Construction and trades businesses can be excellent acquisitions — established local reputation, recurring work, skilled teams and strong demand. They can also be difficult to value and even harder to transfer if the records are poor, the subcontractors are informal and the owner is the business. This guide explains what to prepare, what buyers will check and how to present a trades business that sells well.
Contents
What makes selling a construction or trades business different?
Construction and trades businesses come in many forms — sole traders with a van and a phone, small specialist firms with a team of skilled workers, and larger general contractors with multiple projects running simultaneously. But they share a common set of challenges when it comes to selling.
Owner dependency is the biggest.In many trades businesses, the owner is the estimator, the quality checker, the main customer relationship and sometimes the most skilled operative on site. Buyers see this and price it — often heavily.
Tax compliance is more complex.The Construction Industry Scheme (CIS), the domestic reverse charge for VAT in construction, and the correct treatment of subcontractors versus employees all create potential liabilities that buyers' accountants will scrutinise carefully.
Revenue can be lumpy.Unlike a subscription business or a retail shop with daily sales, construction revenue often comes in large project-based payments with gaps between jobs. Demonstrating maintainable profit — not just peak-year revenue — takes more preparation.
Subcontractors add complexity.Many trades businesses use self-employed subcontractors, and the legal and tax position of those arrangements is a major due diligence area. Misclassified workers, incorrect CIS deductions or underpaid tax represent real financial risk that a buyer will want to understand before committing.
What a buyer may be acquiring:
Local reputation and goodwill built over years of quality work
Repeat clients and referral relationships
A team of skilled employees or reliable subcontractors
Accreditations, certifications and regulatory registrations
Vehicles, tools and plant — some owned, some financed
A pipeline of quoted, committed or potential work
Customer contracts and warranty obligations
A trading name, phone number, website and online reviews
Accounting, job-costing and project management systems
Each of these elements requires preparation and documentation before a sale can proceed smoothly.
When is the best time to sell?
The best time is when the business can demonstrate consistent, maintainable profit that does not depend entirely on the owner's personal presence.
Conditions that support a strong sale:
Accounts are clean and current over at least two to three years
Revenue is stable or growing, with understandable seasonal patterns
CIS compliance is current — deductions made correctly, returns filed
VAT domestic reverse charge is applied correctly where it applies
Job-costing records show a clear picture of margins by project type
Subcontractor arrangements are formally documented and correctly classified
Vehicles and tools are listed and in good condition
Insurance is current — public liability, employers' liability, professional indemnity if relevant
Health and safety records are organised — method statements, risk assessments, COSHH records
Key staff or subcontractors are likely to stay
Customer relationships are not entirely personal to the owner
Pipeline is visible and can be evidenced
Consider preparation before marketing if:
The owner manages and estimates all jobs personally
CIS records are behind or incorrect
VAT reverse charge has not been applied correctly
Subcontractors are paid cash without proper documentation
Job-costing is not tracked at project level
Vehicles are owned personally rather than by the business
Key tools or plant are on finance that is not reflected in the accounts
Health and safety records are thin or missing
Warranty or disputes are unresolved
The business has no written agreements with its main clients
A period of twelve months to two years of preparation — cleaning records, formalising arrangements, documenting procedures and reducing owner dependency — can significantly improve both the sale price and the ease of transaction.
How valuation works
Construction and trades businesses are typically valued onadjusted EBITDA— maintainable earnings before interest, tax, depreciation and amortisation — with a multiple applied to reflect the risk and opportunity profile of the business.
Calculating adjusted EBITDA
The seller's accountant should prepare an add-back schedule that removes:
One-off items (a particularly good or bad year's performance, extraordinary costs)
Owner's salary adjusted to a market-rate equivalent for their role
Owner's personal expenses run through the business
Depreciation (added back, then replaced with a capital expenditure assessment)
Interest on business loans (added back for the EBITDA calculation)
What remains is the maintainable earnings of the business — the profit a competent operator would expect to generate year on year.
Factors that affect the multiple
Increase value:
Consistent profit over multiple years
Low owner dependency — management and operational decisions are delegated
Repeat clients and long-standing relationships that are not personal to the owner
Written customer agreements or framework contracts providing revenue certainty
Skilled, stable staff or subcontractors who are likely to continue
Clear job-costing records showing consistent margin by work type
Good accreditations — Gas Safe, NICEIC, CHAS, Constructionline, ISO, etc.
