Glossary

255 commercial real estate definitions

Plain-English definitions covering US, UK, EU, and APAC commercial real estate lease regimes. Cross-referenced to long-form guides where relevant.

• Class A — Top-tier classification of office space, distinguished by quality, location, age, and amenitisation.
• Class B — Mid-tier office space — older or less prestigious than Class A, typically at lower rents.
• Class C — Lower-tier office space — older, deferred maintenance, often functionally obsolete.
• Trophy asset — The top sub-tier of Class A — defined by address, architecture, amenitisation, ESG, and tenancy.
• Rentable square feet (RSF) — The measured area on which rent is calculated — includes a share of common areas.
• Usable square feet (USF) — The actual interior area a tenant can occupy.
• Loss factor — The percentage difference between rentable and usable square feet.
• BOMA standard — The Building Owners and Managers Association measurement standard for US office.
• IPMS — International Property Measurement Standards — the global counterpart to BOMA.
• Net internal area (NIA) — UK measurement standard for tenant-usable office area.
• Modified gross lease — The dominant US lease structure — base rent includes operating expenses up to a base year.
• Triple net lease (NNN) — A lease where the tenant pays base rent plus all operating expenses, taxes, and insurance.
• FRI (Full Repairing and Insuring) — The dominant UK commercial lease structure.
• Base year — The reference year for operating expense escalations under a modified-gross lease.
• Operating expenses (op-ex) — The cost of running the building — utilities, maintenance, security, management.
• Service charge — The UK / European equivalent of operating expenses — recharged to tenants.
• Rateable value — The Valuation Office Agency's valuation of a UK property — the basis for business rates.
• Rent-free period — Months of zero base rent at the start of (or layered into) a lease term.
• Tenant improvement allowance (TI / TIA) — Landlord-funded contribution toward the tenant's fit-out">fit-out.
• Face rent — The headline base rent before concessions.
• Effective rent — Face rent minus the present value of all concessions, expressed per square foot per year.
• Dilapidations — The tenant's contractual obligation to return the premises to the lease-specified condition.
• Reinstatement — The tenant's contractual obligation to return the premises to bare-shell or original condition at lease end.
• Schedule of Condition — A photographic and written record of the premises' condition at lease commencement.
• Break clause — A contractual right to terminate the lease before its expiry, on stated conditions.
• Rent review — A scheduled review of base rent during the term, typically to open-market rent.
• Indexation — Annual rent escalation tied to a published price index.
• Cap rate — The yield at which an asset is valued — net operating income divided by capital value.
• Prime yield — The cap rate (yield) for the most prestigious assets in a given submarket.
• Core and shell — The base building delivered without interior fit-out — structure, exterior, MEP risers, lobby.
• Cat A — UK landlord delivery standard — base building plus raised floor, ceilings, basic MEP fit-out.
• Cat B — Tenant-funded interior fit-out — partitions, finishes, furniture, AV.
• Fit-out — The construction work to make a leased premises occupiable for the tenant's use.
• Lease commencement date — The contractual start date of the lease term.
• Substantial completion — Construction milestone at which the premises is functionally ready for occupancy.
• Good Guy Guarantee — A limited personal guarantee common in NYC commercial leases.
• Personal guarantee — A guarantee by an individual of the tenant's lease obligations.
• Letter of credit (LOC) — Bank-issued security for the tenant's lease obligations.
• Rent deposit — Cash security held by the landlord for the tenant's lease obligations.
• Bank guarantee — An on-demand bank guarantee issued in favour of the landlord.
• Sublease — A grant of occupancy from the prime tenant to a sub-tenant.
• Assignment — A full transfer of all lease obligations from the prime tenant to a new tenant.
• Consent to sublet — The landlord's required approval of a proposed sublease or assignment.
• Recapture right — Landlord's right to terminate the lease instead of consenting to a sublease or assignment.
• Right of first offer (ROFO) — Tenant right to be offered adjacent space before the landlord markets it.
• Right of first refusal (ROFR) — Tenant right to match a third-party offer on adjacent space.
