How many letters does the top answer for “home of burghley house” have?

The most common answer is barnack (7 letters).

Crossword clue: home of burghley house

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

barnack 7 letters wd-fact-v3

stmartinswithout 16 letters wd-fact-v3

home of abbasi house 50% similar → kashancounty

home of apsley house 50% similar → cityofwestminster

home of banqueting house 50% similar → cityofwestminster

home of blue house 50% similar → jongnodistrict

home of borujerdi house 50% similar → kashancounty

home of burlington house 50% similar → cityofwestminster

home of chinese house 50% similar → brandenburgervorstadt

home of clarence house 50% similar → cityofwestminster