Well-maintained vehicles and tools with clear ownership
Clean CIS and VAT compliance records
Strong health and safety record
Visible and credible pipeline
Reduce value:
Heavy owner dependency on technical, estimating or client management work
Lumpy revenue with no contracted backlog
CIS non-compliance or incorrect VAT treatment
Poor or missing job-costing
Subcontractors who may be misclassified as self-employed
Significant outstanding finance on vehicles or plant
Unresolved disputes, warranty claims or defects
Health and safety gaps
Short lease on premises (if premises are relevant to the business)
Customer concentration — one or two clients providing most revenue
Financial information to prepare
Prepare the following before marketing:
Three years of filed accounts— profit and loss, balance sheet, directors' or self-assessment returns
Current year management accounts— year to date versus prior year
Revenue by project type or work category— e.g. new build, refurbishment, reactive maintenance, planned maintenance, commercial, residential
Job-costing reports— margin by project, showing labour, materials and subcontractor costs
Work in progress (WIP) schedule— jobs started but not yet invoiced, and where they stand
Pipeline report— quoted work, committed work, likely conversions
CIS records— monthly returns, deductions made and suffered, contractor/subcontractor position
VAT returns— including domestic reverse charge treatment where applicable
Payroll records— staff numbers, roles, pay rates, pension, employer NI
Subcontractor payments— totals, frequency, CIS deduction records, employment status evidence
Vehicle and plant schedule— owned, leased or financed, with outstanding balances
Tool and equipment list— significant items with ownership and condition noted
Insurance premiums and claims history
Aged debtors— outstanding invoices and any bad debt history
Aged creditors— supplier and subcontractor balances
Add-back schedule— owner salary, owner vehicle, one-off items
Key metrics to know
Average monthly revenue— and seasonal variation
Average project margin— gross profit after direct labour, materials and subcontractor costs
Revenue concentration— top five clients as a percentage of total
WIP position at any given time— how much contracted work is outstanding?
Debt collection period— how long does it take to get paid?
Owner hours— how many hours does the owner personally work, and what are they doing?
Sector-specific checks
CIS (Construction Industry Scheme)
CIS is one of the most scrutinised areas of a construction business due diligence. Buyers and their accountants will check:
Whether the business is registered as a contractor under CIS
Whether it is registered as a subcontractor under CIS
Whether monthly CIS returns have been filed on time
Whether deductions have been made correctly from subcontractor payments
Whether verification checks have been carried out on subcontractors
Whether CIS suffered (deductions from the business's own income) is reflected correctly in accounts and tax returns
Whether any CIS penalties or notices have been issued by HMRC
CIS non-compliance can create significant tax liabilities — for both uncollected deductions and penalties. Buyers will want assurances (often backed by solicitor warranties or price retention) that the CIS position is clean.
VAT domestic reverse charge
The domestic reverse charge for construction services has applied since March 2021. It changes who accounts for VAT on certain construction services — the customer accounts for the VAT rather than the supplier.
It applies to:
Construction services that are within the scope of CIS
Supplies made to VAT-registered customers who are also in the construction industry
It does not apply to:
Supplies to end users (e.g. homeowners)
Supplies to connected companies in certain circumstances
Zero-rated supplies
Buyers and their accountants will check that the reverse charge has been applied correctly throughout the business's trading history. Errors — in either direction — can result in HMRC assessments and penalties that become a buyer's inherited risk.
Prepare:
VAT returns showing how reverse charge supplies have been reported
A brief explanation of which customers are treated as end users versus contractors
Accountant confirmation of the business's approach and any HMRC correspondence
Job-costing reports
Job-costing is the practice of tracking the actual cost of each project (labour, materials, subcontractors, plant) against the estimated cost. It answers the question: did we make the margin we expected on this job?
Buyers will want to see:
Whether the business has a job-costing system at all
How many projects are tracked
What the average margin by project type looks like
Whether margin has been consistent or whether certain project types are consistently loss-making
How the system works — is it a spreadsheet, a project management tool, or accounting software integration?
A business with no job-costing is hard to value with confidence, because there is no way to know which work is profitable and which is not.
Pipeline and work in progress
A buyer is paying for future earnings as much as past earnings. Show:
Committed work— signed contracts or purchase orders for future projects
Quoted work— outstanding quotes or tenders, with estimated conversion rates
Recurring relationships— clients who reliably return for repeat work
Seasonal patterns— when does work slow down and why?
A business with a visible pipeline of contracted work is significantly more attractive than one where the next job is always uncertain.
