SQL - Conversion failed when converting the varchar value to data type int

Hello, i'm trying to build an MS SQL query, like so -

Select
('/job-search.asp?s=' + JBCID) AS URLOne,
('/job-search.asp?s=' + JBCID + '&' + JBCategoryLabel + '-jobs-in=XXXXX') AS URLTwo,
('/job-search/s-' + JBCID + '/' + JBCategoryLabel + '-jobs-in=XXXXX') AS URLThree,
('/' + JBCategoryLabel + '-jobs-in=XXXXX') AS URLFour
from dbo.JBCategories C Inner Join dbo.JBSite S on C.JBCSiteID = S.JBSSiteID
where JBCSiteID = 30

However when i run the query I get the following error -

Msg 245, Level 16, State 1, Line 1
Conversion failed when converting the varchar value '/job-search.asp?s=' to data type int.

Please advise what i have done wrong? Many thanks