
17 Castlebyrne Park, Blackrock, County DublinA94N622
€549,000
3 Bed~1 Bath~82 m²~BER F
What you'll like:
- Prime Blackrock Location: Situated in a highly sought-after South Dublin neighborhood offering exceptional long-term capital growth and desirability for families.
- Excellent School Proximity: Surrounded by numerous prestigious primary and secondary educational institutions, significantly enhancing future property resale value and family convenience.
- Direct Park Access: Features a hidden direct pathway to Rockbrook Park, providing wonderful local green space, sports facilities, and playgrounds nearby.
- Solid 1950s Construction: Built as a robust traditional Corporation house featuring solid structural walls that offer a durable baseline for renovations.
- Generous End-Of-Terrace Plot: Benefits from an advantageous side passage leading to a spacious rear garden that facilitates construction access.
- Off-Street Parking Space: Includes a dedicated front garden area with ample room for multiple vehicles to park off the main road safely.
- Blank Canvas Potential: Presents a rare opportunity to completely modernize and stamp your own design preferences throughout the entire interior layout.
- Substantial Extension Scope: Offers physical space and garden depth to extend the footprint to the rear, side, or front subject to permissions.
- Attic Conversion Prospects: Features a spacious attic volume with potential for conversion into an extra habitable room like neighboring properties have done.
- DART Station Proximity: Located a short distance from local rail transport links, ensuring convenient commuting access into Dublin city centre.
- Coastal Lifestyle Access: Positioned close to the sea and Blackrock village amenities, delivering an appealing coastal suburban lifestyle for residents.
- Original Layout Retained: Preserves most of the untouched period room arrangements, allowing buyers to reconfigure internal spaces without undoing poor past work.
- Open Living Space: The front reception rooms have already been combined into one large living area facing the road for easier furniture layout.
- Understairs Storage Pantry: Includes a useful enclosed storage space beneath the staircase for household items and kitchen overflow provisions.
- Split Level Staircase: Features a traditional split-level stair arrangement separating the bathroom amenities from the primary sleeping quarters effectively.
- Three Bedroom Footprint: Provides three well-proportioned bedrooms upstairs that suit growing families or home office requirements after interior updates.
- Stable Asking Price: The recorded asking price has remained completely unchanged since tracking began, suggesting a firm vendor pricing strategy without erratic adjustments.
- Established Neighborhood: Located within a mature, settled residential enclave with a strong community feel and well-maintained neighboring properties.
- Endless Reconfiguration Options: The dated floor plan provides complete architectural freedom to create an open-plan kitchen and dining zone overlooking the garden.
- Investment Upside: Buying a low BER property at this price point allows value-add investors to capture significant equity upon completing energy retrofits.
But keep in mind:
- Poor BER Rating F: The very low energy efficiency rating requires extensive insulation, window upgrades, and heating overhauls to achieve modern comfort standards.
- Substantial Renovation Required: The property is heavily dated and demands a significant capital expenditure budget beyond the purchase price to become habitable.
- Outdated Bathroom Setup: Features a split-level layout with a separate bathroom and WC that likely requires structural consolidation for modern family living.
- Small Original Kitchen: The existing kitchen and galley extension are cramped, necessitating an immediate and costly rear extension for proper functionality.
- Planning Permission Needed: Major extensions or attic conversions will require local authority planning approval, adding time, risk, and architectural fees.
- Historic Corporation Roots: Buyers should investigate potential historic covenants or restrictions tied to former local authority land ownership before exchanging contracts.
- Potential Asbestos Presence: Given the 1950s construction era, buyers must budget for professional surveys to check for hazardous materials prior to demolition works.
- Heating System Overhaul: The primitive heating infrastructure likely needs a complete replacement with a modern heat pump or high-efficiency boiler system.
- Single Bathroom Constraint: Having only one bathroom serving three bedrooms creates morning bottlenecks that will require adding an ensuite or downstairs WC.
- Wiring and Plumbing Upgrade: Original electrical wiring and copper plumbing are likely obsolete and must be fully replaced to meet current safety codes.
- Window Replacement Costs: Single or older double-glazed windows will need total replacement to improve the failing F-grade energy performance certificate.
- Garden Landscaping Effort: The large rear garden is a blank slate requiring substantial investment in clearing, leveling, drainage, and boundary fencing.
