21 Sydney Ave
Blackrock, Ireland
Estimated value
€1,610,000
Wider bands mean more uncertainty in the current local evidence.
Estimate band ±24% around the midpoint.
+9.6% vs today's estimate based on HomeIndex's forward projection.
Area signals
Signals derived from local sales coverage for 21 Sydney Avenue, Blackrock, Dublin, Ireland.
Significantly higher than the Dublin median
Compares the estimated home value against the median sale price of homes in Dublin over the last 12 months.
| Estimated value | €1,610,000 |
|---|---|
| Dublin median | €485,000 |
| National median | €385,000 |
Significantly lower than the Dublin median
The area's median annual price change over the last 3 years, compared against Dublin's growth rate.
| This area | -1.5% |
|---|---|
| Dublin | 4.9% |
| National | 6.0% |
Among the most active areas in Ireland
Number of home sales per square kilometre in this area, compared against Irish norms.
| This area | 19.90/km² |
|---|---|
| Typical Irish activity | 6.00/km² and up |
| Grade | Very active |
Comparable sales
- 20 Sydney Avenue sold €1,300,000 on 2022-03-23
- 42 Sydney Avenue sold €1,890,000 on 2023-11-29
- 48 Sydney Avenue sold €1,550,000 on 2024-11-19
- 10 Green Road sold €820,000 on 2025-10-30
- 46 Frascati Park sold €1,584,000 on 2025-09-08
Sales history
21 Sydney Ave, Blackrock last changed hands in December 2021, selling for €1,500,550. The price rose 7% from the last recorded sale (€1,500,550) to today's HomeIndex estimate.
- Sold for €1,500,550 in December 2021
Area intelligence
Nearby schools, transport and parks that shape day-to-day life at 21 Sydney Avenue, Blackrock, Dublin, Ireland.
Nearby schools
8 within 3 km
- Carysfort National School · Primary school · 250 m · 3 min walk
- Benincasa · 370 m · 4 min walk
- Blackrock College · Secondary school · 850 m · 10 min walk
- Guardian Angels National School · Primary school · 1.1 km · 13 min walk
- St Augustine's School · 1.2 km · 14 min walk
- Our Lady of Mercy Convent School · 1.3 km · 15 min walk
- Scoil Lorcáin · Primary school · 1.3 km · 15 min walk
- Newpark Comprehensive Secondary School · Secondary school · 1.3 km · 16 min walk
Nearby transport
8 within 1.5 km
- Mount Merrion - (Mt Merrion / South Hill Ave) · Bus stop · 290 m · 3 min walk
- Mount Merrion Avenue, Sydney Avenue · Bus stop · 300 m · 4 min walk
- Frascati Road, Frascatio Shop Centre · Bus stop · 320 m · 4 min walk
- Frascati Road · Bus stop · 320 m · 4 min walk
- #3084 Frascati Road, Frascati Centre · Bus stop · 320 m · 4 min walk
- Carysfort Avenue · Bus stop · 330 m · 4 min walk
- Mount Merrion Avenue, Sydney Avenue · Bus stop · 330 m · 4 min walk
- #6334 Frascati Road, Frascati Centre · Bus stop · 340 m · 4 min walk
Nearby parks
8 within 3 km
- Carysfort Park · Park · 540 m · 6 min walk
- Rockfield Park · Park · 760 m · 9 min walk
- Blackrock Park · Park · 810 m · 10 min walk
- Temple Park · Park · 930 m · 11 min walk
- Booterstown Marsh · Nature reserve · 1.2 km · 15 min walk
- Booterstown Park · Park · 1.3 km · 15 min walk
- Belgrave Square · Park · 1.5 km · 18 min walk
- Booterstown Marsh · Nature reserve · 1.6 km · 19 min walk
Local estate agents
Estate agents active near 21 Sydney Avenue, Blackrock, Dublin, Ireland, ranked by nearby recorded sales.
- Lisney Sotheby's International Realty Blackrock · 19 nearby sales · most recent sale June 2026
- Sherry FitzGerald Blackrock · 17 nearby sales
- DNG Rock Road · 12 nearby sales · most recent sale May 2026
- Janet Carroll Estate Agent · 9 nearby sales
- Beirne & Wise (Blackrock) · 6 nearby sales
- Churches Estate Agent · 5 nearby sales
Property valuation for 21 Sydney Avenue, Blackrock, Dublin, Ireland by HomeIndex - independent property valuation for Ireland.