Commercial Maintenance Obligations in Bulgaria: NNN and Service Charges

Maintenance in Bulgarian commercial real estate is arguably the most heavily negotiated segment of a lease. While the Obligations and Contracts Act (OCA) provides a default framework for who is responsible for repairs, commercial B2B contracts almost universally override these statutes to shift the vast majority of financial and physical burderns onto the corporate tenant.

If a commercial lease is poorly drafted and relies on the state defaults, a landlord can find themselves legally responsible for replacing million-Euro HVAC systems or rebuilding warehouse roofs.

Disclaimer: This guide provides general legal information for educational purposes and does not constitute legal advice. Commercial leasing is highly complex and heavily reliant on contract drafting. Always consult a licensed local attorney for advice specific to your situation. Information last verified: March 2026.

The Weak Default: OCA Article 231

If two companies sign a generic lease agreement that says nothing about maintenance, they fall back onto the defaults of the Obligations and Contracts Act (OCA), Article 231.

Under the OCA default:

1. Tenant (Minor Repairs): The tenant is responsible for "minor repairs related to ordinary use," such as replacing lightbulbs, fixing minor plumbing clogs, or painting scuffed walls.
2. Landlord (Major/Structural Repairs): The landlord is responsible for all "capital repairs" not caused by the tenant's negligence. This includes the roof, structural foundations, main plumbing stacks, and major installed appliances like central heating units.

For high-yield commercial landlords, retaining liability for capital repairs is unacceptable. Therefore, professional leases explicitly redefine these obligations.

Structure 1: Triple Net (NNN) Leases

For standalone commercial assets—such as massive logistics warehouses near Plovdiv, factory production halls, or standalone big-box retail stores—the market standard in Bulgaria is the Triple Net Lease (NNN).

A true NNN lease is drafted to make the lease a purely passive financial instrument for the landlord. The lease explicitly overrides OCA Art. 231, shifting 100% of the operational and structural liabilities to the commercial tenant.

Under a Bulgarian NNN lease, the tenant pays the Base Rent, plus:

• Net 1 (Taxes): All municipal property taxes and garbage collection fees (Данък сгради и Такса смет).
• Net 2 (Insurance): The premium for comprehensive building insurance covering the physical structure (fire, earthquake, flood) with the landlord named as the beneficiary.
• Net 3 (Maintenance): Absolute responsibility for every repair—both minor and major capital repairs. If the commercial roof collapses under snow or the central chiller system dies, the tenant must pay the hundreds of thousands of Euros required to replace it out of their own pocket, while continuing to pay full base rent.

Structure 2: Office Towers and Service Charges (CAM)

For Class-A office buildings in Sofia (where multiple tenants share a high-rise) or retail shopping malls, a Triple Net lease is physically impossible to execute, as tenants share common infrastructure.

Instead, landlords use a "Gross" base rent coupled with a mandatory Service Charge (or Common Area Maintenance / CAM fee - Такса поддръжка).

The Service Charge Mechanics

Instead of making the tenant fix the roof, the landlord’s management company performs all capital, structural, and common area maintenance. To cover this, they charge the tenant a non-negotiable monthly fee on top of the base rent.

• The Rate: Service charges in prime Sofia offices typically range from €2.50 to €4.50 per square meter, per month.
• Open Book vs. Fixed:
  • Fixed (Flat Fee): The tenant pays exactly €3.00/sqm, regardless of what the landlord actually spends. The landlord absorbs the risk of sudden cost spikes (like a sudden rise in security guard wages).
  • Open Book (Reconciliation): The tenant pays estimated advance payments. At the end of the fiscal year, the landlord opens the books, calculates the exact real-world expenses for running the building, and issues a massive "Equalization" invoice to the tenants to cover any deficit.

What is covered in the Bulgarian Service Charge?

A well-drafted lease will include an exhaustive "Schedule of Services" detailing what the CAM fee covers, universally including:

• Heating, cooling, and lighting of common areas (lobbies, stairwells).
• Elevator maintenance contracts and certifications.
• 24/7 Security guards and CCTV operation.
• Daily cleaning of lobbies and shared bathrooms.
• Snow removal and landscaping.
• Property management administrative fees (often marked up by 5-15%).

Reinstatement (Dilapidations) Obligations

Perhaps the most aggressive maintenance clause in a Bulgarian commercial lease occurs on the very last day of the contract.

Unlike residential tenants who just have to broom-sweep an apartment, commercial tenants (who often install glass partition walls, server rooms, or custom restaurant kitchens) are bound by strict Reinstatement Clauses. The tenant is legally obligated to tear out every single modification they built over the last 5 years and return the property to its exact "Shell and Core" condition. If the corporate tenant fails to fully demolish and reinstate the property, the Bulgarian landlord will hire a contractor to do it, deduct the massive cost from the security deposit/Bank Guarantee, and sue the tenant for any remaining balance.

Automating Commercial Operations with Landager

Managing fluctuating Service Charge (CAM) budgets across a 20-story Class A office building using spreadsheets guarantees calculation errors and furious corporate tenants demanding audits. Landager acts as an enterprise-grade property management operating system. For multi-tenant buildings, Landager natively processes Open-Book Service Charge reconciliations, calculating exact square-meter pro-rata shares for every tenant and generating flawless, transparent "Equalization Invoices" at year-end. For standalone assets, Landager tracks Triple Net (NNN) compliance, automatically demanding proof of renewed property insurance policies and municipal tax receipts from your corporate tenants, ensuring that your passive commercial yields remain truly passive and structurally protected.

Back to the Bulgarian Commercial Overview.