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Lease Structure & Law

The legal framework determining income security, cost responsibility, and tenant rights.

FRI Lease (Full Repairing & Insuring)

A lease where the tenant bears all costs for repairs and insurance. The landlord receives 'clear' rent with no leakage.

The gold standard for UK commercial investment. In the US, this is often called 'Absolute Net' or 'Triple Net' (NNN).

Triple Net (NNN)

Tenant pays rent plus all three major property expenses: taxes, insurance, and maintenance.

The 'Holy Grail' for passive investors. Income is effectively pure profit.

Gross Lease

Tenant pays one flat fee. Landlord pays all operating expenses (taxes, maintenance, insurance).

Higher risk for landlord. If inflation spikes operating costs, the landlord's profit shrinks.

Break Clause

A specific date when the tenant (or landlord) can terminate the lease early, usually with 6 months' notice.

Crucial for valuation. A 10-year lease with a break at year 5 is effectively valued as a 5-year lease ('Term to Break').

Security of Tenure

A statutory right for a tenant to renew their lease at the end of the term (e.g., UK Landlord & Tenant Act 1954).

Landlords often ask tenants to 'contract out' of this to retain control of the building.

Alienation

The legal term for a tenant's right to transfer (assign) or sublet their lease to someone else.

Landlords usually restrict this to ensure the new tenant is financially strong.

Dilapidations

The obligation of the tenant to return the property in its original condition at the end of the lease.

Often results in a cash settlement paid by the tenant to the landlord to cover repair costs.

Upward Only Rent Review

A clause ensuring rent can only stay the same or go up at review, never down.

Protects landlord cashflow but is becoming less common in tenant-friendly markets.

Valuation & Yields

Key ratios used to determine the price and return of an asset.

NOI (Net Operating Income)

Total revenue minus all necessary operating expenses. Before debt, tax, or capex.

Formula
GrossRent - Vacancy - Opex
The 'EBITDA' of real estate. The primary number used to value a building.

Net Initial Yield (NIY)

The immediate cash return generated by the property based on current passing rent and purchase price.

Formula
(NOI / PurchasePrice) * 100
The headline price tag. 'This is selling at a 5% yield'.

Cap Rate (Capitalization Rate)

US term for Net Initial Yield. Represents the un-levered return of the asset.

Formula
NOI / AssetValue
Lower Cap Rate = Higher Price. A 4% cap rate implies a 25x multiplier on income.

Reversionary Yield

The anticipated yield once the rent has been increased to current market levels (ERV).

Formula
(EstimatedRentalValue / Price) * 100
Used when a property is 'under-rented' (tenants paying below market rates).

Equivalent Yield

A weighted average of the Initial Yield and Reversionary Yield. It represents the true internal return.

The standard metric used by professional valuers in the UK/EU.

ERV (Estimated Rental Value)

The open market rent the property would achieve if leased today.

If Passing Rent < ERV, the property is 'Reversionary' (good). If Passing Rent > ERV, it is 'Over-rented' (bad).

Asset Management

Operational terms for running a portfolio.

WAULT

Weighted Average Unexpired Lease Term. The average time remaining on all leases, weighted by rent.

Formula
Sum(Remaining Term_i * Rent_i) / Sum(Rent_i)
The single most important metric for income security.

Void Period

The time between one tenant leaving and the next one arriving.

Costly not just due to lost rent, but also due to landlord taking over empty rates/taxes.

Service Charge

A fee collected from tenants to pay for shared services (security, cleaning, lifts).

If the building is inefficient, high service charges make the total cost to tenants too high.

Rent Free Period

An incentive given to tenants (e.g., '6 months free') to sign a lease.

Lowers the 'Effective Rent' while keeping the 'Face Rent' high to support valuation.

Capex vs Opex

Capital Expenditure (upgrading the asset, e.g., new roof) vs Operating Expenditure (maintaining it, e.g., cleaning).

Capex adds value to the balance sheet; Opex reduces profit on the P&L.

Debt & Capital Stack

Leverage, lending, and equity structures.

LTV (Loan to Value)

The size of the loan relative to the asset value.

Formula
LoanAmount / PropertyValue
Commercial loans are typically 50-65% LTV. Higher LTV = Higher Risk.

DSCR

Debt Service Coverage Ratio. How easily income covers mortgage payments.

Formula
NOI / AnnualDebtService
Banks demand >1.25x. If it drops below 1.0x, you are losing cash every month.

Amortization

The gradual repayment of a loan's principal over time.

Unlike Interest Only (IO), amortizing loans build equity but consume more cashflow monthly.

Senior Debt

The primary loan (mortgage). First to be repaid, lowest risk, lowest interest rate.

If the property is sold, the Senior Lender gets paid before anyone else.

Mezzanine Debt

Junior debt that sits between Senior Debt and Equity. Higher risk, higher rate.

