What Is a Party Wall? Key Building Terms You Should Know

24 February 2026

Owning or improving a property often comes with unfamiliar language that can feel confusing or overwhelming. From planning building works to dealing with defects or neighbourly issues, understanding key construction and property terms can help homeowners make informed decisions. At Simon Levy Associates, we regularly support clients across Borehamwood, Watford and Greater London by explaining technical matters clearly and providing professional guidance at every stage.

What Is a Party Wall?

One of the most common terms homeowners encounter is a party wall. This usually refers to a wall shared by two properties, such as between terraced or semi-detached houses, although it can also include floors and ceilings in flats or boundary walls. Understanding what a party wall is is important because certain building works trigger legal procedures that must be followed to protect both you and your neighbour.

What Does a Building Survey Involve?

A building survey is a detailed inspection of a property’s condition carried out by qualified building surveyors. It assesses the structure, fabric and visible elements of a building, identifying defects, maintenance issues and potential risks. Homeowners often commission surveys when buying older properties or planning significant works, as they provide clarity on condition and future repair costs.

What Are Building Defects?

Building defects refer to faults or failures in construction that affect a property’s performance, safety or appearance. These may include cracking, damp, timber decay or poor workmanship. Early identification is key, as unresolved defects can worsen over time and become more costly to repair. Independent advice from experienced surveyors helps homeowners understand the cause of defects and the most appropriate remedial options.

What Are Dilapidations?

Dilapidations are issues relating to disrepair or failure to maintain a property, most commonly arising in landlord and tenant situations. While often associated with commercial premises, homeowners who rent out property may also encounter this term. Professional assessment ensures that responsibilities are clearly defined and disputes are minimised.

Why Professional Advice Matters

Property-related decisions often involve technical, legal and financial considerations. Engaging chartered professionals ensures that advice is impartial, accurate and aligned with industry standards. Simon Levy Associates is regulated by the Royal Institution of Chartered Surveyors, giving homeowners confidence that all advice is delivered with integrity, professionalism and technical expertise.

How Simon Levy Associates Supports Homeowners

With over 30 years of experience, Simon Levy Associates provides clear, practical advice tailored to homeowners’ needs. From party wall matters and building surveys to defect diagnosis and dispute support, our team works across Borehamwood, Watford, Greater London and the South East. We pride ourselves on clear communication and a proactive approach that helps clients move forward with confidence.

Speak to Our Chartered Building Surveyors

If you are unsure about building terminology or need professional guidance on your property, our team is here to help. Contact us at Simon Levy Associates today to speak with trusted building surveyors who can explain your options clearly and provide expert support every step of the way.

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