Mount Alton, Knocklyon: sold prices
Off Knocklyon Road
There are 14 recorded sales on Mount Alton since 2010. Homes have sold for a median of €610,000 since January 2023, across 5 open-market sales; the most recent was 35 Mount Alton, at €595,000 in February 2025.
Mount Alton sales since 2010
Dashed line: two-year rolling median. Non-market sales and VAT-exclusive new-build prices excluded.
About Mount Alton
Mount Alton is a 1970s development of bungalows and larger two-storey homes in quiet cul-de-sacs off Knocklyon Road, a short walk from Knocklyon Shopping Centre. Marlay Park and St Enda's Park are nearby, as are Rathfarnham, Templeogue and Dundrum shopping centre. Local schools include St Colmcille's National and Community School, Loreto Beaufort, Sancta Maria College, Templeogue College and Terenure College. Public transport links serve the city centre and the M50.
Every recorded sale
| Address | Date | Asking | Sold | vs asking |
|---|---|---|---|---|
| 35 Mount Alton2 bed · 108 m² | 20 Feb 2025 | €550,000 | €595,000 | +8.2% |
| 7 Mount Alton5 bed · 272 m² | 18 Sep 2024 | €1,400,000 | €1,525,000 | +8.9% |
| 40 Mount Alton | 29 Sep 2023 | — | €525,000 | |
| 29 Mount Alton | 13 Sep 2023 | — | €610,000 | |
| 45 Mount Alton | 30 Jan 2023 | — | €1,210,000 | |
| 38 Mount Alton | 20 Nov 2020 | — | €450,000 | |
| 10 Mount Alton | 3 Apr 2020 | — | €610,000 | |
| 23 Mount Alton | 20 Feb 2020 | — | €550,000 | |
| 43 Mount Alton | 21 Oct 2019 | — | €1,060,000 | |
| 13 Mount Alton | 15 Sep 2017 | — | €750,000 | |
| 38 Mount Alton | 8 Jun 2016 | — | €375,000 | |
| 26 Mount Alton | 24 Apr 2013 | — | €307,000 | |
| 33 Mount Alton | 8 Aug 2012 | — | €330,000 | |
| 32 Mount Alton | 28 Mar 2012 | — | €335,000 |
Planning applications on Mount Alton
11 applications on record, newest first.
- Granted43 Mount Alton
Demolition of existing chimney and sunroom to rear of existing dwelling; construction of single-storey extension with rooflight to rear; two storey extension to side of dwelling with garage doors, dormer window to front and rooflights; single storey extension to front of dwelling; alterations to existing fenestration and material finish to front and side of existing dwelling, including new roof finish; attic conversion with dormer windows and rooflights to front and rear; widening of existing vehicular entrance to 3.5m and all associated site works.more…
Demolition of existing chimney and sunroom to rear of existing dwelling; construction of single-storey extension with rooflight to rear; two storey extension to side of dwelling with garage doors, dormer window to front and rooflights; single storey extension to front of dwelling; alterations to existing fenestration and material finish to front and side of existing dwelling, including new roof finish; attic conversion with dormer windows and rooflights to front and rear; widening of existing vehicular entrance to 3.5m and all associated site works.
- Granted10 Mount Alton
Amendment of the position of the entrance door in front porch of existing house; internal changes to the existing layout at ground floor & to convert the existing attic space into new bathroom & studio/bedroom with dormer window to side; a circular window in gable to the front & 'Velux' rooflights in the roof.more…
Amendment of the position of the entrance door in front porch of existing house; internal changes to the existing layout at ground floor & to convert the existing attic space into new bathroom & studio/bedroom with dormer window to side; a circular window in gable to the front & 'Velux' rooflights in the roof.
- Part granted, part refused38 Mount Alton
Ground floor entrance porch and skylight above with change of windows to the front; ground floor rear extension comprising of alterations and demolition works including the removal of the rear shed; first floor flat roofed extension providing new first floor habitable accommodation, including raising of roof ridge to rear and sides hosting photovoltaic panels to the property.more…
Ground floor entrance porch and skylight above with change of windows to the front; ground floor rear extension comprising of alterations and demolition works including the removal of the rear shed; first floor flat roofed extension providing new first floor habitable accommodation, including raising of roof ridge to rear and sides hosting photovoltaic panels to the property.
