GrantedChange of useDecided 17 April 2026

20/21 Denmark Street Great, Dublin 1

Conversion of office space into two studio apartments in a protected structure.

WEB1411/26 · Dublin City Council · Lodged 19 September 2025

Reference: WEB1411/26
Authority: Dublin City Council
Register status: Decided
Type: Permission
Received: 19 September 2025

Summary

AI-generated

The project involves the refurbishment of a protected structure at 20-21 Denmark Street Great. It includes changing the use of former ground-floor and basement office space into two residential studio apartments, installing a new external staircase, and carrying out basement repairs.

Change of useprotected structureapartmentsrefurbishment

Residential units: 2

Generated from the description above by an AI model and may contain mistakes. The council’s description is the authoritative record.

Official record

Development description

Protected strucure, change of use: the development will consist of the refurbishment of 20-21 denmark street great, dublin 1, d01v2c9, ireland a protected structure included in north great george’s street architectural conservation area, to include the following interventions: (a) change of use of the former office space at ground-floor and basement levels to two residential studio apartments, one at each level, (b) installation of additional bollards along the footpath in front of the site, facing nos, 20–21 great denmark street, together with the reinstatement and making good of the paving and street surface, all above the vaulted footprint of the protected structure basement boundary, (c) introduction of a new external staircase within the courtyard to provide access to the basement, including the formation of a new entrance gate to the external stair. This will require the partial removal of the existing railing and boundary wall. (d) removal of deteriorated cement render from the basement courtyard walls and re-rendering with lime plaster, together with the provision of tree black cast-iron ventilation grilles to the basement walls, including making good to match the existing render beneath the string course to the paving along great denmark street, (e) opening up of the existing vaults beneath the footpath, which face onto the courtyard, (f) repointing of the top corner of the east gable at hopper level with lime mortar to match the existing, including realignment and routine maintenance of the rainwater pipe (rwp) and hopper, (g) restoration of the shopfront, (h) replacement of the existing plain-glass fanlight with a single-glazed ornate fanlight, (i) replacement of the existing polycarbonate opaque glazing in the timber windows adjacent to the entrance door with single-glazed toughened frosted glass, (j) replacement of the two courtyard-facing basement single-glazed 2-over-2 sash windows with either 6-over-6 vacuum-glazed units (6.1mm) or single-glazed sash windows, (k) replacement of the courtyard basement entrance door, (l) cleaning of the stone basement windowsills, granite plinth, and entrance steps, (m) reinstatement of the missing corner railing post and sections of railing at street level, including re-lining of the stonework to the front railing wall, (n) removal of concrete paving within the basement courtyards and replacement with gravel, (o) re-rendering, using lime, of areas of failed render to the chimney, (p) treatment or replacement, as required, of rotten rafter ends and wall plates to the roof, together with the installation of fire-rated breathable insulation within the attic space, (q) introduction of one new bathroom and lobby at each level for each studio apartment, with associated new stud partitions and doors, (r) removal of the existing basement concrete floor and provision of a new partially insulated, radon-proof concrete floor, (s) replacement and upgrading of the existing basement bathroom to current standards, (t) structural consolidation of the basement ceiling beneath the footpath, including the introduction of new supporting steel beams and replacement of deteriorated timber lintels with new precast concrete lintels, (u) repair of wall cracks, including structural strengthening works to the chimney breast at basement level, (v) tanking of basement apartment walls and floors, together with associated damp mitigation measures, (w) introduction of a new fire-rated plasterboard ceiling at basement level, (x) removal and replacement of basement stairs and modern partitions, (y) removal and disposal of poor-quality modern interventions, including kitchens, bathrooms, mezzanines, shelving and counters, followed by a new fit-out, (z) replacement of existing internal doors with fire-rated doors, (aa) repair of existing plasterwork, (ab) upgrading of suspended timber floors to improve fire resistance, structural performance, and sound insulation, (ac) introduction of new mechanical and electrical services, including a fire detection and alarm system for the building, and provision of new service shafts located within the rear stair wall, including reinstatement of stair coving to match the existing, (ad) replacement of existing site wastewater drainage and associated works, (ae) provision of two cctv cameras and an intercom adjacent to the main entrance door, (af) redecoration of all internal spaces, (ag) ongoing maintenance of the building, (ah) all ancillary works required to facilitate the above

Land-use zoning

What this land is zoned for

Z8: Georgian Conservation Areas

“To protect the existing architectural and civic design character, and to allow only for limited expansion consistent with the conservation objective.”

National zoning type: General

Objective set by the Development Plan 2022-2028 (2022–2028). The planning authority decides each application on its own merits — this is the zoning context, not a compliance assessment.

Read the zoning objectives in the development plan

Built & sold

What happened next

Beyond the decision: whether this development was built, and what property here has sold for.

Recent sales nearby

within 500 m

Residential Property Price Register sales within 500 metres of this site
Address	Date	Price	Distance
Apartment 3 The Mews, Mount Eccles Court, North Great Georges Street	Dec 2025	€375,000	117 m
22 The Mews, 41 North Great Georges St, Dublin 1	Nov 2025	€260,000	119 m
18 The Mews, 41 North Great Georges, Dublin 1	Jul 2026	€316,000	119 m
Apt 1, Headfort Court, 36 37 Hill St Dublin 1	Dec 2025	€255,000	137 m
39 Temple Place, Grenville St, Dublin 1	Jan 2025	€270,000	170 m
Apt 15, Temple Place, Grenville St Dublin 1	Jan 2026	€387,500	170 m
36 Temple Place, Grenville St, Dublin 1	Feb 2025	€279,000	170 m
Apt 22, Temple Place, Grenville St Dublin 1	Apr 2025	€261,000	170 m

Nearby properties, not this site — a guide to local values.

Sources: Building Control Management System (commencement notices) and the Residential Property Price Register, licensed under CC BY 4.0. Records are matched to this application by location and may not be exhaustive; always confirm against the official source before relying on them.

Key dates

Timeline

Application received19 September 2025
Decision due21 April 2026
Decision issued17 April 2026
Permission expiry10 July 2031

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