• Expansion right — Hard contractual right to lease specified additional space at a stated trigger date.
• Contraction right — Tenant right to surrender a portion of the premises at a stated trigger date.
• Termination option — Tenant right to terminate the entire lease at a stated trigger date, often subject to a fee.
• LEED — US Green Building Council's environmental rating system.
• BREEAM — UK and global environmental rating system from BRE Group.
• NABERS — Australia's National Australian Built Environment Rating System.
• BCA Green Mark — Singapore's mandatory green building rating.
• WELL certification — Health and wellbeing-focused building rating from the International WELL Building Institute.
• Fitwel — Health and wellbeing rating system, lighter touch than WELL.
• EPC (Energy Performance Certificate) — UK statutory energy rating, A-G scale.
• DEC (Display Energy Certificate) — UK operational energy rating for public buildings — A-G scale.
• Flex space / coworking — Office space rented on short-term, fully-managed contracts from a flex provider.
• Managed office — Bespoke fitted office delivered and managed by a third party — between flex and traditional.
• Turnkey — A fully-fitted suite delivered ready for occupancy by the landlord.
• Pre-built suite — A landlord-built office in a Class A building, delivered fitted but typically minimally customised.
• LOI (Letter of Intent) — Non-binding written summary of agreed deal terms — the basis for lease negotiation.
• Heads of terms (HOT) — UK / EU equivalent of the Letter of Intent.
• Per square foot (PSF) — Standard US unit for quoting rent and other office economics.
• Per square metre (PSM) — Standard EMEA / APAC unit for quoting rent.
• Net absorption — The change in occupied office space over a period — positive or negative.
• Vacancy rate — The share of office space currently available for lease in a market.
• Availability rate — Vacancy rate plus space currently leased but available for sublease.
• Stamp duty / SDLT — A tax on lease execution.
• Business rates — UK statutory tax on commercial property occupation.
• Commercial Rent Tax (CRT) — NYC tax on commercial tenants below 96th Street.
• Subdivision cost — Capex required to subdivide a single floor for multiple tenants.
• Base building — The structural and core-services condition of a building before tenant fit-out.
• Workplace strategy — The discipline of designing how a workforce uses physical space.
• Density — The ratio of usable square feet per seat in a workplace.
• End-of-trip facilities — Building-provided showers, lockers, and bicycle storage for cycle and run commuters.
• Amenitisation — The bundle of building-provided amenity space and services.
• Smart building — A building with integrated IoT, sensor, and analytics infrastructure.
• Teiki shakuya (定期借家) — Japanese fixed-term lease — ends on the contract date with no renewal right.
• Futsu shakuya (普通借家) — Japanese ordinary lease — strong tenant renewal rights.
• Genjo kaifuku (原状回復) — Japanese contractual obligation to restore the leased premises to original condition.
• Ejari — Dubai's mandatory lease registration system.
• DIFC — Dubai International Financial Centre — an English-common-law free zone.
• ADGM — Abu Dhabi Global Market — English-common-law free zone.
• VCC — Singapore Variable Capital Company — flexible fund-management vehicle.
• Décret tertiaire — France's Tertiary Sector Decree mandating progressive office energy reductions.
• ILAT (Indice des Loyers des Activités Tertiaires) — French rent index for tertiary leases.
• DGNB — German Sustainable Building Council certification.
• Net Internal Area (NIA UK) — UK measurement standard for office area excluding common areas.
• RICS — Royal Institution of Chartered Surveyors — UK professional body for surveyors and valuers.
• Traditional vs flexible occupancy — The strategic choice between a direct landlord lease and a flex-provider contract.
• TI amortisation — Recovering tenant-improvement spend through a rent uplift over the lease term.
• Free rent abatement — Months of zero base rent at the start of a lease, as concession.
• Expansion option — Tenant's contractual right to lease additional contiguous space.
• Sublease rights — Tenant's right to sublet space, usually subject to landlord consent.
• Assignment rights — Tenant's right to transfer the lease to another entity.
• Good-guy guaranty — Personal guaranty limited to the period the tenant occupies.