Appeal decision: Grant Permission
- Refused38 Mount Alton
Ground floor entrance porch and skylight above with change of windows to the front; ground floor rear extension comprising of alterations and demolition works including the removal of rear shed; first floor flat roofed dormer extension providing first floor habitable accommodation, including raising of roof ridge to rear and sides hosting photovoltaic panels and a strip roof light to the front of the property.more…
Ground floor entrance porch and skylight above with change of windows to the front; ground floor rear extension comprising of alterations and demolition works including the removal of rear shed; first floor flat roofed dormer extension providing first floor habitable accommodation, including raising of roof ridge to rear and sides hosting photovoltaic panels and a strip roof light to the front of the property.
Appeal decision: Refuse Permission
- Declared exempt26 Mount Alton
Proposed whole - house Energy refurbishment, and modest single-storey extension (32sqm) to rear of existing 1970's single-storey two bed semi-detached house (92sqm), to form a high quality and thermally efficient three-bed family home. Works to include the replacement of existing sliding entrance porch door (2sqm) with new insulated front door and glazed screen with door to rear garden, all with high performance glazing and frames. New pitched roof extension to have white painted render external wall finish, 1no. main + 3 no.minor rooflights, and new rainwater goods generally. Concrete roof tiles are to match existing roof in height and material. Solar tubes/panels to rear South-facing roof. All colours to match existing where possible.more…
Proposed whole - house Energy refurbishment, and modest single-storey extension (32sqm) to rear of existing 1970's single-storey two bed semi-detached house (92sqm), to form a high quality and thermally efficient three-bed family home. Works to include the replacement of existing sliding entrance porch door (2sqm) with new insulated front door and glazed screen with door to rear garden, all with high performance glazing and frames. New pitched roof extension to have white painted render external wall finish, 1no. main + 3 no.minor rooflights, and new rainwater goods generally. Concrete roof tiles are to match existing roof in height and material. Solar tubes/panels to rear South-facing roof. All colours to match existing where possible.
- Extension of time granted32 Mount Alton
Single storey extension to the side and rear including all associated site works. The extension will consist of an ensuite bedroom, WC, kitchen and utility room.more…
Single storey extension to the side and rear including all associated site works. The extension will consist of an ensuite bedroom, WC, kitchen and utility room.
- Granted11, Mount Alton, Dublin 16
Single storey extensions to front and rear.
- Granted32 Mount Alton
Single storey extension to the side and rear including all associated site works. The extension will consist of an ensuite bedroom, WC, kitchen and utility room.more…
Single storey extension to the side and rear including all associated site works. The extension will consist of an ensuite bedroom, WC, kitchen and utility room.
- Granted18, Mount Alton, Knocklyon, Dublin 16
Extension to the house by 5.9sq.m. to the side and front and 25.4sq.m. to the rear at ground floor and 28.8sq.m. to the side over existing garage and kitchen at first floor; the change of use from garage to a study together with modifications to internal arrangements and elevations; the provision of automatic gates to existing driveway and the increase in height of the front boundary walls to 1200mm high.more…
Extension to the house by 5.9sq.m. to the side and front and 25.4sq.m. to the rear at ground floor and 28.8sq.m. to the side over existing garage and kitchen at first floor; the change of use from garage to a study together with modifications to internal arrangements and elevations; the provision of automatic gates to existing driveway and the increase in height of the front boundary walls to 1200mm high.
- Granted25, Mount Alton, Knocklyon, Dublin 16
Demolish existing conservatory and shed and construct a single storey extension to the rear incorporating new chimney stack and attic conversion to facilitate 2 No. bedrooms with separate bathroom facilities, two rooflights to the front with five to the rear and internal alterations to existing ground floor planmore…
Demolish existing conservatory and shed and construct a single storey extension to the rear incorporating new chimney stack and attic conversion to facilitate 2 No. bedrooms with separate bathroom facilities, two rooflights to the front with five to the rear and internal alterations to existing ground floor plan
Appeal decision: Grant Permission
- Granted19 Mount Alton, Knocklyon, Dublin 16.
Conversion of garage at side of house to t.v. room with pitched roof over.
Homes on Mount Alton
Every address with a sale or listing on record.