Question: If I were to let my property out above the rent-a-room allowance threshold and so expose myself to a stamp duty clawback (whether by staying where I am and increasing the rent, or by moving back to parent's house and letting the property in its entirety), would I, in essence be doing as above and making myself eligible for the first time buyer's stamp duty discount i.e. zero (assuming the next property I buy becomes my ppr for the following 2 years and I only let out spare rooms under the rent-a-room thresholds)?