• Personal guaranty — An individual's personal financial guarantee of lease obligations.
• Rent deposit deed — UK security mechanism — cash held by the landlord against breach.
• Service charge cap — Contractual cap on annual service-charge increases.
• Operating expense cap — Annual cap on the tenant's share of building operating expenses.
• Gross-up provision — Adjusts opex as if the building were 95–100% occupied.
• Warm shell — Core and shell plus base HVAC, lighting, and floor.
• Cold shell — Bare core and shell with no MEP at the floor.
• Turn-key build-out — Landlord delivers the space fully fit out per tenant spec.
• Spec suite — Pre-built tenant suite delivered turn-key by the landlord.
• WiredScore — Independent rating of building digital connectivity infrastructure.
• SmartScore — Certification of building IoT/smart-systems maturity.
• LEED Platinum — Highest tier of US Green Building Council's LEED certification.
• BREEAM Outstanding — Highest tier of UK BREEAM environmental certification.
• ENERGY STAR rating — US EPA building energy-performance benchmark, scored 1–100.
• EPC rating — UK/EU Energy Performance Certificate rating, A (best) to G.
• Minimum Energy Efficiency Standards (MEES) — UK regulation banning the letting of energy-inefficient buildings.
• GRESB — Global ESG benchmark for real estate funds and assets.
• Corporate Sustainability Reporting Directive (CSRD) — EU rule requiring detailed ESG reporting for large companies.
• Scope 1 emissions — Direct emissions from sources owned or controlled by the entity.
• Scope 2 emissions — Indirect emissions from purchased electricity, heat, and cooling.
• Scope 3 emissions — All other indirect emissions in the value chain.
• Embodied carbon — Lifecycle carbon emissions from construction materials and processes.
• Operational carbon — Carbon emitted by a building's day-to-day operations.
• Power purchase agreement (PPA) — Long-term contract to buy renewable electricity from a specific generator.
• Renewable Energy Certificate (REC) — Tradable certificate proving 1 MWh of renewable generation.
• Guarantees of Origin (GO) — European equivalent of US RECs.
• PSF rentable (rent psf, RSF basis) — Rent quoted per rentable square foot.
• PSF usable (USF basis) — Rent allocated to the actual demised space.
• BOMA measurement standard — US trade-body standard for measuring office floor areas.
• Carpet area — India-market measure of internal usable space within walls.
• Tsubo — Japanese unit of floor area, ~3.305 m².
• Ping — Taiwanese unit of floor area, ~3.306 m².
• Yardstick rent — Notional rent used in service-charge gross-ups.
• Stepped rent — Pre-agreed rent increases at fixed dates over the lease term.
• CPI-linked rent — Rent indexed to a published consumer-price index.
• Upwards-only rent review — UK rent review mechanism that prohibits rent decreases.
• Stamp duty land tax (SDLT) — UK transaction tax on lease grants and assignments.
• Registration charges (India) — Indian state-level fee for lease registration.
• VAT on rent — EU value-added tax applied to commercial rent at landlord's election.
• GST on rent — Goods-and-services tax on commercial rent in APAC markets.
• Tenant occupier tax — Property tax assessed on the occupier rather than the owner.
• Taxe foncière — French local property tax, paid by owner but typically reimbursed by tenant.
• Property rates (HK) — Hong Kong occupier tax of 5% of estimated rental value.
• Property tax (Singapore) — Singapore annual tax of 10% of annual value for non-residential.
• Land appreciation tax (China) — Chinese capital-gains-style tax on real-property disposals.
• Yield on cost — Annual NOI divided by total acquisition + capex cost.
• Internal rate of return (IRR) — Annualised return on a multi-year investment cash flow.
• Net operating income (NOI) — Effective gross income less operating expenses, before debt and capex.
• Headline rent — Quoted face rent, before concessions.
• Net effective rent — US-market effective rent: face rent net of free rent and TI amortisation.
• Concession package — Sum of free rent + TI + other landlord giveaways.
• Blend and extend — Renegotiating rent down in exchange for extending the term.
• Early renewal — Renegotiating an extension before the lease expires.
