Site notice planning rules — 22% of Dublin applications invalid, and the notice is the top cause

The seven Greater Dublin Area councils we index declared 2,539 of the 11,409 applications they received in the 12 months to 12 September 2026 invalid: 22%. Where the register records a reason, the site notice leads. South Dublin County Council attributed 44 of its 95 invalidations to the notice, nearly half; Fingal 40 of 320; Dún Laoghaire-Rathdown 20 of 252. The white notice tied to a gate is the planning system's only guaranteed way of telling the people most affected that an application exists. Articles 17 to 19 of the Planning and Development Regulations 2001 say what it must contain, where it must be, when it goes up and how long it stays. A council that finds it deficient returns the application unread.

Two notices, one application

Article 17 requires two public notices before you lodge: one in a newspaper approved by the council, and a site notice. Both must be published or erected within the two weeks before the application is made. A day earlier and the council treats the notice as stale. The application form asks for the date of each and a copy of the newspaper page.

What the site notice must say

Schedule 3, Form No. 1 sets the wording. A valid notice names the applicant and the planning authority. It states the kind of permission sought: permission, outline permission, retention, or permission consequent on outline. It gives the location with the townland or postal address. It describes the development well enough to show its nature and extent: the number of houses, the floor area of an extension, the height of a mast, the change of use proposed. It says if the building is a protected structure. It carries the word "retention" where that is what is sought. It states that the application may be inspected or bought at the council's offices, and that a submission or observation may be made within five weeks of receipt on payment of the fee. And it carries the date it was erected.

Councils publish the form on their websites and most will check a draft.

Where and how

Article 19 governs the physical notice. It must be on durable material, securely fixed. It goes at the entrance to the land from a public road or, where there is none, on the boundary adjoining a public road, so that it is easily visible and legible to people using the road. It stays for five weeks from the date the council receives the application, and must be renewed if it is removed, defaced or becomes illegible. Durable means laminated or on a printed board. Paper in a plastic sleeve fails the first rain. Photograph the notice on the day it goes up; the council can ask for the photograph.

When is the notice yellow?

Article 19(4) requires a yellow background where another application was made for the land within the previous six months: a re-application after a refusal or withdrawal, a revised scheme, a follow-up. The purpose is to tell neighbours who saw the earlier white notice that something new is afoot. For you as a neighbour, a yellow notice is a signal that the register history is worth reading before you write.

What goes wrong

Councils validate every application in the first days, and article 26 requires one that does not comply to be returned with the fee. The reasons that recur: the notice went up more than two weeks before lodging; the description differs between site notice, newspaper and drawings; the notice is not legible from the road; the date is missing; a retention notice omits "retention"; yellow was required and white was used.

The explicit count is a floor. Dublin City recorded 942 invalid applications in those 12 months, 37% of everything it received, and gave a reason for none of them in the fields we hold. Kildare, Meath and Wicklow carry no invalid marker at all in their feeds. South Dublin is the only council that names the cause on every file, which is why its 46% share is the number we trust. Three files from one summer: Dún Laoghaire-Rathdown returned 56 Shrewsbury Lawn, Cabinteely on 12 August 2026 marked "declare invalid (site notice)"; South Dublin returned 60 Elkwood, Ballyroan on 4 August 2026; Fingal returned a commercial application at Swords North Business Park on 8 July 2026 as "invalid application due to site notice".

Our reading: get the council's own sample notice, copy its wording exactly, and put the notice up on the day you lodge, not the week before. Half of South Dublin's invalidations are a €0 mistake that costs the applicant a month and the neighbours a second window they may not notice.

Where a notice is inadequate but the application is otherwise valid, it blew down in week three say, article 22 lets the council require a fresh notice rather than invalidate. The five weeks then run again from the new notice.

For neighbours: reading a site notice

The notice tells you three things. The applicant and description say what is proposed. The council and reference let you find the drawings on the council's register, or in our Explorer by address. The date the council received the application starts your five-week clock; if the notice carries only the erection date, the receipt date is on the register entry within a few days.

If you cannot find a notice for works you believe are proposed, check the register by address first. The notice may have come down after its five weeks, or the works may be exempt and need none. If an application is live and the notice is missing or illegible, tell the planning office in writing. The council can require it to be replaced and, if the failure was at lodging, may treat the application as invalid. A missing notice is also a ground of appeal to An Coimisiún Pleanála (formerly An Bord Pleanála) if the decision goes against you.

Check the register near you

The Explorer shows every live application near an address with its receipt date and days left, and Find starts from your own street. The South Dublin County Council place page and the Rathfarnham-Templeogue page carry the live invalid rate; open windows are on the deadlines page.

Figures from the register on 12 September 2026 (live callouts refresh hourly); law checked 12 September 2026. Check with the council or a planning consultant before relying on this.

Frequently asked questions

How long does a planning notice have to be up?

Five weeks from the date the council receives the application (article 19 of the 2001 Regulations), and it must have been erected within the two weeks before the application was lodged.

What does a yellow planning notice mean?

Another application was made for the same land within the previous six months. The yellow background is required by article 19(4) to alert neighbours that this is a repeat or revised application.

Where does a site notice have to be placed?

At the entrance to the land from a public road, or on the boundary adjoining a public road, so that it is easily visible and legible to people on the road. It must be on durable material and securely fixed.

What happens if the site notice is wrong?

The council returns the application as invalid under article 26 and you start again with new notices. If the notice is deficient in a minor way the council may instead require a new notice under article 22.

Can I object if there was no site notice?

The absence of a valid notice is a ground for the council to invalidate the application, and a ground of appeal. Report it to the planning office in writing during the five-week window, and make your observation anyway so you keep the right to appeal.