When Should a Landlord Split a Large Commercial Unit?
A landlord owns a 20,000 sq ft industrial building.
It is vacant.
Enquiries arrive, but most applicants want:
- 3,000 sq ft
- 5,000 sq ft
- 7,500 sq ft
Very few need the whole building.
The obvious question appears:
Should we split it?
Subdividing a large commercial property can sometimes transform an underperforming building.
Instead of waiting for one large tenant, the landlord can potentially create several smaller units and appeal to a much wider occupier market.
It may also increase the total rent generated by the property.
But subdivision is not automatically the right answer.
It can require:
- Construction
- Separate services
- Fire separation
- New access
- Additional management
And badly designed subdivision can permanently damage a good building.
For commercial landlords across Bury, North Manchester and Greater Manchester, the decision should therefore be driven by evidence rather than frustration with a vacant unit.
Start With the Market, Not the Building
The first question should not be:
“Can we physically split it?”
It should be:
“What size units are businesses actually looking for?”
That distinction matters.
Enquiry Data Is Extremely Valuable
If a 20,000 sq ft warehouse receives repeated enquiries from businesses wanting 5,000 sq ft, the market is giving the landlord information.
Record it.
Look for Patterns
One enquiry proves very little.
Ten similar enquiries can indicate genuine demand.
Track:
- Requested size
- Proposed use
- Budget
- Required features
This helps identify whether subdivision is worth investigating.
Do Not Split Based on One Applicant
A tenant may ask:
“Would you split?”
The landlord immediately spends substantial money dividing the property.
Then the tenant disappears.
Do not redesign an asset around an uncommitted enquiry without considering the wider market.
Understand Demand for the Whole Unit First
Before subdivision, ask why the larger unit is not letting.
Possible reasons include:
- Price
- Condition
- Specification
- Location
- Weak demand
Splitting will not solve every problem.
A Poor Building Does Not Become Good Simply Because It Is Smaller
Imagine a warehouse with:
- Major roof leaks
- Poor loading
- No parking
Dividing it into four units creates four units with the same fundamental problems.
Fix the underlying product first.
Large Units Have Their Own Market
Do not assume large buildings are inherently difficult to let.
Certain occupiers specifically require substantial accommodation.
These might include:
- Logistics
- Manufacturing
- Storage
If local supply is limited, preserving the whole building could be valuable.
Consider Scarcity
If there are many 5,000 sq ft units available locally but very few 20,000 sq ft buildings, subdivision could remove one of the property’s strongest advantages.
Study competing stock.
Smaller Units Often Have a Broader Tenant Pool
The attraction of subdivision is straightforward.
More businesses can afford smaller premises.
A 4,000 sq ft unit may appeal to:
- Trades
- E-commerce
- Light manufacturers
- Local distributors
The potential tenant pool can be much larger than for a 30,000 sq ft warehouse.
Affordability Drives Demand
Even if smaller units achieve a higher rent per square foot, the total monthly payment can remain manageable for SMEs.
This can create strong demand.
Higher Rent Per Square Foot Is Possible
Smaller commercial units can sometimes command stronger rates per square foot than larger buildings.
But landlords should not assume this automatically.
Use actual local evidence.
Calculate the Aggregate Rent
Suppose a 20,000 sq ft warehouse might let as a whole for:
£120,000 per annum.
If split into four units, the combined achievable rent might potentially be higher.
But that extra income is only meaningful after considering additional costs.
Subdivision Costs Money
Potential works can include:
- Separating walls
- New doors
- Electrical alterations
- Toilets
- Metering
The project requires a proper budget.
Calculate the Payback Period
If subdivision costs:
£200,000
and increases net annual income by:
£25,000
the landlord needs to consider whether that return justifies:
- Capital
- Risk
- Management
Do not look only at headline rent.
Void Reduction Can Be More Important Than Rent Uplift
Perhaps subdivision does not dramatically increase the rent per square foot.
But smaller units let significantly faster.
Reducing vacancy can still create substantial value.
Vacancy Has a Cost
An empty building can create:
- Security
- Insurance
- Maintenance
- Rates
The longer the void, the greater the cost.
Business Rates Need Consideration
Subdivision can potentially affect how premises are assessed.
Landlords should obtain appropriate advice regarding the specific property.
The Valuation Office Agency provides official information on business rates.
Start With a Concept Layout
Before building anything, sketch how subdivision could work.
Consider:
- Unit boundaries
- Entrances
- Loading
- Parking
A simple plan can expose problems immediately.
Every Unit Needs Practical Access
A line drawn through the middle of a floorplan does not automatically create two usable commercial units.
Each unit may need its own:
- Entrance
- Loading
- Escape routes
Think operationally.
Loading Doors Can Determine the Layout
Suppose a warehouse has only one roller shutter.
