A shared ownership valuation example is often the bit that turns an exciting staircasing plan into a small spreadsheet-induced wobble. You may know you want to buy a bigger slice of your home, but the number that matters is not simply what you paid a few years ago, nor what a neighbour claims their place sold for over a garden fence. It is the current market value of the whole property, assessed properly.
For buyers and owners, a RICS valuation provides an independent figure to use when buying further shares in a shared ownership home. It gives you, your landlord and usually your lender a credible basis for the transaction. Less guesswork, fewer raised eyebrows, and a much clearer sense of whether the sums stack up.
What a shared ownership valuation actually measures
When you staircase, the valuer normally assesses the market value of 100% of the property, not just the share you already own. The price of the additional share is then calculated as a percentage of that full market value.
The valuation reflects what the property could reasonably achieve on the open market at the valuation date, usually assuming vacant possession. A RICS Registered Valuer will consider recent comparable sales, the property’s size, condition, layout, location and any features that affect demand. A bright kitchen extension can help. A lease with a short term remaining can be less charming.
This is distinct from a mortgage valuation, which is carried out for a lender’s security purposes, and from an estate agent’s appraisal, which may be useful market colour but is not normally acceptable for staircasing. Think of the RICS valuation as the grown-up document in the room – precise, evidence-led and rather less interested in flattering anyone.
A shared ownership valuation example
Imagine you own a 25% share of a two-bedroom flat. You would like to buy another 25%, taking your ownership to 50%.
A RICS Registered Valuer inspects the flat and reviews comparable sales of similar homes nearby. They assess the full market value at £400,000.
Your additional share is calculated like this:
£400,000 × 25% = £100,000
So, before transaction costs, you would pay £100,000 to buy the extra 25%. You would then own a 50% share worth £200,000 at that valuation date, while the housing provider retains the remaining 50%.
The result may feel straightforward, but the full valuation can move the number more than people expect. If the flat had been valued at £380,000, the same additional 25% would cost £95,000. If it was valued at £425,000, it would cost £106,250. A difference of a few percentage points in the whole-property figure is very real money when you are buying a quarter of a London home.
Your rent should reduce because you are renting a smaller unsold share. However, the exact rent, review arrangements and service charge position depend on your lease and housing provider. Do not assume every outgoing changes in neat proportion. Service charges, for instance, may carry on doing their own thing, as service charges often do.
What if you are buying 10% rather than 25%?
The principle is identical. Say the full market value is £350,000 and your lease allows you to buy a further 10%:
£350,000 × 10% = £35,000
You would pay £35,000 for that extra share, plus the relevant fees and costs. Many modern shared ownership leases permit smaller staircasing increments, but the terms vary. Read the lease and the provider’s staircasing guidance before arranging finance around a figure that may not be available to you.
How the valuer reaches the figure
A reliable valuation is not a calculator trick. The valuer will inspect the home and compare it with recent, relevant local evidence. In South East London, two flats on the same road can command noticeably different prices because one has a proper second bedroom, a usable outside space, a long lease or simply less traffic rumbling past the front door.
The valuer will typically look at the accommodation, overall condition, construction, tenure, lease length, parking, communal areas and location. They will also consider sold prices for comparable properties, adjusting for meaningful differences rather than treating every nearby sale as a perfect match.
If you have carried out improvements, raise this early. Whether those improvements are included in the staircasing valuation can depend on the terms of your lease and the housing provider’s requirements. Some leases require qualifying improvements to be disregarded, so that you are not asked to buy back a share of value you created yourself. Others deal with the issue differently. It is a detail worth getting right before assumptions become expensive.
The figure is only valid for a limited time
Housing providers commonly require a valuation to be current for a defined period, often three months, although their individual policy controls. This is why timing matters. If your mortgage offer, solicitor or provider approval takes longer than expected, you may need an extension or a new valuation.
That can be frustrating, particularly in a moving market, but it protects all parties from relying on an old figure. Ask the housing provider what format it requires, how long it will accept the report for and whether it has a panel or specific instruction wording. Sorting this before booking avoids the property equivalent of turning up to a gig with the wrong ticket.
Costs to budget for alongside the new share
The share price is the headline number, but it is not the whole bill. Your budget may also need to cover the valuation fee, your solicitor’s costs, the housing provider’s administration fee, mortgage-related charges and Land Registry fees. Stamp Duty Land Tax can also be relevant, depending on how you elected to pay it when you bought and the terms of the current transaction.
The tax position in shared ownership can be technical, especially where an earlier election was made or where staircasing takes ownership above a particular threshold. A solicitor or tax adviser can advise on your circumstances. A valuer can establish market value; they should not be expected to moonlight as your tax planner.
Before committing, ask for a written estimate of all third-party costs and check the lender’s requirements. If you are remortgaging to fund the purchase, leave enough time for underwriting and legal work. The valuation amount may be fixed for a short window, but conveyancing rarely shares that sense of urgency.
Choosing the right valuation for staircasing
Your housing provider will usually require an independent valuation from a RICS Registered Valuer. It may specify that the report must be addressed to particular parties, confirm the purpose of the valuation and use an accepted method of delivery. Requirements differ, so a generic valuation report is not always enough.
When arranging the inspection, have the key paperwork ready. That normally includes your lease, the current share you own, details of any improvements and the housing provider’s valuation instructions. Clear information helps the valuer produce a report that is fit for purpose first time, rather than one that gets bounced back for an avoidable administrative detail.
A local valuer also brings useful context. They understand the difference between a headline postcode and a particular micro-location, and between a handsome period conversion with sensible running costs and one with a very photogenic but financially demanding roof.
A practical check before you proceed
Once you receive the valuation, compare the cost of the new share with your borrowing capacity, legal costs and the likely reduction in rent. Then look beyond this transaction. Will the larger share make future staircasing or an eventual sale simpler? Does the lease permit you to staircase to 100%, and are there restrictions you need to understand?
The right decision is not always to buy the maximum share available. For some owners, a smaller increment keeps monthly costs comfortable. For others, buying more now may reduce rent exposure and offer greater flexibility later. The best route depends on your finances, your plans for the home and the fine print in the lease.
Treat the valuation as more than a box to tick. It is a clear, independent snapshot of what you are being asked to buy – and a useful moment to make sure the next slice of your home still feels like a smart one.