Used to bridge the gap when a bank only lends 60% but the developer needs 80%.

Development

Construction and project finance terms.

GDV (Gross Development Value)

The estimated final value of a project once construction is 100% complete and sold/leased.

The 'top line' number in any development appraisal.

Residual Land Value

How much a developer can afford to pay for land.

Formula
GDV - ConstructionCosts - Fees - TargetProfit = LandValue
Land is worth what you can build on it, minus the cost to build it.

Overage

A clause where the land seller gets extra money if the developer achieves a higher value than expected.

Protects the seller from selling cheap land that becomes very valuable.

Practical Completion (PC)

The point when the building is 'finished' and ready for occupation, triggering lease starts and warranty periods.

Often contentious. Does 'finished' mean 100% perfect or just 'usable'?

ESG & Trends

Environmental and modern market factors.

Stranded Asset

A property that will become obsolete due to new environmental regulations (e.g. failing minimum EPC standards).

The biggest risk in real estate today. 'Brown Discount' vs 'Green Premium'.

BREEAM / LEED

Global certification systems for rating the sustainability of buildings.

Institutional investors (Pension Funds) are often banned from buying buildings without these ratings.

Green Premium

The extra rent or value achieved by highly sustainable buildings.

Top tenants will now pay more to be in 'Green' buildings to meet their own corporate targets.

EPC Rating

Energy Performance Certificate rating from A (most efficient) to G (least efficient).

In many markets, properties below minimum EPC standards cannot be legally let.

Net Zero Carbon

A building that produces no net carbon emissions through efficient design and renewable energy.

Increasingly required by institutional tenants to meet their own ESG commitments.

Investment Strategies

Risk profiles and return expectations.

Core

The lowest risk real estate strategy: prime locations, long leases, blue-chip tenants.

Target returns: 6-9% IRR. Think: Trophy office in Manhattan with a 15-year Google lease.

Core Plus

Slightly higher risk than Core, with minor value-add opportunities.

Target returns: 9-12% IRR. Maybe some lease expiries or light capex needed.

Value-Add

Properties requiring significant improvement (renovations, re-leasing, repositioning).

Target returns: 12-18% IRR. Higher risk, but substantial upside if executed well.

Opportunistic

The highest risk strategy: ground-up development, distressed assets, or major repositioning.

Target returns: 18%+ IRR. Can include land speculation or emerging markets.

Sale-Leaseback

A company sells its real estate and immediately leases it back from the buyer.

Unlocks capital for the seller; provides secure income for the buyer.

Build to Suit (BTS)

A development built specifically to a tenant's requirements, with a pre-signed lease.

Lower risk development as income is secured before construction begins.

Ground Lease

The tenant leases only the land and owns (or builds) the structure on top.

Common for retail and infrastructure. Land reverts to owner at lease end with improvements.

Return Metrics

Measuring investment performance.

IRR (Internal Rate of Return)

The annualized return of an investment, accounting for the timing of all cash flows.

The standard metric for comparing investments with different hold periods.

Cash-on-Cash Return

Annual pre-tax cash flow divided by total cash invested.

Formula
Annual Cash Flow / Total Equity Invested
Measures the actual cash yield on your equity, ignoring appreciation.

Equity Multiple

Total cash returned divided by total cash invested.

Formula
Total Distributions / Total Equity Invested
A 2.0x multiple means you doubled your money. Ignores time unlike IRR.

Going-In Cap Rate

The cap rate at acquisition, based on Year 1 NOI.

Formula
Year 1 NOI / Purchase Price
Used to compare the initial yield of different acquisition opportunities.

Exit Cap Rate

The assumed cap rate when selling the property at the end of the hold period.

Usually assumed higher than going-in cap (building is older). Key assumption in any model.

Stabilized NOI

The projected NOI once a property reaches full occupancy and market rents.

Used for valuation when a property is currently vacant or under renovation.

Property Metrics

Physical and operational measurements.

GLA (Gross Leasable Area)

The total floor space available for tenant use in a retail property.

Includes all tenant spaces but excludes common areas like hallways.

NLA (Net Leasable Area)

The actual rentable space a tenant occupies, excluding shared areas.

Rent is typically quoted per NLA square foot/meter.

Efficiency Ratio

The ratio of usable space to total building area.

Formula
NLA / GIA (Gross Internal Area)
Modern offices target 80%+. Poor efficiency means tenants pay for unusable space.

Occupancy Rate

The percentage of rentable space currently leased.

Formula
Leased Space / Total Rentable Space
90%+ is healthy. Below 80% signals distress or transitional asset.

Absorption Rate

The rate at which available space is leased in a market over a period.

Positive absorption = demand exceeds supply. Negative = oversupply.

Rent per Square Foot

The annual rent divided by the total square footage.

Formula
Annual Rent / Square Feet
The standard unit for comparing rents across different sized spaces.