I’m a property expert – the five mistakes homeowners make when building extensions

SPENDING more time at home has made families desperate for space. 

But with property prices racing away and family houses in short supply, demand for home extensions is high.  

In the 12 months to September 2021, some 250,000 planning permissions were granted for extensions, estate agent Savills found. And this year the trend looks set to continue. 

Building an extension, annex and conservatory are among the top five home improvement projects for this year, according to tradesperson directory RatedPeople.com. 

But before you steam ahead with grand extension plans, make sure you know the rules or you’ll upset the neighbours and wind up out of pocket. 

Tom Edwards, partner in property disputes at LCF Law, said: “Homeowners must be cautious about getting into boundary and party wall disputes. It can affect the sale of their property and its value.  

“Some homeowners think they are entitled to build on their land without considering neighbouring properties simply because it’s their land, or they think it is. 

“But they don’t appreciate the traps they can fall into which can irretrievably break down relations between neighbours and could end up costing them thousands of pounds.” 

Over the last two years, LCF has seen a 150% increase in boundary disputes between neighbours getting irate over home and garden improvements. 

Tom explains the most common reasons neighbours fall out over extensions and how it can be avoided. 

Know your boundaries   

Overstepping or misinterpreting property boundaries is a common cause of disputes, said Tom.    

Title plans can be misleading. A red line on the plan indicates where your general boundary lies, not its precise location.   

Tearing up fences to make way for your extension because you believe you own the land could cause a legal dispute.   

To avoid this, you can who will send a surveyor to your property to have your boundary determined.

The Land Registry charges an application fee of £90. You’ll also have to pay surveying and legal fees.   

“Alternatively, you can sign an agreement with your neighbour describing where the boundary is,” said Tom.

“Or you can play detective and review the original title deeds for your property, which in some cases could be 200 years old. 

“This can be very complicated so it’s best to seek advice from a specialist surveyor or solicitor to save you expense and stress in the future.”     

Party Wall Act notice   

The Party Wall Act 1996 is a piece of legislation designed to prevent and resolve disputes between neighbours over building or digging work that affects a party wall. 

A party wall is a wall shared between you and your neighbours common in semi-detached homes and terraces. However, your extension could fall under Party Wall rules.   

Tom said: “If you want to start building work within six metres of an adjoining owner’s home you need to be conscious that by digging foundations you may fall within the Party Wall Act, which means you must serve written notice to your neighbour of your plans.”  

A Party Wall notice must include the names of the owners planning the work, details of the construction, when it will start and be signed and dated.