Accreditations and certifications
Construction and trades businesses often hold valuable accreditations that affect both their ability to win work and their attractiveness to buyers. Common ones include:
Gas Safe— required for gas work; check whether registration is in the company name or individual names
NICEIC or NAPIT— for electrical contractors
REFCOM— for refrigeration and air conditioning
CHAS— Contractors Health and Safety Assessment Scheme
Constructionline— pre-qualification for larger contracts
ISO 9001, ISO 14001, ISO 45001— quality, environment and health/safety management systems
Safe Contractor, SSIP schemes— health and safety pre-qualification
Chartered Institute of Building (CIOB)or other professional body membership
Check for each accreditation:
Is it held by the company or an individual?
Does it need to be renewed, and when?
What is the process if it needs to transfer to a new company?
Some accreditations — particularly Gas Safe registration — are personal to the individual operative, not the company. A buyer who is not themselves Gas Safe registered cannot simply take over a Gas Safe business and continue without individually registered engineers.
Staff, subcontractors and TUPE
Employed staff
Prepare:
Staff list — roles, hours, pay rates, start dates
Written employment contracts
Holiday entitlement and accrued liabilities
Pension auto-enrolment records
Qualifications — trade, health and safety, CSCS cards
Right-to-work records
Training records
TUPE position — in most asset sales of a going-concern business, employed staff transfer on their existing terms
Subcontractors
Subcontractor arrangements are a major due diligence focus in trades business sales.
Buyers will check:
Whether subcontractors are genuinely self-employed or whether HMRC might classify them as workers or employees
Whether CIS deductions have been applied correctly and records are maintained
Whether written subcontractor agreements exist
Whether subcontractors have their own public liability insurance
Whether they hold the relevant qualifications and CSCS cards for the work they carry out
Whether they have their own UTR numbers and are registered with HMRC
Whether there are any outstanding disputes or payment issues
Misclassified workers — people who are economically dependent on the business, work under direction, use the business's tools and wear its uniform, but are treated as self-employed for tax purposes — represent real HMRC risk. If this is discovered during due diligence, a buyer will either seek a significant price reduction or walk away.
Vehicles, tools and equipment
Vehicles
Vehicles are often a significant asset in a trades business and one of the most complex to transfer cleanly.
Prepare:
List of all vehicles — make, model, year, registration
Ownership status — company owned, personally owned (and expensed to the business), leased or on finance
Outstanding finance balances for each vehicle
MOT and service history
Insurance arrangements — whether each vehicle is on a fleet policy
Whether vehicles are branded
Whether included in the sale price
Vehicles owned personally by the sole trader or director that are used in the business but not in the company name need particular attention. A buyer will want clarity on what they are actually acquiring.
Tools and plant
Prepare:
A list of all significant tools and plant — power tools, specialist equipment, scaffolding (if owned), access platforms, generators, compressors
Ownership status — owned outright, hired long-term, or subject to a finance agreement
Outstanding finance balances
Age and condition
Whether included in the sale
For smaller hand tools, an estimated aggregate value is usually sufficient. For plant worth more than a few thousand pounds per item, specific documentation is expected.
Insurance, health and safety
Insurance
Prepare current documents and renewal schedules for:
Public liability insurance— typically £2–10 million depending on the type and scale of work
Employers' liability— legally required for any business with employees; minimum £5 million
Professional indemnity— relevant for design-and-build, surveying, consulting, or where the business provides any professional advice alongside its trade work
Contractors' all-risks— covering materials, works in progress and plant on site
Vehicle/fleet insurance— business use cover for all company vehicles
Tool and equipment insurance— if relevant
Claims history— any claims in the past five years, including settled and declined
Health and safety
Construction is one of the higher-risk sectors for health and safety incidents, and buyers' due diligence will reflect this.
The Construction (Design and Management) Regulations 2015 (CDM Regulations) impose specific duties on contractors and principal contractors. Ensure:
Health and safety policy— required for businesses with five or more employees
Risk assessments and method statements (RAMS)— prepared for each project type
COSHH assessments— for any hazardous substances used (adhesives, solvents, dust-producing work)
Site induction records— evidence that workers are briefed on site-specific risks
Accident book— all incidents recorded
RIDDOR reports— any reportable incidents filed with the HSE
CSCS cards— evidence that all operatives hold the relevant construction skills certification scheme card
Asbestos awareness training records— relevant for any work on pre-2000 buildings
First aid arrangements— trained first aiders, equipment
Equipment inspection records— particularly for plant, lifting equipment (LOLER) and pressure systems
Customer contracts and pipeline
Customer relationships in a trades business often exist without formal written contracts. Most residential work proceeds on a quote accepted by email or verbal agreement, and some commercial relationships operate on the same basis.