• Operating covenants — Tenant promises about how the space will be used.
• Co-tenancy clause — Right to abate rent if anchor tenants leave.
• Bumps and resets — Stepped rent (bump) plus periodic market reset.
• Fair market rent (FMR) — Negotiated definition of market rent for renewal options.
• Appraisal clause — Mechanism for setting renewal rent via independent appraisal.
• Loss payee endorsement — Insurance clause naming the landlord on the tenant's policy.
• Casualty clause — Lease terms governing damage and rebuild after a fire/disaster.
• Condemnation clause — Lease terms governing partial or total taking by eminent domain.
• Estoppel certificate — Tenant statement confirming lease terms, often required for landlord financing or sale.
• Subordination, non-disturbance, and attornment (SNDA) — Tri-party agreement protecting the tenant if the lender forecloses.
• Subordination — Tenant lease ranks below the landlord's mortgage in the title hierarchy.
• Non-disturbance — Lender's promise not to terminate the lease on landlord default.
• Attornment — Tenant's promise to recognise a successor landlord (e.g., the lender).
• Cap on tax pass-through — Cap on the tenant's share of real-estate-tax escalations.
• Tenant improvement allowance (TI) — Landlord-funded build-out budget for the tenant fit-out.
• Fit-out overrun — Cost above the TI allowance, paid by the tenant or amortised.
• Permitting risk — Risk that fit-out construction permits delay occupancy.
• Certificate of occupancy (CO) — Local-authority sign-off that the space may be occupied.
• Demising walls — Walls separating one tenant's space from another's or common area.
• Raised access floor — Floor system with removable panels covering MEP services.
• VAV system — Variable Air Volume HVAC — adjusts airflow per zone.
• Chilled beam — Energy-efficient HVAC using chilled water rather than circulated air.
• VRF system — Variable Refrigerant Flow — multi-zone heat pump cooling/heating.
• Primary power feed — First-line electrical service from the utility to the building.
• N+1 redundancy — One spare unit beyond the minimum required (N).
• Tier III equivalent (data) — 99.982% uptime data infrastructure target.
• Loading dock access — Tenant rights to use the building loading dock.
• Freight elevator access — Right to schedule the freight elevator for moves and deliveries.
• After-hours HVAC — HVAC service outside building standard hours, typically billed hourly.
• Amenity floor — Dedicated tenant-amenity floor in trophy Class A buildings.
• End-of-trip facilities — Showers, lockers, bike storage for cycling commuters.
• Biophilic design — Architectural design using nature, daylight, and natural materials.
• Podium-and-tower typology — Building typology with a wide low-rise podium and a slim residential/office tower above.
• Ground-floor activation — Retail, food, and public realm at the building base.
• Sky lobby — Mid-building elevator-transfer floor in supertall Class A buildings.
• Destination-dispatch elevators — Elevator system grouping passengers by floor for efficiency.
• Façade replacement — Major capex programme replacing the building envelope.
• Deep retrofit — Whole-building reposition including facade, MEP, and core upgrades.
• Asset management plan — Owner's roadmap for capex, leasing, and exit on a Class A asset.
• Yield shift — Change in market cap rates; the largest valuation driver.
• Rental growth assumption — Projected annual rental-rate change in a DCF.
• Tenant retention rate — Percentage of expiring leases renewed in place.
• Downtime assumption — Months of vacancy assumed between tenant departure and replacement.
• Core open-end fund — Stabilised real-estate fund with quarterly liquidity.
• Value-add fund — Closed-end fund targeting reposition and lease-up returns.
• Opportunistic fund — Highest-risk closed-end fund targeting development and distressed.
• Open-end fund — Real-estate fund with periodic subscription/redemption windows.
• Closed-end fund — Fund with a fixed term — capital is called and returned over the life.
• Joint venture (JV) — Partnership structure between an operator and a capital partner.
• Promote (carry) — Sponsor's share of profits above the hurdle rate.
• Preferred return — Hurdle return paid to LPs before promote kicks in.
• Management fee — GP's annual fee for managing the fund or JV.
