This should be done at least twice yearly but is very dependent on the environment in which the piano is kept. If your piano is housed in a stable environment, it is likely to stay in tune far longer. A good tuner is worth their weight in gold; it is rare to find someone who is able to tune quickly and accurately in addition to laying a solid tuning that withstands the rigours of intense performance, competitions and recordings etc. Concert tuning is usually undertaken before each performance, likewise with recordings.
Area covered for tunings: London and South East England only
A minor service is usually required once a year (tweaking of action regulation, refining voicing and cleaning inside and out). A full service can take one to two days, depending on the extent of work needed; this usually involves re-shaping the hammers to restore them to their correct shape for best tone as well as action regulation, dry lubrication of friction points, voicing the piano, cleaning the piano and tuning.
Areas covered for servicing: London, South of England and Midlands
This can be anything from fitting a new set of hammers (and associated work) to full restoration of your piano. More detail on this can be seen in the other pages of this site.
Areas covered for restoration: Whole of UK and Europe
Custom made / bespoke piano music desks
Preparing for re-stringing!