- No Guarantees on Planning: Success with attic and rear extensions depends on local council discretion, so buyers should not assume approval is automatically guaranteed.
- Construction Inflation Risks: Managing a major renovation project exposes the buyer to volatile builder labor costs and material price fluctuations currently in the market.
- Temporary Alternative Accommodation: The scale of modernization required means buyers will likely need to rent elsewhere during the heavy construction phase.
- Narrow Side Access Check: Buyers should verify the exact width of the side passage to ensure heavy machinery and scaffolding can reach the rear garden.
- Drainage System Inspection: Older clay drainage pipes beneath the property should be CCTV surveyed to check for root intrusion or structural collapse risks.
- Ventilation and Damp Risk: Poor insulation and lack of modern extraction fans in the kitchen and bathroom may have caused hidden damp issues to investigate.
- Roof Structure Evaluation: The timber roof rafters and coverings should be professionally inspected to ensure no rot or sagging exists before converting the attic.
- Resale Profit Margin Squeeze: High baseline purchase prices combined with expensive renovation costs mean buyers must calculate potential future ceiling values carefully.
Price positioning
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- The asking price of five hundred forty-nine thousand euros appears undervalued relative to local market norms, largely because it sits below recent transactions for properties of similar size in the immediate estate.
- Under-valuation signals include a poor energy rating of F combined with the extensive modernization required to bring the 1950s layout up to contemporary living standards for a three-bedroom house.
- Factors that could strongly support or push past this asking price include the highly sought-after Blackrock location, off-street parking, a generous rear garden, and substantial potential for side or attic extensions.
- Relevant considerations encompass steady buyer demand in prime Dublin suburbs alongside the significant capital expenditure a prospective purchaser will need to invest in energy efficiency upgrades.
Build Analysis
What we know from similar construction types
- The property is a 1950s former Dublin Corporation semi-detached/end-of-terrace house built with traditional solid-wall construction methods typical of that era.
- Given the 1950s construction and poor BER rating of F, the buyer should investigate the presence of original single-glazed windows, lack of roof and wall insulation, and outdated electrical and plumbing systems.
- The listing notes potential for extending to the front, side, or rear, as well as converting the attic; the buyer should verify local planning precedents and obtain professional structural advice regarding the feasibility and costs of such extensions.
- The layout retains much of the original configuration, including a split-level bathroom and separate WC, which may require reconfiguration to meet modern living standards.
Retrofit Cost*
Possible renovating / insulating expenditure
- Estimated deep-retrofit cost is approximately €50,000 to €75,000 for an 82 m² property with a BER rating of F.
- Reasoning: Achieving an A-rating for a 1950s semi-detached house of this size requires comprehensive external wall insulation, internal or floor insulation, window and door replacements with high-performance double or triple glazing, upgrading the heating system to a heat pump or modern condensing boiler, and sealing air tightness gaps.
Heating cost*
Estimated expense to heat this property every year
- Estimated annual heating cost: approximately 2,200 to 2,800 euro.
- Explanation: Given the poor F energy rating and the 82 square meter floor area, the property likely suffers from significant heat loss, requiring higher energy consumption to maintain comfortable temperatures until energy-efficiency upgrades are made.
Environmental checks
Area-level evidence and things to investigate
Air quality
Nearby sites
Landfills
None foundWaste facilities
None foundIndustrial facilities
None foundNearby infrastructure
Overhead electricity lines
None foundUnderground electricity cables
None foundFlood Safe
8/10Water overflow reports to follow up
- The property is located in Blackrock, County Dublin, sitting well away from major coastal flood zones and primary river corridors.
- Official mapping shows no recorded historical flood events or designated risk zones immediately affecting this residential estate.
- While general surface water accumulation can happen during extreme rainfall anywhere, the local topography does not present a high apparent risk of significant flooding.