Splitting it into three units may require additional loading doors.
That affects:
- Cost
- Structure
- Yard layout
Do Not Create Units Without Proper Loading
Industrial occupiers usually need practical goods access.
A cheap subdivision that leaves two units with only pedestrian doors may severely restrict demand.
Yard Allocation Can Be Difficult
A large warehouse may have one shared yard.
After subdivision, decide:
- Who can use it?
- Which area belongs to each unit?
- Where can vehicles turn?
Poorly planned yards create disputes.
Draw the Vehicle Movements
Imagine each tenant operating simultaneously.
Where do:
- Vans park?
- Lorries unload?
- Customers wait?
If the answer is “wherever there is room”, the design probably needs more thought.
Parking Needs Allocation
One large tenant may have used 20 spaces.
Four smaller businesses may collectively need 35.
Subdivision can increase parking intensity.
Customer-Facing Occupiers Can Increase Traffic
A trade counter may generate far more daily vehicle movements than a storage occupier.
The tenant mix affects site design.
Consider Whether Shared Parking Will Work
Shared arrangements can provide flexibility.
But they can also create conflict.
Clear lease documentation and estate management are important.
Separate Entrances Improve Independence
Where possible, each unit having a clear entrance can improve:
- Identity
- Security
- Customer access
This can make the units easier to market.
Signage Needs Planning
Several occupiers require:
- Unit numbers
- Directional signs
- Business signage
Think about how visitors will find them.
Fire Safety Is Fundamental
Creating separate occupational units can change the building’s fire-safety requirements.
The project may require appropriate:
- Fire separation
- Escape arrangements
- Detection
Professional advice should be obtained.
The Government provides workplace fire-safety guidance.
UK Government – Workplace Fire Safety
Do Not Treat the Dividing Wall as Simple Partitioning
The required specification depends on:
- Building
- Use
- Fire strategy
Obtain appropriate technical advice.
Building Regulations May Apply
Alteration and subdivision works can engage Building Regulations requirements.
The Government provides guidance through the Planning Portal and approved documents.
Planning Portal – Building Regulations
Planning Also Needs Consideration
Depending on the property and proposed changes, planning issues may arise.
For example:
- External alterations
- New uses
- Increased traffic
Seek advice appropriate to the scheme.
Separate Electricity Can Become a Major Cost
A large building may have one electrical supply.
Multiple tenants create questions.
Will electricity be:
- Separately metered?
- Recharged by the landlord?
The correct arrangement should be planned carefully.
Future Occupiers May Have Different Power Requirements
One unit might attract:
- Storage
while another attracts:
- Manufacturing
Their electrical requirements could be very different.
Do Not Promise Power Without Evidence
If a unit is marketed as having three-phase electricity or particular capacity, make sure the information is accurate.
Water Supplies Need Consideration
Each unit may require:
- Toilet
- Kitchen
Separate metering or charging arrangements may also be necessary.
Drainage Can Affect Where Toilets Go
The cheapest place to create a WC may be dictated by existing drainage.
This can influence subdivision layout.
Gas and Heating May Need Separation
If the existing property has one heating system, ask whether it can practically serve multiple occupiers.
Independent heating may sometimes be preferable.
Broadband Is Increasingly Important
Each tenant will probably need its own telecoms arrangement.
Consider access routes for:
- Fibre
- Cabling
during the works.
Design for Future Maintenance
Landlords should still be able to access relevant:
- Meters
- Plant
- Roof areas
without unnecessarily entering another tenant’s premises.
Common Areas Add Management
A subdivision may create:
- Shared corridors
- Shared toilets
- Shared yards
Every common area needs management.
Sometimes Self-Contained Units Are Better
Where practical, giving each occupier its own:
- Entrance
- WC
- Utilities
can simplify occupation.
But this may increase capital cost.
Compare Capital Cost With Management Simplicity
Spending more initially to create genuinely independent units may reduce years of operational friction.
Service Charges May Become Necessary
If several tenants share:
- Estate lighting
- Gates
- Landscaping
the landlord may need a mechanism for recovering appropriate costs.
Lease drafting should reflect the management structure.
More Tenants Means More Administration
One 20,000 sq ft tenant means:
One rent payment.
Four 5,000 sq ft tenants mean:
Four rent payments.
Plus:
- Four leases
- Four insurance recharges
- Four sets of enquiries
Subdivision creates management intensity.
But It Can Reduce Income Concentration
There is another side.
With one tenant, if they leave:
100% of the property becomes vacant.
With four tenants, one leaving might create:
25% vacancy.
That can improve income diversification.
Multi-Let Estates Can Be Resilient
A spread of tenants across different sectors can reduce reliance on one business.
But tenant quality still matters.
Covenant Strength Should Not Be Ignored
Four tenants are not automatically safer than one.
