The Cottage, Carpenterstown Road, Castleknock, Dublin 15, Castleknock, Dublin 15, D15 YYH9
20 homes sold nearby. See what they went for — and what to bid on this one.
€645,000 · 3 Bed · 1 Bath · 105m² · Detached
Market Position
Below Typical Sale Prices
At €645,000, this home is priced below what similar properties sold for in the area. That's a favourable starting position — but consider a structural survey before committing.
20 closed sales nearby · 9mo recency · High confidence · Property Price Register
Sources: PPR, SEAI, OPW, planning records.
How this is calculated
We search the Property Price Register for closed sales near this property — matching by location, beds, property type, and where available, floor area (±20%). This gives us a set of genuinely comparable transactions.
Each sale is then time-adjusted to today using local price trends, so a sale from 18 months ago is inflated (or deflated) to reflect current market conditions. Where floor area is known, sales are also size-adjusted — a 90m² sale is normalised to what it would have sold for at this property's size. This means the figures you see aren't raw prices — they're what those same homes would likely sell for today, at this size.
Your bid strategy (opening offer, sealed bid range, walk-away ceiling) is then derived from the statistical distribution of these adjusted sales — with conservative safety margins applied when data is thin or dated.
Every figure comes from actual government-recorded sale prices. No asking prices, no agent estimates, no automated valuations.
Full methodology →Opening
Start here
Best & Final
If multiple offers
Ceiling
Do not exceed
Before you bid €645,000, get your opening offer, best-and-final range, and walk-away ceiling.
Instant access · No subscription · Refund if not useful
Overbidding by 5% could cost €32,250 before interest.
Analysing 625,000+ Property Price Register transactions since 2010.
What your report includes
Before You Bid
Before you bid €645,000, see this.
Here is what the data says about this property.
Will This Go Over Asking?
above asking
Probability of a sale above asking based on local bidding patterns.
Am I Overpaying?
local sales
Where the asking price sits in the verified local transaction distribution.
Negotiation Leverage Score
How much negotiation leverage you have based on market conditions.
These signals interact — full analysis in report.
€32,250
That's what overbidding by just 5% on a €645,000 home costs you — before interest.
A €19 check before a €645,000 commitment.
Get Your Exact Bid Numbers for This Property
You've seen the market signals. Now get the exact numbers: where to open, how far to go, and when to walk away.
Built from 625,000+ verified Irish property transactions
Based on 20 verified local sales · High confidence
Instant access · No subscription · Refund if not useful
Price Distribution Analysis
20 verified closed sales within 1.5km · 18 months. Size-adjusted for similar homes (type match, beds ±1, size ±20%).
Asking price is positioned below the median of comparable sales, suggesting favourable entry conditions. Median anchored to size-similar transactions.
This chart shows where the asking price sits versus recent verified closed sales. It does not show your bid strategy.Same baseline as Market Position — size-adjusted.
The chart shows the market. Your report gives the number not to exceed.
Instant access · No subscription · Refund if not useful
Local Market Momentum
Unlock to adjust radius, timespan, and comparison window.
Radius: 1.5kmTime: 18m12m vs 12mMedian transaction price per m² has increased 3.5% year-on-year, based on the trailing 18-month transaction window.
Indicates sustained upward pricing pressure in the local market.
Recent closed sales are time-adjusted to current market conditions before calculating transaction bands.
Statistical Confidence · High
20
Transactions Analysed
Within 1.5km
9 months
Data Freshness
Most recent sale age
±20%
Price Spread
How much prices vary
High
Confidence Level
Recent sale prices in this area are closely clustered, which means the data is reliable and the bid strategy is well-supported.
High data density supports precise entry positioning.
PPR closed sales · size & time adjusted · no asking prices used
Supporting Evidence · 20 Transactions
Size and time adjustments applied before percentile computation.
| Address | Sold | Date | Size |
|---|---|---|---|
| Glen House, Strawberry Beds, Chapelizod, Dublin 20, Dublin | 2026-01-14 | 294m² | |
| 5a Castleknock Grange, Castleknock, Dublin 15, Dublin 15, Dublin | 2025-02-17 | 125m² |
Transactions within a 1.5km radius and 18-month window.
Methodology
Closed sales time-adjusted to current market · size-weighted where floor area available · no asking prices or agent estimates used.
How adjustments work
- —Older sales inflated to current market level so stale data doesn't skew bands
- —Similar-sized properties weighted more heavily where floor area is known
- —Local price trends factored in when sufficient data exists; no artificial uplift otherwise
- —All figures from registered closed sales only — no asking prices, no agent estimates
Local Market Notes
Property Quality
Significant BER Upgrade Opportunity: The current F BER rating necessitates substantial investment; upgrading to a C2 BER could cost €10,000-€15,000 and potentially increase property value by €20,000-€25,000.
Size Advantage: At 105.0m², the property is of a respectable size, but the market within 1km shows a median sale price for similar detached properties at €1,462,500 for 6 sales over 180 days, suggesting this property's size may be below the premium end of the detached market in this specific micro-location.
Value Optimization Needed: The F BER rating contributes to an estimated €2,200-€2,800 annual energy cost, compared to €1,000-€1,400 for a C2-rated property of similar size, representing a significant financial drain that reduces overall value.
Hypothesis: The current F BER rating is a significant valuation drag, and the cost of upgrading it, while offering a return on investment, may not fully bridge the gap to the higher-priced detached properties sold locally, suggesting the property's core quality needs further enhancement beyond BER improvements to command a premium.
Amenities
Excellent Transport Links: The location is well-served by Dublin Bus routes 25, 25A, 66, 66A, 66B, and 66X, with the train station at Castleknock providing access to central Dublin.
Local Education Hub: Proximity to reputable schools such as St. Brigid's National School, St. Patrick's National School, and Luttrellstown Community College offers strong family appeal.
Retail and Leisure Access: Nearby amenities include the Blanchardstown Shopping Centre and a variety of local shops and restaurants in Castleknock village, alongside the vast green space of Phoenix Park within a short drive.
Hypothesis: The strong educational infrastructure and access to major retail and leisure facilities, combined with multiple direct transport links to the city centre, significantly enhance the property's appeal and long-term value, potentially justifying a higher price point if the property itself is renovated to a modern standard.
Derived from nearby closed-sale patterns.
Built on verified Irish public data
Property Price Register
625,000+ verified closed sales
SEAI
Building energy ratings & floor area
Office of Public Works
Flood zones, events & study areas
MyPlan.ie
Planning applications nationwide
Common Questions
Bid strategy figures are derived from the Property Price Register — Ireland's official record of closed residential sale prices, verified through stamp duty. Floor area data comes from the SEAI BER register. Flood exposure is cross-referenced against OPW flood extent mapping (CFRAM fluvial + NCFHM coastal) and historical flood events. Planning activity is sourced from the National Planning Application Database via MyPlan.ie — merged Local Authority planning registers from the Department of Housing. No asking prices, no agent estimates, no automated valuations.