A Victorian pair, probably built c.1860 (cf. these comments on no. 18, a detached house in very similar style: "The land at 18 Old North Road was purchased in the late 1850’s for £36.00 by a collective of 11 local trades people including schoolmasters, builders, grocers and chemists, and a charity commission was established to the benefit of the Kneesworth Street Congregational Church. Building started 1st March 1860": www.rightmove.co.uk/property-for-sale/property-46294499.html ). Definitely in existence by 1887 as they appear on the large scale Ordnance Survey map published in that year but the lack of horns on the sashes of no.14 and the "Georgian survival" style help to confirm the earlier date.