Assess:
- Financial strength
- Trading history
- Lease terms
The quality of income matters.
Companies House Can Assist With Basic Checks
Official company information can be obtained from Companies House.
Additional financial due diligence may be appropriate.
Lease Terms Can Differ by Unit
One benefit of subdivision is flexibility.
Different units could potentially have different:
- Lease lengths
- Rent levels
- Review patterns
But a completely inconsistent estate can become complicated to manage.
Standardisation Can Help
Landlords may benefit from consistent approaches to:
- Payment dates
- Estate rules
- Insurance
subject to appropriate legal advice.
Think About Tenant Mix
Not every business makes a good neighbour.
Imagine placing:
- Quiet office occupier
next to:
- Noisy manufacturing operation.
Potential conflict is obvious.
Uses Should Be Compatible
Consider:
- Noise
- Smell
- Vehicle movements
- Working hours
when selecting tenants.
A Good Tenant Mix Can Strengthen an Estate
Complementary businesses can create a useful ecosystem.
For example:
- Contractors
- Trade suppliers
- Storage businesses
may work comfortably alongside one another.
Trade Counter Demand Can Influence Subdivision
Brands such as Screwfix, Toolstation and CEF demonstrate how important accessible trade-oriented property can be.
Independent trade businesses can have similar requirements on a smaller scale.
Front Units May Have Different Value
A unit facing the main road could be particularly suitable for:
- Trade counter
- Showroom
A rear unit might work better for:
- Storage
- Workshop
The building does not necessarily need to be divided equally.
Equal Size Is Not Always Optimal
A 20,000 sq ft property does not automatically need:
4 × 5,000 sq ft.
Local demand might support:
- 2,500 sq ft
- 3,500 sq ft
- 6,000 sq ft
- 8,000 sq ft
Let the market influence the layout.
Avoid Creating Awkward Leftover Space
A subdivision can sometimes leave one undesirable unit with:
- Poor access
- No loading
- Strange shape
Every resulting unit needs a clear purpose.
Retain Flexibility Where Possible
A clever subdivision might allow units to be:
- Let separately
- Combined later
This can broaden the future market.
Knock-Through Options Can Be Valuable
Where technically appropriate, designing separation with future flexibility can allow a growing tenant to expand.
Expansion Helps Tenant Retention
A business occupying 3,000 sq ft today may need 6,000 sq ft later.
If the neighbouring unit becomes available, the landlord may be able to retain that tenant.
Consider Phased Subdivision
The landlord does not always need to split the entire property immediately.
Perhaps one part can be separated first.
Test the Market
For example:
Phase 1: create two smaller units while retaining one larger unit.
This preserves flexibility.
Pre-Let Interest Can Reduce Risk
If credible applicants are willing to commit subject to works, this can provide stronger evidence before capital is spent.
Appropriate documentation and advice are essential.
Market During the Works
Do not necessarily wait until completion to begin marketing.
Use:
- Plans
- Specifications
- Progress photography
to generate interest.
But Be Clear About What Is Proposed
If the works are not complete, say so.
Do not present CGI or enhanced imagery as existing condition.
Give Realistic Completion Dates
Tenants may plan:
- Staff
- Equipment
- Existing lease expiry
around the promised date.
Unrealistic deadlines damage trust.
Construction Disruption Needs Management
If part of the building remains occupied during subdivision, consider:
- Dust
- Noise
- Access
- Safety
The existing tenant’s operation must be protected.
Existing Leases Can Restrict Works
If the building is partly occupied, check the landlord’s rights.
An existing tenant may have rights over:
- Access
- Yard
- Services
Legal advice may be necessary.
Do Not Accidentally Remove Tenant Rights
A proposed new unit may occupy land currently included in another tenant’s demise.
Check lease plans carefully.
Lease Plans Become More Important After Subdivision
Each unit should have a clear plan showing:
- Demise
- Access
- Parking
Ambiguity creates future disputes.
Give Units Logical Numbers
This sounds minor.
It is not.
A confusing estate with:
- Unit 1A
- Unit 1B Rear
- Unit 1B Upper Rear
can create problems for:
- Couriers
- Customers
- Emergency services
Plan the addressing properly.
Postal Addresses May Need Updating
New units can require formal addressing arrangements.
Deal with this before tenants begin trading where possible.
Security Needs to Work Independently
One large building may have had one:
- Alarm
- CCTV system
- Gate
Multiple occupiers may need a different arrangement.
Access Hours Need Clarity
If tenants operate different schedules, shared gates can become an issue.
Define how access works.
Insurance Arrangements May Change
Subdivision and multiple occupation can affect the property’s insurance profile.
Speak to the relevant insurance adviser before occupation.
Reinstatement Values Should Reflect the Altered Property
Significant building works may change:
- Construction
- Services
- Replacement cost
Insurance information should remain accurate.
