If you have special needs to ensure a home will be suitable for a home swap, include details within your home exchange offer description and also in messages when contacting Home Base Holidays members to suggest a swap.
You can limit the results of a search for suitable homes in a number of ways; search home swap offers (see particularly the tick box choices under ‘Additional options’); but, if your needs aren’t covered (perhaps you are very tall and need a king-size bed*, or a family member has an allergy to cat hair and can’t stay in a home even if the usual resident cat is being looked after elsewhere).
As long as you don’t overly restrict your exchange offer (as you might come across as a ‘difficult’ person and put off members from suggesting a swap!), it is very useful to include vital requirements in your offer as this will help avoid sending/receiving exchange offers that won’t be suitable.
*This photo, from an apartment overlooking the widest canal in Amsterdam, is labelled, 'master bedroom with king size bed - can become two singles' (very useful information for tall people looking for a home swap!). View this home swap offer in Amsterdam.