Shared ownership mortgages

A shared ownership mortgage allows you to buy a percentage of a property (typically 10%-75%) and pay subsidised rent on the remaining share owned by a housing association. You take a mortgage only on the share you purchase, making shared ownership a structured route into home ownership for buyers priced out of the open market.

This guide explains how shared ownership mortgages work, eligibility rules, affordability, staircasing, risks, and lender criteria, using UK-specific mortgage and regulatory context.

What is a shared ownership mortgage?

A shared ownership mortgage is a regulated residential mortgage used to purchase part of a leasehold property. The buyer:

• Owns a fixed percentage of the home
• Pays rent on the unowned share
• Can increase ownership later via staircasing

You are both a leaseholder and a mortgagor, with rights and obligations set out in the shared ownership lease.

How shared ownership works (step-by-step)

• Eligibility assessment via a housing association
• Choose share size (e.g. 25%, 40%, 50%)
• Mortgage arranged on the purchased share only
• Rent paid on the remaining share (typically 2.5%-3% of its value per year)
• Optional staircasing later, subject to valuation and lease terms

Example Property value: £300,000 Purchased share: 30% (£90,000) Mortgage required: £85,500 (95% LTV of share) Rent payable on remaining 70%

Shared ownership eligibility criteria

Shared ownership schemes are designed for buyers unable to afford full ownership.

Typical requirements:

• Household income up to £80,000 (£90,000 in London)
• First-time buyers, or former homeowners unable to re-buy
• Property must be your main residence
• Approval required from the housing association
• You must pass standard mortgage affordability and credit checks

Local authority priority rules may apply.

Deposit and loan-to-value (LTV)

• Deposit: Usually 5%-10% of the share value
• Maximum LTV: Up to 95% of the purchased share with selected lenders
• Deposit is not based on the full property value

This makes shared ownership deposits materially lower than standard purchases.

Mortgage rates and lender availability

• Rates are generally slightly higher than standard residential mortgages
• Fewer lenders operate in the shared ownership market
• Fixed-rate options are most common
• All lending is FCA-regulated residential mortgage lending

A whole-of-market broker is important due to lease, rent, and staircasing restrictions that exclude many mainstream lenders.

Rent and service charges explained

In addition to your mortgage payment, you will usually pay:

• Rent on the unowned share (reviewed annually, often linked to RPI/CPI)
• Service charges (particularly on flats)
• Ground rent (if applicable under the lease)

These costs must be included in affordability calculations.

Staircasing: buying more shares

Staircasing allows you to increase ownership over time.

Key points:

• Minimum increments usually 5%-10%
• Share price based on current market value
• Valuation and legal fees apply each time
• Many modern leases allow staircasing to 100% ownership
• Older schemes may cap ownership at 80%

Staircasing is optional, not mandatory.

Selling a shared ownership property

When selling:

• Housing association typically has a nomination period (often 4-8 weeks)
• If no buyer is nominated, the property can be sold on the open market
• Sale price is based on an independent RICS valuation
• You sell only the share you own, unless stair cased to 100%

Liquidity can be lower than standard residential property.

Risks and limitations

• You pay mortgage + rent + service charges
• Rent and service charges can increase over time
• Restricted lender choice
• Selling can take longer than a standard property
• Lease terms are critical and must be reviewed carefully

Shared ownership is not a short-term or speculative strategy.

Is shared ownership suitable for you?

Shared ownership is most appropriate if:

• You cannot afford full ownership today
• You want long-term security rather than renting
• You understand the combined cost structure
• You are comfortable with leasehold obligations

It is less suitable if you expect to move frequently or want full control immediately.