• Acquisition fee — GP fee charged at acquisition of an asset.
• Disposition fee — GP fee at sale of an asset.
• Capital drawdown — Calling committed equity from LPs to fund acquisitions or capex.
• J-curve — Early negative returns followed by positive returns in a closed-end fund.
• Vintage year — Year a fund first deploys capital — the key benchmark for performance.
• Core-plus fund — Income-focused fund with light value-add overlay.
• Non-recourse loan — Loan secured only by the asset, with no personal/sponsor guarantee.
• Recourse loan — Loan with full personal/sponsor guarantee.
• Loan-to-value (LTV) — Loan amount divided by asset value.
• Debt service coverage ratio (DSCR) — NOI divided by annual debt service.
• Debt yield — NOI divided by loan amount — lender risk metric independent of cap rate.
• Interest-only (IO) period — Loan period with no principal amortisation.
• Commercial mortgage-backed securities (CMBS) — Pooled commercial loans securitised into bonds.
• Agency debt — Loans by Fannie/Freddie/HUD on multifamily assets.
• Preferred equity — Equity tranche paid before common equity, after debt.
• Mezzanine debt — Subordinated loan tranche between senior debt and equity.
• Build-to-suit (BTS) — Custom-built premises designed for a specific tenant.
• Sale-leaseback — Owner-occupier sells the building and leases it back from the buyer.
• Ground lease — Long-term lease of land where tenant owns improvements.
• Leasehold vs freehold — Long-term lease ownership vs absolute title to land.
• Hold and occupy strategy — Owner-occupier strategy retaining real estate as strategic asset.
• Real estate as a service (REaaS) — Flex/serviced model bundling space, services, and amenity into one fee.
• Hub-and-spoke portfolio — Central HQ with smaller satellite offices in the metro.
• Neighborhood of choice — Submarket selection driven by talent commute economics.
• Transit isochrone — Map of areas reachable within X minutes by public transit.
• Tenant representation broker — Commercial broker who exclusively represents the tenant.
• Agency broker — Broker who exclusively represents landlords.
• Stalking-horse offer — Initial bid that sets a floor in a competitive sale process.
• Broken-deal cost — Costs incurred on an investment that fails to close.
• Physical due diligence — Engineering survey of the building during acquisition.
• Phase I environmental site assessment — Standard environmental review at acquisition.
• Anchor tenant — Largest, longest-term, highest-credit tenant in a building.
• Lease-up period — Time from CO to stabilised occupancy.
• Stabilised occupancy — The occupancy level a building targets long-term, typically 90–95%.
• Submarket rent index — Average asking or transacted rent across a defined submarket.
• Net absorption — Change in occupied space over a period.
• Construction pipeline — Square footage under construction or fully approved for delivery.
• Submarket tier (trophy / prime / established / emerging) — Quality-tier classification of submarkets within a city.
• Rent roll — Schedule of all leases at an asset, by tenant, suite, term, and rent.
• Weighted average lease term (WALT/WAULT) — Average remaining lease term, weighted by rent.
• Tenant credit rating — External or internal credit grade applied to anchor tenants.
• Lease-incentive amortisation — Accounting treatment of TI and free rent under IFRS 16 / ASC 842.
• IFRS 16 — International accounting standard requiring on-balance-sheet lease recognition.
• ASC 842 — US GAAP equivalent of IFRS 16 — on-balance-sheet lease recognition.
• Right-of-use asset (ROU) — Balance-sheet asset representing the tenant's right to use leased space.
• Lease liability — Balance-sheet liability for the present value of future lease payments.
• Cost per seat (KPI) — Total occupancy cost divided by seat count.
• Seat utilisation (KPI) — Average daily occupied seats divided by total seats.
• Occupancy density — Square feet of usable space per seat.
• Indoor air quality (IAQ) — Quality of breathable air inside the building.
• MERV rating — Filter efficiency rating used in HVAC systems.
• Green lease — Lease with cooperative landlord-tenant ESG performance clauses.
• Split incentive — Misaligned ESG investment incentive between landlord and tenant.