Who is eligible for shared ownership?

First-time buyers or those who previously owned but cannot currently afford to buy. Household income must be £80,000 or less (£90,000 in London) and you must not already own a home.

Do I pay stamp duty on a shared ownership property?

You can choose to pay SDLT on your share now or upfront on the full market value. Paying on the share is usually cheaper. First-time buyer relief may apply on properties up to £625,000.

What does staircasing mean and how does it work?

Staircasing means buying additional shares (minimum 10%, or 1% with gradual staircasing) at current market value. Your mortgage increases and rent decreases with each staircase up to 100% ownership.

Can I sell a shared ownership property?

Yes. Under 100% ownership, the housing association has 8 weeks right of first refusal. At 100%, you can sell freely. Proceeds are split according to ownership percentages.

Shared Ownership Calculator

Calculate the total monthly cost of a shared ownership property — mortgage on your share plus rent on the housing association's share. Includes staircasing analysis.

Full Property Value

Share to Buy

Deposit on Your Share

£10%

Mortgage Rate

Mortgage Term

yrs

Rent Rate on HA Share

Total Monthly Cost

£910

£395 mortgage + £516 rent · 25% share of £300,000

Your Share Value

£75,000

HA Share Value

£225,000

Mortgage Amount

£67,500

Monthly Mortgage

£395

Monthly Rent (HA)

£516

vs Full Ownership

£800 cheaper/mo

Staircasing: Buy 10% More

Cost to Buy 10%

£30,000

Extra Monthly Mortgage

+£175

Rent Saving

-£69

Net Monthly Change

+£107

How to Use This Shared Ownership Calculator

Enter the Full Property Value, the Share to Buy (10–75%), your Deposit on Your Share, and your expected mortgage rate. The calculator also needs the Rent Rate on HA Share — this is set by the housing association, typically around 2.75% of the HA's share value per year.

What Is Shared Ownership?

Shared Ownership allows you to buy a percentage share (typically 10–75%) of a property and pay subsidised rent on the remainder to a housing association. You take out a mortgage only on the share you buy, making it more accessible than buying outright. Over time you can buy more shares through a process called staircasing.

Staircasing

Staircasing means buying additional shares in your property, typically in minimum 10% tranches. Each time you staircase, your mortgage increases but your rent decreases. The calculator shows the net monthly cost of buying an additional 10% share at the current property value.

Shared Ownership vs Help to Buy

Shared Ownership and Help to Buy are different schemes. Help to Buy provides a government equity loan (up to 20% of the property value, 40% in London) on a new-build, while Shared Ownership is a part-purchase part-rent arrangement available on some new builds and resale properties.

Shared Ownership Calculation

Share Value = Property Value × (Share % / 100)
HA Share = Property Value − Share Value
Mortgage = Share Value − Deposit

Monthly Mortgage = Standard repayment formula on Mortgage

Monthly Rent = (HA Share × Rent Rate %) / 12
(Rent Rate typically 2.5–3% of HA share value per year)

Total Monthly = Monthly Mortgage + Monthly Rent

Example: Shared Ownership in Manchester

Priya's 40% Share Purchase in Salford

Priya earns £32,000 and cannot afford to buy outright in Salford. She purchases a 40% share of a £220,000 new-build flat through a housing association shared ownership scheme.

Full Property Value	£220,000
Priya's Share (40%)	£88,000
HA Share (60%)	£132,000
Deposit (10% of share)	£8,800
Mortgage	£79,200
Monthly Mortgage (4.75%, 25yr)	£454
Monthly Rent (2.75% of HA share)	£303
Total Monthly	£757
Full ownership mortgage (10% dep)	£1,151/mo
Monthly Saving vs Full Ownership	£394

Priya's total monthly cost of £757 is 28% of her take-home pay — affordable. When she has saved enough to staircase to 50%, her rent drops by £50/month and her mortgage increases by £58/month — a net cost of just £8/month for owning 10% more.

Frequently Asked Questions

Shared ownership is available to first-time buyers or those who previously owned a home but cannot currently afford to buy. Your household income must be £80,000 or less per year (£90,000 or less in London). You must not already own a home. Priority is given to military personnel and people with a local connection to the area where the property is located.

You have two options for SDLT on shared ownership: pay on the share you're buying now (and then again on each staircase), or pay upfront on the full market value (called "market value election"). For most buyers, paying on the share now is cheaper. First-time buyer SDLT relief can apply to shared ownership purchases where the full property value is £625,000 or less.

Staircasing is the process of buying additional shares in your shared ownership property. You can staircase up to 100% ownership (known as "full staircasing"). Each time you staircase, a surveyor values the property and you pay the current market value for the additional share. Most shared ownership leases allow minimum tranches of 10%, though the government's new model allows tranches as small as 1% (gradual staircasing). You will need a remortgage or additional borrowing to fund each staircase.

Yes, but with restrictions. If you own less than 100%, the housing association typically has "right of first refusal" — they have 8 weeks to find a buyer before you can market it publicly. If you own 100%, you can sell freely on the open market. When you sell, you receive the proportion of the sale proceeds equal to your share percentage (the HA receives the rest). You'll need to repay your mortgage from your share of the proceeds.