Section 17 of the Residential Tenancies Act 2004 – Section 16:interpretation and supplemental

“alter or improve”, in relation to a dwelling, includes—

(a) alter a locking system on a door giving entry to the dwelling, and

(b) make an addition to, or alteration of, a building or structure (including any building or structure subsidiary or ancillary to the dwelling),

“behave in a way that is anti-social” means—

(a) engage in behaviour that constitutes the commission of an offence, being an offence the commission of which is reasonably likely to affect directly the well-being or welfare of others,

(b) engage in behaviour that causes or could cause fear, danger, injury, damage or loss to any person living, working or otherwise lawfully in the dwelling concerned or its vicinity and, without prejudice to the generality of the foregoing, includes violence, intimidation, coercion, harassment or obstruction of, or threats to, any such person, or

(c) engage, persistently, in behaviour that prevents or interferes with the peaceful occupation—

(i) by any other person residing in the dwelling concerned, of that dwelling,

(ii) by any person residing in any other dwelling contained in the property containing the dwelling concerned, of that other dwelling, or

(iii) by any person residing in a dwelling (“neighbourhood dwelling”) in the vicinity of the dwelling or the property containing the dwelling concerned, of that neighbourhood dwelling.