EPC Requirements Need Consideration
Subdivision may affect energy-performance documentation requirements depending on the building and occupation.
Obtain appropriate advice.
Government information on non-domestic EPCs is available through GOV.UK.
UK Government – Non-Domestic EPCs
Assess the Roof Before Spending on Internal Division
This is an important commercial point.
Do not spend £150,000 subdividing a warehouse while ignoring a roof requiring £300,000 of work.
Understand the whole asset.
Prioritise Building Fundamentals
Before subdivision, investigate:
- Roof
- Structure
- Drainage
- Electrics
The new units need a sound building.
Refurbishment and Subdivision Can Work Together
If the property already needs refurbishment, this can be an efficient time to alter the layout.
Works might include:
- LED lighting
- New shutters
- Decoration
- Toilets
The property can emerge as a fundamentally different product.
Avoid Over-Specifying
Not every small industrial unit needs:
- Expensive offices
- Premium finishes
Understand the target occupier.
SMEs Often Value Practicality
They may prioritise:
- Clean warehouse
- Secure yard
- Power
- Parking
over decorative features.
Keep Rent Affordable
If refurbishment costs become excessive, the landlord may need a rent the local market cannot support.
Work backwards from achievable rent.
Build an Appraisal Before Starting
Model:
Existing scenario
Let as one unit.
Subdivision scenario
Let as several units.
Include:
- Works cost
- Professional fees
- Finance
- Void period
- Management
Then compare.
Do Not Use Asking Rents Alone
Nearby properties may be advertised at high rents but remain vacant.
Where possible, use evidence of actual transactions and current demand.
Speak to Agents Before Finalising the Layout
A local commercial agent can provide feedback on:
- Popular sizes
- Rent expectations
- Tenant enquiries
This can influence the scheme before money is committed.
Ask Existing Businesses
Neighbouring occupiers can also provide insight.
Perhaps several local companies need small expansion units.
That could support subdivision.
Think About the Exit Value
An investor may eventually sell the property.
A multi-let industrial investment could appeal to a different buyer profile from a single-let warehouse.
Income Diversification Can Be Attractive
Several leases can spread income risk.
But buyers will also assess:
- Management
- Lease lengths
- Tenant quality
Again, more tenants do not automatically mean more value.
Capitalisation Depends on Income Quality
The strongest subdivision creates:
More useful space + stronger demand + sustainable income.
Not simply:
More leases.
Keep Documentation Organised
After works, retain:
- Plans
- Certificates
- Warranties
- Utility information
Future buyers and tenants may request them.
Monitor Performance After Subdivision
Track:
- Enquiry levels
- Occupancy
- Achieved rents
- Tenant retention
This helps evaluate whether the strategy succeeded.
Learn From Each Unit
Perhaps 3,000 sq ft units let immediately while 8,000 sq ft units remain vacant.
That information can influence future asset-management decisions.
Do Not Keep Subdividing Forever
There is a point where smaller units create excessive:
- Management
- Parking pressure
- Common-area use
Optimisation is the objective, not maximum tenant count.
Sometimes the Best Decision Is Not to Split
After analysis, the landlord may conclude:
- Whole-unit demand is adequate
- Works cost is excessive
- Yard cannot support multiple occupiers
That is a perfectly valid outcome.
The purpose of the appraisal is to make the decision before spending the money.
Citrus Commercial Circle’s Market Insight
At Citrus Commercial Circle, we regularly deal with commercial properties where landlords have the option to:
- Let as a whole
- Split
- Offer flexible configurations
The right approach depends heavily on local demand.
A large industrial building can be a valuable asset.
But if almost every credible enquiry requires smaller space, subdivision deserves investigation.
The key is designing the property around how businesses actually operate.
That means considering:
- Loading
- Parking
- Power
- Access
- Services
rather than simply drawing lines across a floorplan.
Final Thoughts
Splitting a large commercial unit can create significant value.
It can potentially:
- Broaden tenant demand
- Reduce vacancy exposure
- Increase aggregate rent
- Diversify income
But subdivision also creates:
- Construction cost
- Management
- Technical complexity
The decision should therefore begin with evidence.
Ask:
What does the local market want?
Then ask:
Can this building provide it efficiently?
If both answers support subdivision, the project may create a stronger and more resilient commercial asset.
If they do not, preserving the larger unit may be the better strategy.
At Citrus Commercial Circle, we help landlords and investors across Bury and North Manchester assess commercial property demand, structure letting strategies and identify opportunities to reposition underperforming commercial assets.
Based in Bury. Active across North Manchester. Always on your side.
Call us today: 0161 383 1806
Email: info@citruscommercialcircle.co.uk
Visit: citruscommercialcircle.co.uk
Let’s unlock the full potential together.
Citrus Commercial Circle – Where standards meet success.
