Mason Hayes & Curran LLP 's Planning & Environment team examines a recent Supreme Court judgment endorsing the harmless error doctrine and clarifying when procedural defects may be overlooked.

Mason Hayes & Curran LLP is a leading Irish law firm based in Dublin with offices in San Francisco, New York and London, three of Ireland’s most important conduits for inward investment to Ireland. We are a business law firm with extensive knowledge and experience in the following sectors: Energy, Technology, Financial Services, Built Environment and Healthcare & Life Sciences. Why MHC? As a leading progressive law firm, we offer an excellent remuneration and benefits package, access to an enviable client base and strong career progression for the right candidates. We are proud of, and value the organisation’s friendly and informal working atmosphere. Our open plan layout is unusual for a law firm and means that everyone has the same desk, even the Managing Partner. We encourage staff involvement at all levels and are committed to fostering a climate of open communication across the firm. Our Firm Mason Hayes & Curran LLP is a business law firm with 124 partners. We understand the challenges international organisations face when investing or locating in a foreign country. We assist them during initial establishment, and in meeting their ongoing legal and commercial imperatives. Quality Approach We empower our international and domestic clients by giving focused recommendations and a clear understanding of options. This allows clients to confidently make quality, informed decisions. We pride ourselves in working collaboratively and openly. We believe this creates a shared perspective and builds trust so that solutions are developed quickly and together. We are versatile, recognising each client’s preferred way of working and responding to it. CSR Corporate social responsibility is a natural fit with the way we do business. We invest in our society and communities through a range of programmes. Our core focus is education.