Why You Need to Know About Party Walls if You're Considering an Extension?

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By Alexandra Miller

Updated: Jun 21, 2024

8 min read

Party Walls
AI Generated Image: Heaven Gables

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    A shared wall between two units, whether rented or owned, is commonly referred to as a party wall. These walls are typically found in buildings like apartments, condos, hotels, and offices, where different occupants share a common structure. While party walls may not always be load-bearing, regulations in various regions specify their construction requirements. You can always get advice from Party Wall Surveyors for more legal information.

    Regulations and Agreements in Multi-Unit Properties

    • Party walls separate tenants in multi-unit residential or commercial properties.
    • Local or state laws often dictate the construction specifications of party walls.
    • Properties usually have a party wall agreement recognized by all relevant parties.
    • Specifications may include privacy measures like soundproofing and safety features such as fire-resistant insulation.

    The Role of Party Walls in Multi-Unit Buildings

    Party walls aim to uphold the privacy and peace of occupants in multi-unit structures. They may include extra insulation to minimise noise transmission between units. Some building codes mandate party walls to function as firewalls, using non-flammable materials to hinder fire spread and reduce property damage.Traditionally, each owner is deemed to own half of the party wall and is granted an easement for structural support.

    Establishing Ownership and Maintenance Rules for Shared Walls

    The agreements establish ownership and maintenance rules for shared walls to prevent disputes. They cover walls attached to properties, dividing walls within a structure, and those on land owned by multiple parties. Business owners find such agreements invaluable in avoiding costly legal battles over disputes. Agreements typically outline maintenance responsibilities and may regulate alterations to the wall, requiring mutual consent for structural changes.

    Recording the agreement in land records allows prospective buyers to understand property conditions.

    Extending a Party Wall Without Causing Damage or Infringing on Neighbor Rights

    Owners can increase the height of a party wall, as long as the existing structure is not damaged, and the addition remains usable for both parties. The owner who extends the wall must ensure no harm is done and is liable for any damages. When extending a wall in height or length, the extending owner assumes responsibility for any resultant damages to the adjoining property.

    Restrictions on Weakening Party Walls

    Temporary wooden party wall separating a room
    AI Generated Image: Heaven Gables

    No owner can perform actions on their property that would weaken a party wall, thus depriving the other of its use. There is no obligation to strengthen the wall beyond its original condition, and a party wall does not need to be a solid structure.

    Regulations on Installing Windows to Party Walls

    Installing windows in a party wall without an agreement permitting such openings violates the wall's maintenance agreement. Adding windows is generally acceptable if it does not compromise the wall's integrity or create privacy issues. One owner can brick up windows on their side but cannot force the neighbour to do the same, which does not recognize easements for light and air. Neither windows nor water pipes that may become a nuisance are permitted in a party.

    The Evolution and Temporary Nature of Party Wall Rights and Laws

    The rights associated with a party wall are not permanent and can be nullified when the wall's purpose ends. If a party wall is destroyed, for example by fire, the associated rights are suspended until the buildings are reconstructed, at which point the rights can be revived. If only one building is destroyed, the other owner retains the right to use the party wall for support.

    Party wall laws have evolved through judicial decisions since the 18th century, addressing conflicts over shared property fairly. As long as property ownership and party walls exist, disputes will arise, but this area of law has been well-defined to manage such conflicts effectively.

    Understanding Party Walls : Division, Definition & Consideration

    Division

    Depending on location, this shared wall may be evenly divided between both properties.

    Origin of the Term Party Walls—These walls are jointly used by two parties, whether owners or tenants.

    Defining

    Usually, a party wall separates two buildings or units and may be non-structural. If it's entirely within one property and not shared with others, it likely isn't a party wall.

    Consideration

    Understanding the existence of a party wall is crucial for property ownership and maintenance. Researching relevant agreements before purchase is advisable to comprehend each party's rights and duties.

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