WEALTH May 21, 2026 0 Comments

Why Deep Retrofit is the Office Market’s Next Goldmine—and How Early Investors Can Cash In Before Everyone Else Does

Ever wondered if you could snag almost 90% of the rental returns of a full redevelopment—while only coughing up a third of the cash? Sounds like a dream, right? Well, deep retrofit is proving to be that game-changer in Dublin’s office market, shaking up the traditional rebuild-versus-renovate debate. According to Ireland’s Deep Retrofit Report 2026, this approach isn’t just about ticking sustainability boxes anymore; it’s morphing into a sharp strategy for capital efficiency and quicker cash flow. Imagine turning an aging office into a shiny A3-grade asset within two years, roping in steady rent, all while your peer is still sweating over a five-year redevelopment project. With Dublin’s office buildings aging and new supply drying up until at least 2027, retrofit offers a tantalizing shortcut that blends economic savvy with ESG demands. It’s a fresh lens on property investment, and if you’re in the game, it’s time to take notice—because why wait longer and pay more when there’s a smarter, faster play? LEARN MORE

Deep retrofit is emerging as one of the most commercially viable strategies in Dublin’s office market, with building owners potentially able to secure up to 90 per cent of redevelopment rental performance at roughly one-third of the cost, according to a new industry report.

The findings are contained in Ireland’s Deep Retrofit Report 2026, published by Buildcost Chartered Quantity Surveyors and launched at a joint industry briefing hosted alongside commercial property consultants Bannon and sustainability consultants Evia.

The event was attended by developers, investors and commercial property advisers.

The report argues that “time to income” is becoming one of the key commercial drivers in Dublin’s office market as rising construction costs, tighter access to capital and increasingly stringent ESG requirements reshape investment decisions.

A central case study compared the economics of deep retrofit against full redevelopment for a prime Dublin office asset.

According to the analysis, a deep retrofit costing approximately €15m could deliver an A3-rated office building within two years and generate annual rental income of about €3m upon completion.

In contrast, a comparable redevelopment project would require investment of around €44m and a five-year delivery timeline before any rental income could be realised.

The report also found that the retrofitted building could generate more than €10m in rental income during the period in which a redevelopment scheme would still be under construction.

The findings come as Dublin’s office sector faces mounting pressure to modernise ageing stock amid tighter environmental standards and constrained new supply.

Buildcost estimates that more than 1,000 office buildings across Dublin are now more than a decade old, representing over 33 million sq ft of office space.

At the same time, only 3 per cent of Irish office buildings are currently A-rated. With limited new office completions expected before 2027 or 2028, the report suggests retrofit may offer the quickest route to repositioning assets to meet occupier demand.

Speaking at the launch, Liam Langan, Director at Buildcost, said: “The commercial conversation around retrofit has changed significantly over the last 18 months. This is no longer just simply about sustainability or compliance; it is increasingly about capital efficiency, speed to market and protecting asset value.

“What we are seeing is that owners may be able to achieve most of the rental and investment performance of redevelopment at a dramatically lower capital cost and within a much shorter timeframe.

“In many cases, retrofit allows owners to get buildings back to market and back to income earlier, while also avoiding a significant portion of the development risk associated with demolition and redevelopment.”

Neil Bannon, Executive Chairman at Bannon & Evia, added: “Occupiers want quality, sustainability and amenity, while investors are increasingly focused on resilience and future proofing.

Deep retrofit — The report found that the retrofitted building could generate more than €10m in rental income during the period in which a redevelopment scheme would still be under construction.

“At the same time, there is very limited new supply coming to market over the next number of years.

“This combination is creating a major opportunity for owners willing to reposition existing assets through retrofit.

“What this analysis demonstrates is that retrofit can often deliver a very similar income profile at a significantly lower cost and with a much faster route back to revenue generation.”