| G05, Sigma House Narrow Lane, Northampton, NN1 2JY | Dec 2023 | £125,000 | Flat / maisonette | Leasehold |
| Flat 101, Sigma House Narrow Lane, Northampton, NN1 2JY | Nov 2023 | £121,000 | Flat / maisonette | Leasehold |
| Flat 203, Sigma House Narrow Lane, Northampton, NN1 2JY | Jul 2022 | £132,000 | Flat / maisonette | Leasehold |
| Flat G4, Sigma House Narrow Lane, Northampton, NN1 2JY | Jun 2022 | £130,000 | Flat / maisonette | Leasehold |
| Flat 302, Sigma House Narrow Lane, Northampton, NN1 2JY | Feb 2022 | £120,000 | Flat / maisonette | Leasehold |
| Flat 105, Sigma House Narrow Lane, Northampton, NN1 2JY | Aug 2019 | £115,000 | Flat / maisonette | Leasehold |
| Flat G3, Sigma House Narrow Lane, Northampton, NN1 2JY | Aug 2017 | £91,000 | Flat / maisonette | Leasehold |
| Flat 204, Sigma House Narrow Lane, Northampton, NN1 2JY | Jun 2017 | £120,000 | Flat / maisonette | Leasehold |
| Flat 303, Sigma House Narrow Lane, Northampton, NN1 2JY | Nov 2016 | £115,000 | Flat / maisonette | Leasehold |
| Flat G1, Sigma House Narrow Lane, Northampton, NN1 2JY | Sep 2016 | £135,000 | Flat / maisonette | Leasehold |
| Flat 202, Sigma House Narrow Lane, Northampton, NN1 2JY | Mar 2016 | £125,000 | Flat / maisonette | Leasehold |
| Flat G2, Sigma House Narrow Lane, Northampton, NN1 2JY | Mar 2016 | £132,000 | Flat / maisonette | Leasehold |
| Flat 201, Sigma House Narrow Lane, Northampton, NN1 2JY | Oct 2015 | £107,500 | Flat / maisonette | Leasehold |
| Flat 301, Sigma House Narrow Lane, Northampton, NN1 2JY | Dec 2014 | £106,000 | Flat / maisonette | Leasehold |
| Flat 102, Sigma House Narrow Lane, Northampton, NN1 2JY | Jul 2007 | £151,952 | Flat / maisonette | Leasehold |
| Flat 104, Sigma House Narrow Lane, Northampton, NN1 2JY | Jun 2007 | £158,995 | Flat / maisonette | Leasehold |
| Flat 103, Sigma House Narrow Lane, Northampton, NN1 2JY | Jun 2007 | £140,602 | Flat / maisonette | Leasehold |
| 105, Sigma House Narrow Lane, Northampton, NN1 2JY | Jun 2007 | £132,500 | Flat / maisonette | Leasehold |
| Flat 205, Sigma House Narrow Lane, Northampton, NN1 2JY | Jun 2007 | £155,995 | Flat / maisonette | Leasehold |