Recent Local Sales
Verified residential transactions published in the previous five years
Sales on the same street or estate
93 CASTLEBYRNE PARK, NEWTOWNPARK AVE, BLACKROCK
- Sale date
- Declared sale price
- €597,000.00
15 CASTLEBYRNE PARK, NEWTOWN PARK AVE, BLACKROCK
- Sale date
- Declared sale price
- €667,500.00
70 CASTLEBYRNE PARK, BLACKROCK, DUBLIN
- Sale date
- Declared sale price
- €528,000.00
57 CASTLEBYRNE PARK, BLACKROCK, DUBLIN
- Sale date
- Declared sale price
- €645,000.00
50 CASTLEBYRNE PARK, BLACKROCK, DUBLIN
- Sale date
- Declared sale price
- €470,000.00
Recent sales in the wider Blackrock area
DAWSON LODGE, CROSS AVE, BLACKROCK
- Sale date
- Declared sale price
- €2,300,000.00
18 SHANDON PARK, BLACKROCK, DUBLIN
- Sale date
- Declared sale price
- €960,000.00
2 MOUNTBROOK, STILLORGAN RD, BLACKROCK
- Sale date
- Declared sale price
- €475,000.00
APT 3 FRASCATI HALL, SWEETMANS AVE, BLACKROCK
- Sale date
- Declared sale price
- €550,000.00
1A ARDMEEN PARK, BLACKROCK, COUNTY DUBLIN
- Sale date
- Declared sale price
- €1,000,000.00
Source: Property Services Regulatory Authority (PSRA), Residential Property Price Register (PPR). Matching uses address information published by the PPR rather than measured map distance. It may omit nearby properties on differently named streets.
Last Sale
A confidently matched previous PPR transaction for this property
No confidently matched previous sale was found in the Property Price Register.
Buyer fees*
Associated expenses guide
- Estimated stamp duty: €5,490 — 1% of €549,000.
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Based on the asking price shown on this page, using standard residential stamp-duty rates. No adjustments are made for VAT, reliefs, mixed-use property or additional land. The final purchase price and your circumstances may change the amount payable.
- Solicitor legal fees: approximately 1,500 to 3,000 euro plus VAT.
- Land registration fees: approximately 400 to 800 euro depending on property value and registry type.
- Property valuation fees: approximately 150 to 350 euro for a standard mortgage valuation.
- Surveyor fees: approximately 500 to 1,200 euro depending on the depth of the survey required for an 82 square meter home.
- Annual home insurance: approximately 400 to 800 euro depending on the level of buildings and contents cover chosen.
Forum Talk
What people are saying about this area
- Local residents and community forums frequently highlight Blackrock as a highly desirable residential area due to its coastal setting and established village amenities.
- Discussions on neighbourhood platforms often focus on the strong demand for 1950s housing stock in the locality, particularly properties offering scope for modernisation and extensions.
- Community groups frequently note the excellent concentration of well-regarded primary and secondary schools situated within walking distance of Newtownpark Avenue.
- Local commentary often emphasizes the convenience of proximity to the DART station and frequent transport links connecting the area directly to Dublin city centre.
LifeFit Assessment
How well this property may suit your lifestyle
Family
7 areas- Young Children8/10
The property features a spacious rear garden and is located near excellent primary schools such as Guardian Angels and Carysfort National, making it a strong option for young families willing to undertake modernization.
- Teenagers7/10
With three bedrooms and proximity to secondary options like Newtown Secondary, Blackrock College, and Sion Hill, there is good potential here, though the 82 square meter footprint is modest for growing teenagers.
- Multi-generational Living4/10
The current layout and 82 m² floor area are somewhat compact for multi-generational living, though substantial gardens offer scope to extend subject to planning permission.
- Single Buyers6/10
An asking price of €549,000 for a fixer-upper in Blackrock presents an entry point for single buyers with renovation capital, though the poor BER rating of F requires immediate energy-upgrade investment.
- Couples7/10
Acts as an ideal blank canvas for couples looking to put their stamp on a home in a prime location, provided they have the budget and vision for extensive renovations.
- Empty Nesters5/10
While the single-level flow is absent and stairs are required, the property offers manageable proportions once modernized, though maintenance of the large garden should be considered.
- Retirees4/10
The property requires significant upgrading, including addressing the low BER rating and updating the bathroom configuration, which may not appeal to retirees seeking turn-key comfort.
Work
3 areas- Remote Working6/10
The 3-bedroom layout allows one of the rooms to be adapted into a home office, though broadband infrastructure should be verified.
- Hybrid Commuting9/10
Outstanding connectivity via the nearby DART station and arterial routes makes hybrid commuting into Dublin city highly convenient.
