There were 74,000 completed sales during the month, up from 63,000 the previous month, the figures show.
The pick-up could also be a sign that some buyers brought forward purchases to benefit from the stamp duty concession, which has now expired.
Mortgage lending also spiked in March, figures showed on Monday.
Gross mortgage lending stood at £13.
4bn in March, up 30% on February, the Council of Mortgage Lenders (CML) said.
Subdued activity Sales figures have increased sharply in March compared with February in each of the past three years.
The warm weather at the start of the year may have encouraged some potential buyers to go house-hunting.
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