  Compact Steep Spectrum (CSS) radio sources are active galactic nuclei that
have radio jets propagating only on galactic scales, defined as having
projected linear sizes (LS) of up to $20\,$kpc. CSS sources are generally
hosted by massive early-type galaxies with little on-going star formation,
however a small fraction are known to have enhanced star formation. Using
archival data from the Faint Images of the Radio Sky at Twenty cm survey, the
Very Large Array Sky Survey and the Sloan Digital Sky Survey we identify a
volume-limited sample of $166$ CSS sources at $z<0.2$ with
$L_{1.4\,\text{GHz}}>10^{24}\,\text{W}\,\text{Hz}^{-1}$. Comparing the star
formation rates and linear sizes of these CSS sources, we find that the
$\approx14\,\%$ of CSS sources with specific star formation rates above
$0.01\,\text{Gyr}^{-1}$ all have $\text{LS}<10\,$kpc. We discuss the possible
mechanisms driving this result, concluding that it is likely the excess star
formation in these sources occurred in multiple bursts and ceased prior to the
AGN jet being triggered.
