   
2. No Restrictive Duration Limits: Flexibility if the project runs over schedule.
   
   
3. Unoccupancy Permissions: Allowing you to move out while the heavy work is done without losing your cover.

Protect Your Investment With Certainty

At Crowthorne Insurance, we look beyond the basic premium to ensure the policy wording matches the reality of your site. Our goal is to provide high-level customer service with no uncertainty, so you can focus on the build while we handle the risk.

Are you unsure if your current figures provide enough protection for your project? Request a callback from our expert team today to ensure you have the right insurance for house renovation.

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