- Retired5/10
Proximity to local amenities is a plus, but the extensive renovation work required may deter retirees unless managed by contractors.
Practical
8 areas- Ageing in Place4/10
The split-level stairs separating the bathroom and WC, along with the two-story layout, present challenges for long-term ageing in place without structural adaptation.
- Low Maintenance3/10
With an F BER rating, original 1950s elements, and the need for comprehensive modernization, this property requires significant ongoing maintenance and capital investment.
- Secure Gated Entry2/10
This is an open, semi-detached suburban home with off-street parking rather than a secure gated community.
- Minimalist Design3/10
The current cellular layout is traditional, requiring architectural reconfiguration to achieve a clean, minimalist aesthetic.
- Flexible Floor Plans8/10
Described as a blank canvas with potential to extend to the front, side, rear, or into the attic subject to planning permission, offering high layout flexibility.
- Heritage Home4/10
Built in the 1950s as a Dublin Corporation house, it features solid construction and period character, though it is not a protected heritage structure.
- Ecological Setup2/10
The poor F BER rating indicates a heavy carbon footprint and low energy efficiency, requiring substantial retrofitting to achieve an eco-friendly setup.
- Outdoor areas8/10
Benefits from a useful side passage, a spacious rear garden, and direct access to Rockbrook Park's green spaces, woods, and playgrounds.
Interests
9 areas- Gardening8/10
The generous rear garden and front garden area provide an exceptional blank canvas for keen gardeners to design and cultivate.
- Walking8/10
Direct access to Rockbrook Park and the walkability to Blackrock Village, local shops, and the coast make this ideal for walking enthusiasts.
- Gym6/10
Proximity to Blackrock provides access to local wellness and fitness amenities, though specific facilities should be verified locally.
- Cycling7/10
The established suburban street network allows for straightforward cycling to nearby coastal amenities and commercial hubs.
- Golf6/10
South County Dublin hosts several golf clubs within a reasonable driving radius, though none are directly adjacent.
- Fishing4/10
Coastal proximity allows for some sea angling opportunities nearby, but this is primarily a suburban residential location.
- Horse Riding3/10
Equestrian facilities are scarce in this densely populated urban-suburban area.
- Water Sports6/10
Proximity to the Dublin coastline provides reasonable access to marine and water activities.
- Entertaining7/10
The spacious rear garden and potential to open up the ground-floor layout offer great scope for hosting guests once modernized.
Lifestyle
5 areas- Quiet Living6/10
Located in an established residential park just off Newtownpark Avenue, offering a generally peaceful suburban environment despite its central setting.
- Rural Living1/10
This is an urban-suburban setting in Blackrock, County Dublin, entirely removed from rural characteristics.
- Village Living8/10
Direct access to Rockbrook Park and proximity to the centre of Blackrock provides a distinct village feel with local amenities and community spaces close at hand.
- Coastal Living7/10
The location is a short distance from the coast and the DART station, offering easy access to seaside amenities.
- Urban Living8/10
Situated in prime Blackrock with superb transport links like the DART, schools, shops, and direct connectivity to Dublin city centre.
Social
6 areas- Community Involvement7/10
An established 1950s neighborhood with active local groups, parks, and community facilities like the local tennis club nearby.
- Café Culture8/10
Blackrock Village offers a vibrant selection of cafes, eateries, and social spots within easy reach.
- Nightlife6/10
Local pubs and restaurants are available in Blackrock, with more extensive nightlife easily accessible via the DART in Dublin.
- Health/Wellness groups7/10
Good access to local parks, walking routes, and community clubs supports active health and wellness pursuits.
- Networking Opportunities7/10
Proximity to affluent South Dublin suburbs and tech/business corridors via transport links facilitates professional networking.
- Tech-Hub Connectivity8/10
Excellent transit links via the DART provide direct access to Dublin's major employment and tech hubs.
Listing information
- Agent
- Churches Estate Agent
- Phone
- 01 559 5000
- Current status
- active
- Published on HouseDelve
- 11 November 2026
- Correction
- Report an issue
HD-4AB8BBHouseDelve · Republic of IrelandReport checks
Sources used: Public marketplace, Property Price Register, and grounded web research where available.
Automated quality checks: Passed
* Estimate — not advice. Actual costs and outcomes can vary materially. Obtain current quotations and professional advice before making financial or property decisions.