Estate Agent Intelligence
NI Rank
#130of 194
Median days
89days
Listings analysed
57
Based on data from May 2026 – November 2026 · independently observed by ClearKey
This page summarises independently observed market activity for Simon Brien (North Belfast). Based on ClearKey's analysis of 57 qualifying transactions in May 2026 – November 2026, Simon Brien (North Belfast)'s listed properties moved from listing to sale agreed in a median of 89 days. This is 8 days slower than the Northern Ireland median of 81 days across all qualifying agents for the same period. Simon Brien (North Belfast) ranks 130 of 194 agents with sufficient qualifying transactions to appear in ClearKey's dataset.
Within the dataset, Simon Brien (North Belfast) ranks fastest in the BT15 postcode district.
Speed to sale agreed is one indicator of performance, not a comprehensive measure of service quality. It does not capture price achieved relative to asking price, fall-through rates, or quality of buyer qualification.
Median days
89d
Primary metric
Average days
87d
Mean
Transactions
57
0.9% market share
NI rank
#130
of 194 agents
Speed comparison
Postcode districts covered
★ Indicates district where this agent ranks #1 for speed
Detached
Medium83days
Semi-detached
Medium94days
Terraced
Medium71days
Under £150k
Medium62days
£150k – £250k
High90days
£250k – £400k
Medium101days
BT14
Medium96days
BT15
High90days
BT36
Medium89days
Observations generated from ClearKey's dataset. All statements are derived from measured data — no subjective assessments.
Selling time broadly in line with the Northern Ireland average
This agent's median of 89 days places them close to the Northern Ireland median of 81 days. This suggests performance consistent with typical market conditions during this period.
Fastest agent in the BT15 area
In the BT15 postcode district, this agent ranked first with a median of 90 days — 1 days faster than the local median of 91 days.
Wide variation in selling times — 59 to 117 days for the middle 50%
The middle 50% of this agent's listings sold in 59 to 117 days — a spread of 58 days. This breadth suggests the agent handles a diverse portfolio where individual property characteristics have a significant effect on how long each takes to sell.
Terraced sold 23 days faster than Semi-detached on average
This agent's Terraced listings reached sale agreed in a median of 71 days, compared with 94 days for Semi-detached. Property type has a meaningful effect on how quickly this agent's listings sell.
Ranking supported by a substantial transaction sample
With 57 qualifying transactions in this period, this agent's ranking is in the high-confidence bracket. A larger dataset makes the median more robust to individual outliers.
Days on market is calculated from the property's listing date to the date it moved to sale-agreed or likely-sold status — not to legal completion.
Median is used as the primary ranking metric rather than average — it is more robust when individual portfolios contain outlier properties that take unusually long to sell.
Only agents with a minimum of 10 qualifying sale-agreed transactions in the analysis period appear in the main ranking. Segmented breakdowns (property type, price band, region) use an adaptive minimum between 3 and 10 transactions, scaled to the total activity in that segment — this prevents niche segments from showing almost no ranked agents.
Properties with a days-on-market figure exceeding 1,095 days (3 years) are excluded as likely data anomalies.
All data derived from ClearKey's verified Northern Ireland property listings database. Rankings are computed independently and cannot be influenced by estate agents.
Speed is not the same as price achieved. This page measures how quickly listed properties moved to sale agreed — not whether they achieved asking price, above, or below.
Area effects. Agents operating in postcodes with naturally faster market velocity will tend to rank higher regardless of individual firm performance.
Property mix. Agents handling premium, rural, or specialist stock that takes structurally longer to sell may rank lower without any reflection on service quality or client outcomes.
Name fragmentation. The same firm may appear under slightly different name variants in listing data, which can split their transaction count and affect ranking.
View the full NI ranking and compare Simon Brien (North Belfast)side-by-side with other agents in ClearKey's Estate Agent Speed reports.
Data covers May 2026 – November 2026 · Published by ClearKey · Independently observed