South Dublin development plan
The South Dublin County Development Plan 2022-2028 sets the rules South Dublin County Council uses to decide planning applications. Here is what it controls, the local rules that matter to householders, and where to read the official plan.
The plan at a glance
- Plan
- South Dublin County Development Plan 2022-2028
- Period
- 2022 to 2028
- Status
- Made 22 June 2022, in effect from 3 August 2022. Variation No. 1 (Clondalkin) made 9 March 2026
- Checked
- 29 Oct 2026
Some objectives are excluded under a Ministerial Direction. The council also publishes a House Extension Design Guide.
What a development plan controls
Every council has one. It is written for a set number of years and changed in steps called variations. It covers four things that matter most to a homeowner.
Every piece of land has a zoning, such as residential, town centre or agriculture. The zoning says what can be built there. An extension is usually fine in a residential zone. A new house on land zoned for agriculture usually is not, unless a rural housing rule allows it.
Outside towns and villages, the plan decides who can build a one-off house. Councils often ask for local ties, such as family land or years of living in the area, and may attach an occupancy condition.
The plan uses flood zones. New homes in Flood Zone A or B can face a justification test and a flood risk assessment. The official flood maps are on floodinfo.ie.
The plan lists protected structures and architectural conservation areas. If your home is in one, works that are normally exempt may need permission. You can ask the council for a declaration under section 57.
Key local policies in South Dublin
Plain-English summaries of rules in the South Dublin County Development Plan 2022-2028 that often decide a householder's project. Each one links to the council's own text.
Building a house in the countryside
Who can build a one-off rural house, and the conditions that come with it.
Rural housing applies to land zoned RU, HA-DM, HA-LV and HA-DV. Each case is judged individually. You must show a genuine need to live near your work (where the work relates to the rural community), or close family ties with the rural community. You must not have already been granted permission for a new rural dwelling, and you must send evidence, a map of family-owned land and a reason for the site you chose.
Source: Chapter 12, section 12.6.9 Rural Housing; policy in Chapter 6, section 6.9Extensions, attics and garden rooms
The design rules the council uses when it looks at work on an existing home.
The design of an extension must have regard to the pattern of development in the immediate area and to the council's House Extension Guide, or any later standards. The council publishes a House Extension Design Guide on its website, which covers avoiding overlooking, overshadowing and overbearing effects on neighbours.
Source: Chapter 12, section 12.6.8 Residential Consolidation, ExtensionsA family flat for an immediate family member should not generally exceed 50% of the floor area of the existing house. It must be reached through the front door of the main house, and any outside doors are limited to the side or rear. The council may attach conditions that it cannot be sold or leased separately and must return to a single home when no longer needed.
Source: Chapter 12, section 12.6.8, Family FlatsSummaries checked 29 Oct 2026. They are plain-English guides written from the council's plan. They may be incomplete or out of date, and a variation can change the wording. They are not legal advice, so please check anything important with the council.
How it affects your project
The plan matters most when a project needs planning permission. Many small jobs are exempt, so check that first.
Many small extensions are exempt, so the plan only counts if you need permission, or your home is protected, or an earlier permission has conditions. When permission is needed, the council checks the design against the plan, for example overlooking, daylight and the garden left. See the South Dublin extension rules. Read the extension guide.
Small sheds are often exempt. A garden room used as a separate home, or a large one close to a boundary, can need permission, and then the plan's rules on extra accommodation apply. Read the shed guide.
A new house needs land where the zoning allows it. In the countryside, the rural housing rules decide who can build. Flood zones, access and wastewater also count. See the South Dublin rural housing rules. Read the new house guide.
Where to read the official plan and map
Always check the council's own copy. Plans are varied from time to time, and the zoning map is the legal record of how your land is zoned.
Check your South Dublin site before you apply
The pre-planning report covers zoning, protected structures, ground conditions and every application near your address, with the decisions.
Common questions about the South Dublin development plan
What is the South Dublin development plan?
The South Dublin County Development Plan 2022-2028 is the main planning policy document for South Dublin County Council. It covers 2022 to 2028 and sets the zoning of land and the local rules the council uses when it decides planning applications.
Where can I see the zoning for my land in South Dublin?
Zoning maps are part of the plan. Open the plan on the South Dublin County Council website, or use the national viewer at myplan.ie, which shows zoning for councils that have supplied it. Plans can be varied between full reviews, so check the council's own copy for the latest.
Does the South Dublin development plan matter if my project is exempt?
If your extension or shed is exempt development, you do not need planning permission, so the council does not assess it against the plan. The plan still matters if your home is a protected structure or in a conservation area, or if an earlier permission has conditions. Our free checker screens your project.
Can I build a house on family land in South Dublin?
It depends on the rural housing rules in the plan and on exactly where the site is. Councils usually ask for proof of local ties and attach an occupancy condition. The summaries on this page show what the South Dublin plan says, and the council's pre-planning meeting is the best way to test your case.
Plan details compiled from South Dublin County Council's own website, source page, checked 29 Oct 2026. This page is a guide, not legal advice. Sources and methodology.