The family home is often the single biggest asset in a marriage. It's also the biggest source of conflict.
One party wants to value it high (to get a bigger buyout). The other wants to value it low (to keep it).
Here's the thing: in financial disclosure and negotiation, the key number is usually Net Equity, not the marketing price you see on Rightmove.
This guide shows you how to calculate it accurately for your Form E financial statement.
Market Appraisal vs. Formal Valuation: What's the Difference?
For the initial stages of a divorce (and for using our Divorce Settlement Calculator), you don't necessarily need to pay for a formal valuation straight away.
Market Appraisal — Free
Ask 3 local estate agents to visit and give you a suggested marketing price. Taking the average of these three is a common starting point for negotiation and mediation.
Formal Valuation (RICS Red Book) — Paid (~£300–£800)
This is a surveyor's expert opinion provided in accordance with RICS Red Book standards. You typically only need this if you and your ex cannot agree on a value.
What if We Can't Agree? The Single Joint Expert Route
If proceedings are issued and you still cannot agree on the value, the court will rarely let you each hire your own valuer to argue it out.
Instead, under Practice Direction 25D, the court typically orders a "Single Joint Expert" (SJE)—one independent valuer, instructed jointly by both of you.
The court gives this report significant weight. It avoids a costly "battle of the experts" and keeps things moving.
The Formula: How to Calculate Net Equity
Your "share" isn't based on the headline value of the house. It's based on what would actually be left if you sold it today.
To find the true pot available for distribution, Form E requires you to deduct the estimated costs of sale.
The Net Equity Formula
Gross Value
− Outstanding Mortgage
− Early Repayment Charges
− Estimated Sale Costs
─────────────────────────
= Net Equity
Before You Calculate: Gather These Documents
| Document | Why You Need It |
|---|---|
| Latest Mortgage Statement | For the main balance |
| Mortgage Redemption Statement | This is where Early Repayment Charges usually appear |
| 2–3 Estate Agent Appraisals | Screenshots or emails are fine |
| A Rough Sale Cost Estimate | Often modelled at ~3% for disclosure, but adjust if you have specific quotes |
Why Deduct ~3%?
Even if one of you keeps the house, the court often allows for a "notional" deduction of sale costs:
- Estate Agent Fees: Typically 1%–2% + VAT
- Legal/Conveyancing Fees: Often fixed, but can add up to ~0.5%–1%
Example Calculation
| Item | Amount |
|---|---|
| House Value | £500,000 |
| Mortgage & Redemption Penalties | −£300,000 |
| Estimated Sale Costs (3%) | −£15,000 |
| True Net Equity | £185,000 |
That's £185,000—not £200,000. The £15,000 difference matters when you're splitting assets.
The "Buyout" Scenario: Can I Keep the House?
This is the most common question we get.
To keep the house, you generally need to do two things:
1. Refinance
You must be able to afford the total mortgage in your sole name. Your lender will stress-test your single income.
2. Pay the Lump Sum
You must pay your ex their share of the Net Equity—usually 50%, unless you have greater "Needs."
If you cannot raise the cash for the buyout, the house usually has to be sold.
Run the Scenarios
Will a 50/50 split of the equity give you enough cash to buy a new place? Or do you need 60%?
Use our House Buyout Calculator to model the buyout lump sum, different equity splits and rough remortgage affordability. Then add pensions, savings and debts with the Settlement Calculator.
👉 Calculate Your House Buyout Scenario
Related Form E guides
If you are working through Form E in order, start with the complete Form E section-by-section guide, then check Form E documents checklist, completed Form E example, bank statements, pensions & CETVs, budget & income needs, and orders sought.