Dún Laoghaire-Rathdown Yields 7.1%, but Tax Takes Over Half

Estimates for a typical 3-bedroom house. Short-term letting is not available to investors in this market.

At 7.1% gross, Dún Laoghaire-Rathdown delivers a respectable headline yield for a premium Dublin suburb. The real question is how much survives after Ireland's heavy tax burden and operating costs.

Investors Cannot Legally Short-Term Let in Dún Laoghaire-Rathdown

Ireland's entire territory is designated a Rent Pressure Zone since June 2025. Under RPZ rules, short-term letting of an entire property requires that it be the owner's principal private residence. For an investor who does not live in the property, short-term letting on platforms like Airbnb is not a legal option.

Owner-occupiers may still let their principal residence for up to 90 nights per year without planning permission. From 20 May 2026, all hosts must register on the Fáilte Ireland Short-Term Letting Register, with free registration, annual renewal, and a compliance declaration required. Platforms must display registration numbers on every listing. But none of this applies to buy-to-let investors, who are limited to long-term letting only.

This is not unique to Dún Laoghaire-Rathdown. Every county in Ireland faces the same restriction. There are no "more permissive" Irish alternatives to consider. The investment question in this market is straightforward: does long-term letting generate a worthwhile return?

Suburb Yields Range from 6% to 8.8% Across 70 areas

The county-wide average of 7.1% masks significant variation across Dún Laoghaire-Rathdown's 70 electoral divisions. Rents are relatively uniform across the county at approximately €3,775 per month for a 3-bedroom house, so the yield spread is driven almost entirely by sale prices. The cheapest areas deliver nearly 50% more yield than the priciest.

Cabinteely-Kilbogget and Cabinteely-Loughlinstown top the list because their entry prices sit well below the county average while commanding the same rents. Meanwhile, areas like Blackrock-Monkstown and Dundrum-Sweetmount carry premium price tags above €680,000 that compress yields below 7%. The pattern is clear: in a county with flat rents, the investor's return is determined almost entirely by purchase price.

These are averages per electoral division. The dashboard breaks it down further, by bedroom count and property type, so you can model your specific property.

Operating Costs Reduce the 7.1% Gross to Roughly 4% Net

Gross yield tells only part of the story. A long-term letting investor in Dún Laoghaire-Rathdown faces several recurring costs that chip away at the €45,300 in annual rent:

• Property management: At the standard 8% rate, roughly €3,624 per year
• Landlord insurance: Approximately €1,064 per year
• Maintenance and repairs: Estimated at around €6,620 annually for a property of this value
• Local Property Tax (LPT): At 0.1%, approximately €490 per year

These operating costs total roughly €11,800 per year, reducing annual net operating income to approximately €33,500. That brings the net operating yield down to around 5.3% before income tax. Landlords do not pay utilities or furnishing costs for long-term lettings, which is a meaningful saving compared to short-term letting (where it would be permitted).

RTB registration and compliance costs are minimal but required. All tenancies must be registered with the Residential Tenancies Board, and landlords must comply with minimum standards regulations for rental properties.

After Tax, Dún Laoghaire-Rathdown Investors Keep Under Half

Ireland's tax treatment of rental income is among the most aggressive in Europe. Rental income is taxed at the investor's marginal rate, which for most property investors means:

• Income tax: 40% (higher rate, applying to most investors with other income)
• USC: Up to 8%
• PRSI: 4%
• Effective top rate: Approximately 52% on rental income

On roughly €33,500 in net operating income, an investor at the top marginal rate would retain approximately €16,100 after tax. That reduces the after-tax yield to around 2.5% on a property worth €636,582.

There is one significant offset: 100% of mortgage interest is deductible against rental income for residential lettings. For a highly leveraged investor, this deduction substantially reduces the taxable amount. An investor with an 80% LTV mortgage at 4% would deduct roughly €20,400 in interest, leaving only about €13,100 in taxable rental income. The tax bill drops, but so does the cash return after debt service.

Pre-letting expenses are deductible up to €10,000 for properties that have been vacant for more than 12 months, which can ease the first-year tax burden for investors bringing long-vacant properties back to market.

Capital gains tax sits at 33% on disposal. For investors betting on appreciation in this premium market, that is the eventual exit cost to factor in.

RPZ Rent Caps Limit Future Growth to 2% Per Year

The Rent Pressure Zone designation does not just ban investor short-term letting. It also caps rent increases on existing tenancies to 2% per year (or the Harmonised Index of Consumer Prices rate, whichever is lower). For an investor entering at €3,775 per month, this means annual rent growth is capped at roughly €75 per month even if market rents rise faster.

This cap applies between tenancies as well, not just within them. When setting rent for a new tenant, the landlord cannot exceed the previous rent plus 2% per year for the time elapsed. In a market where property prices have historically appreciated faster than 2% annually, this creates a growing gap between achievable rent and the theoretical market rate.

For yield-focused investors, the RPZ cap means the 7.1% gross yield is close to a ceiling, not a floor. Real yield improvement will come from buying below market value, not from future rent growth.

Dún Laoghaire-Rathdown Commands a Premium over Regional and National Averages

Comparison of key investment metrics.

Dún Laoghaire-Rathdown's property prices are roughly 70% above the Eastern and Midland regional average and more than double the national average. Rents are proportionally higher too, but not enough to keep pace with prices. The result: gross yields trail both the regional and national averages.

This is the classic premium market trade-off. Investors pay more per euro of rent, accepting lower yield in exchange for perceived lower risk, stronger tenant demand, and the potential for capital appreciation in one of Dublin's most established residential areas. South Dublin faces similar yield compression in neighbouring counties.

For investors prioritising yield over location prestige, areas outside Dublin's premium belt offer meaningfully higher returns. But those markets typically come with weaker tenant demand, longer void periods, and less liquidity on resale. The market score methodology accounts for these trade-offs.

Investment Bottom Line: A Premium Bet on Appreciation, Not Cash Flow

Dún Laoghaire-Rathdown is not a cash flow market. After operating costs and Ireland's approximately 52% effective tax rate on rental income, the after-tax yield lands around 2.5%. An investor with a mortgage will see even less cash in hand, despite the interest deduction reducing their tax bill.

The case for investing here rests on three pillars: consistently strong tenant demand in a supply-constrained market, long-term capital appreciation in one of Ireland's most desirable residential areas, and the relative safety of a premium location with deep liquidity. The 7.1% gross yield is the entry ticket; appreciation is the real play.

Within the county, buying smartly matters enormously. The spread between Cabinteely-Kilbogget at 8.8% and the priciest electoral divisions at around 6% represents nearly 50% more income on the same rent. Explore the full breakdown by suburb in the dashboard.

Data reflects market conditions as of March 2026. Stamp duty and transaction costs apply on purchase; these are complex and banded, so check current rates with your solicitor before committing. Listings can be monitored on Daft.ie and MyHome.ie for current asking prices and rental comparables.

This information is for educational purposes only and should not be considered financial or legal advice. Regulations and market conditions change frequently. Verify current rules with local authorities before making investment decisions.