Longford Bridge and 10th Lock · Photo: Briankmc · CC BY-SA 4.0Castleknock has 14 buildings on the National Inventory
History in Castleknock goes back at least to 1790, the date of its oldest recorded building. Of its homes, 0.9% were built before 1919, against 3.4% in the typical town. Inside the town, the Sites and Monuments Record lists 1 archaeological site. For every 10,000 residents, Castleknock has 22 buildings on the record; the typical town has 48.
typical town: 48
Historic Castleknock: 2 photos, 1 old views
You can start with Longford Bridge and 10th Lock and 10th Lock. The photos cover 2 of Castleknock’s recorded places; the rest have a record card. From 1919 come the old photographs of Castleknock.
Photos from Wikimedia Commons, copied to our own server, each credited to its photographer with its licence; names open the place’s page. Tap a photo to step through them full screen.
Castleknock in old photos
1 old photograph, made before 1950.
1919From Wikimedia Commons, copied to our own server: public domain, or from the National Library of Ireland’s collections (Lawrence, Poole, Eason and others) with no known copyright restrictions. Each credit opens the image’s page.
Where Castleknock’s history is
Every building and site on the record inside the town, by its rating.
Hover a dot for its name; tap one to open its page.
The National Inventory of Architectural Heritage is the State’s survey of buildings from 1700 to today, county by county; each record gives a rating, dates, a type and an appraisal. Being on it is not legal protection: that is each council’s Record of Protected Structures.
Points from the National Inventory of Architectural Heritage and the Sites and Monuments Record, Department of Housing, Local Government and Heritage (CC BY 4.0).
14 historic places in Castleknock
Buildings rated Regional, of significance in their region, and archaeological monuments with an encyclopedia article.
All 12, A to Z
2 recorded by their type and address
2 are recorded only by their type and address: 2 homes; most date from the 19th century.
Castleknock’s largest group: homes, 64% of the record
The highest-rated include 10th Lock and Longford Bridge and 10th Lock. Second on the record: walls, gates and bridges, 2 of them. All of Castleknock’s recorded buildings carry a regional rating.
Types as the National Inventory records them, grouped; a building keeps the type it was built as.
Most of Castleknock’s dated buildings come from the 19th century
Each building by the first date on its record.
2 of the 14 dated ones were built before 1800. The oldest is 10th Lock, from 1790.
Archaeology in Castleknock
The Sites and Monuments Record lists every known archaeological site; most are field monuments with little to see. By kind:
1 archaeological site inside the town
Sites on the Record of Monuments and Places, the statutory list drawn from this record, are protected by law: anyone planning work at or near one must give the National Monuments Service two months’ notice.
| Burial ground1 record |
A growing town: 19% of Castleknock’s homes date from 2011 on, the norm is 5.8%
Look at when Castleknock’s homes went up and one period leads: from 1946 to 1980, with 31%. Building between the wars fell short in Castleknock: 1.1%, against 3.9% in most towns. At least one home in two in Castleknock was standing by 2001.
Census 2022, households by the year their home was built (CSO, Small Area Population Statistics, CC BY 4.0); the typical town is the middle Irish town of 2,500 or more.
3 notable people born in Castleknock before 1900
From Henry Burnell (1540) to Ernest Berdoe Wilkinson (1864): their lives on one timeline, earliest first.

Everyone born in Castleknock → Birthplaces from Wikidata, each checked against the person’s English Wikipedia article; portraits from Wikimedia Commons.
Castleknock and its neighbours
| Town | People | National Inventory | National | Archaeological sites |
|---|---|---|---|---|
| Castleknock | 6,355 | 14 | 0 | 1 |
| Ashtown | 14,937 | 13 | 0 | 3 |
| Carpenterstown | 20,967 | 71 | 2 | 17 |
| Blanchardstown | 24,613 | 12 | 2 | 15 |
| Finglas South | 12,475 | 2 | 0 | 10 |
| Chapelizod | 4,862 | 131 | 5 | 50 |
| Ballyfermot | 3,632 | 3 | 0 | 0 |
Castleknock in brief
The official list counts 14 places on the record in Castleknock. Most entries on the list, 64%, are homes. Of the 14 with a date, 12 come from the 19th century. The oldest is 10th Lock, from 1790.
John Wellington Gwynne (1814), Henry Burnell (1540) and Ernest Berdoe Wilkinson (1864) were all born here before 1900. Its homes are mostly newer: 0.9% were built before 1919, against 3.4% in the typical town. Otherwise the figures are ordinary: it has 14 recorded buildings, about typical for a town its size (the middle one has 37); per resident it sits near the middle of Irish towns of 2,500 or more; and it also has an archaeological site.
What this data can and can’t tell you
- The National Inventory. The State’s survey of post-1700 buildings, made county by county since 1990 (NIAH); a few records are older. It records; it does not protect.
- Ratings. International and National: of significance across Ireland or beyond. Regional: in its region. Local and record-only buildings get no page here.
- Archaeology. The Sites and Monuments Record (National Monuments Service) lists known archaeological sites; the national monuments to visit and the sites with an encyclopedia article get pages here.
- Protection. Both registers are surveys, not protection: a building is protected by its council’s Record of Protected Structures, and no national open list joins the 31 councils’ records.
- The grade. Ireland’s History grade is not built yet: the page describes, and gives no grade.
Questions about Castleknock’s history
How many historic buildings are recorded in Castleknock?
14 buildings on the National Inventory, from the National Inventory of Architectural Heritage.
What is the oldest building in Castleknock?
10th Lock: the first date on its record is 1790.
Are there archaeological sites in Castleknock?
Yes: the Sites and Monuments Record lists 1 archaeological site inside Castleknock.
How old are the homes in Castleknock?
0.9% of its homes were built before 1919, against 3.4% in the typical town.
Are the buildings on this page protected?
Being on the National Inventory or the Sites and Monuments Record is a record, not protection by itself: buildings are protected by their council’s Record of Protected Structures, which each council keeps and no national open list gathers, so this page can’t say which are on it.
This page describes its history; it gives no grade.
Source: National Inventory of Architectural Heritage and Sites and Monuments Record, Department of Housing, Local Government and Heritage (CC BY 4.0); Wikidata (CC0).
Sources: National Inventory of Architectural Heritage (buildingsofireland.ie) · Sites and Monuments Record and the National Monuments Service’s monuments to visit · CSO Census 2022 (homes by the year built) · Photos: Wikimedia Commons, including the National Library of Ireland’s collections, each credited with its licence and copied to our own server · Wikidata and English Wikipedia for people born here · Wikidata (CC0) for other names and articles. Under Creative Commons Attribution 4.0 (CC BY 4.0).
Contains Central Statistics Office (CSO) data, Census 2022, and Tailte Éireann boundaries (CSO Urban Areas, Small Areas, local electoral areas, constituencies), under Creative Commons Attribution 4.0 (CC BY 4.0).
