A few things:
You are not restricted to purchasing an annuity at retirement. You can transfer the fund to an ARF and continue to invest the money, so annuity rates may not be relevant.
To access your pension fund early, you must have left the company. If you intend to carry on working for them and want to purchase a property, you can ask them to set up a self administered pension plan for you. If it is a large company pension plan, it is unlikely that they will set up a completely separate plan for one or two employees.
It is extremely difficult to get a mortgage for a property through a pension. You will need blue chip tenants and even still, it is still difficult to get a loan. You can expect to get no more than 50% LTV. Another consideration is that the self admin plan will be in your employer's name for your benefit. If you default on the loan, they will be the ones getting the hassle. Do you think they will take that on?
With a relatively short investment term to retirement, you should be cautious about investing a large chunk of your money into commercial property. Property is an illiquid asset and when it falls, it can take a long time to recover.
Steven
http://www.bluewaterfp.ie (www.bluewaterfp.ie)