First: win the map
For local searches like 'accountant sheffield' or 'pizza kelham island', the map pack gets the clicks. Complete every field of your Google Business Profile, choose categories precisely, add photos that look like your actual premises, and reply to reviews. This is free and most of your competitors do it badly.
Second: ask for reviews like you mean it
Reviews are a ranking factor and a conversion factor at once. Build the ask into how you finish jobs: a text with a direct link beats a hopeful sign by the till. A steady trickle beats a suspicious burst of five-star reviews every January.
Third: one page per service, one per place
A single 'services' page listing ten things ranks for none of them. Give each real service its own page written in plain English, with prices if you dare. If you serve Rotherham, Chesterfield or Barnsley too, say so on pages that actually mention them.
Fourth: speed and boring health
A site that loads in under two seconds on a phone, with titles that say what each page is, beats clever tricks. Technical SEO for a local business is mostly hygiene. Anyone selling you monthly 'authority building' before the basics are done is selling dessert before dinner.