Meanwhile, Limerick city semi-Ds have seen their prices frozen at €200,000, with zero inflation over the previous three months.
In contrast, strong increases in prices were experienced in locations where city commuters are now tending to head in search of affordable homes which are within their mortgage range.
Cork County had some of the strongest increases nationwide in three months with homes up 4.7pc in the quarter while Galway County saw a 3.2pc rise.
Limerick County prices soared by 6.7pc, the second highest in the country and a startling increase of more than 2pc per month.
Commuter locations where mid to low-earning Dubliners are heading to find affordable homes also showed inflationary spikes.
In Laois, a county in which agents are reporting big interest from Dubliners, prices rose by 5.4pc in just three months to €195,000.
This shows that many city dwellers, fearful of surging rents and the insecurities of tenancy, are opting instead for ownership with long-distance commutes attached.
The Real Estate Alliance bases its data on actual sales, as opposed to asking prices, of three-bed semis, the country's most common home type.
"There is no doubt that the Central Bank [mortgage lending] rules are having an effect in the market, and are achieving what they set out to do in terms of keeping a lid on prices," said REA spokesperson Barry McDonald.
"In the Celtic Tiger years, all prices rose across the board, but in 2018 the system is actually working and the only price inflation is in a new homes market that is concentrated in pockets."
There has been a 3pc reduction in cash buyers in the market in the past three months, with mortgage-approved house hunters now making up 78pc of purchasers.
This trend further increases the effect of the Central Bank rules on the market.
"The second-hand market has become extremely price- sensitive, not just in Dublin, and when we look across the country it is the areas with quality housing stock available for under €270,000 that are achieving highest growth," added Mr McDonald.
The average semi-detached house nationally now costs €234,824 - a rise of 1pc on €232,441 three months ago.
A warm summer also played a cooling role in the market, according to Limerick agent Michael O'Connor.
He said: "September appears to be the month when we caught up on lost time.
"Once the kids returned to school, the market accelerated with a noticeable increase in transactions."
The highest rate of increase in the country overall was experienced in Carrigallen in Leitrim.
Leitrim prices were up 7.5pc, making it the fastest-inflating county.
Source: Irish Independent