Buyers will want to understand:
Which relationships are formal and documented (written contracts, framework agreements, purchase orders)
Which relationships are strong but informal (repeat clients, loyal referrers)
Which relationships are personal to the owner — clients who call the owner's mobile directly and would be lost if the owner left
Prepare:
A summary of the top 10–15 clients by revenue, showing annual value and relationship tenure
The nature of each relationship — is it project-by-project, retainer, framework or ad hoc?
Any written contracts or framework agreements, and their transferability
Any warranty obligations still running on completed work
Any disputes, defects or complaints currently unresolved
Confidentiality and data protection
Do not share sensitive information too early. Before an NDA:
Share only headline revenue range, profit range, business type, staff headcount and broad location
Do not share client names, project details, subcontractor identities or pricing
After an NDA and buyer screening:
Share management accounts, job-costing summaries and pipeline report
Share the vehicle and equipment list
Share accreditation overview
After heads of terms:
Share full accounts, CIS records, VAT returns, staff details, subcontractor records, client contracts, insurance, health and safety records
Client and subcontractor data is personal data under UK GDPR. Do not share names, contact details or financial information with buyers without appropriate data protection controls.
How to write a strong listing
A strong listing for a trades business is specific without revealing confidential information.
Include:
Trade type (e.g. electrical, plumbing, groundworks, general building, M&E, specialist)
Broad location and geographic coverage area
Years of trading history
Revenue range and profit summary
Staff/subcontractor overview (numbers, key skills — no names)
Accreditations held (company-level, not individual if it would identify someone)
Vehicle and equipment overview
Customer profile (commercial, residential, public sector — no client names)
Pipeline summary if it is strong
Reason for sale
Growth opportunities
Handover and transition support
Confidentiality and screening process
Example listing paragraph
Established building and refurbishment contractor operating across a strong regional market, with a skilled team of employed tradespeople, a growing commercial client base and consistent repeat work. The business holds relevant industry accreditations, operates a modern vehicle fleet and has clear opportunities to grow through expanded commercial tendering and digital marketing. Further financial, accreditation, staff and client information is available to serious buyers after screening and confidentiality checks.
Seller checklist
Three years of filed accounts available
Current year management accounts prepared
Revenue by project type understood
Job-costing reports prepared — margin by project type
WIP schedule prepared
Pipeline report prepared — committed and quoted work
Add-back schedule prepared
CIS returns filed and records organised — deductions made and suffered
VAT returns prepared — domestic reverse charge treatment documented
PAYE records organised
Subcontractor payments and CIS deduction records organised
Subcontractor employment status assessed — self-employment position documented
Subcontractor agreements reviewed — written and formalised where possible
Staff list, contracts, qualifications and hours prepared
CSCS cards and trade qualifications documented
TUPE position understood — employment advice taken
Accreditations listed — company vs individual, renewal dates, transfer process
Gas Safe, NICEIC or other individual registrations identified and documented
Vehicle list prepared — ownership, finance, condition, MOT, insurance
Tool and plant list prepared — ownership, finance, condition
Public liability insurance prepared — current certificate and claims history
Employers' liability insurance prepared
Professional indemnity insurance prepared (if applicable)
Health and safety policy prepared
Risk assessments and method statements organised
COSHH records prepared
Accident book and RIDDOR records available
Client contract summary prepared — top clients, revenue, relationship type
Warranty obligations documented
Unresolved disputes or defects disclosed and managed
Handover plan drafted
NDA and buyer screening process ready
FAQs
What is the biggest risk in selling a trades business?
The biggest risk is usually owner dependency — a buyer discovering that the business is held together by the seller's personal relationships, technical skills and reputation, with no real system underneath. Address this before marketing by delegating, documenting and reducing personal involvement in client-facing work.
Does CIS non-compliance affect the sale?
Yes, significantly. CIS errors — whether incorrect deductions, missed returns or misclassification of subcontractors — represent real HMRC liability. A buyer's accountant will check CIS records thoroughly, and any gaps will either reduce the price or cause the buyer to walk away.
Does TUPE apply to construction staff?
In most asset sales of a going-concern construction business, yes. Employed staff transfer to the buyer on their existing terms and conditions. Self-employed subcontractors are not covered by TUPE, but their continued availability is critical to the business and should be part of the handover plan.
Can accreditations transfer with the business?
It depends on the accreditation. Company-level accreditations (CHAS, Constructionline, ISO) may transfer or be re-certified to the new owner relatively straightforwardly. Individual-level accreditations (Gas Safe, NICEIC) are personal to the operative and do not transfer. A buyer who is not individually registered cannot simply take over a Gas Safe registered business.
Do I need specialist advice?
Yes. A construction business sale involves CIS, VAT reverse charge, employment status, TUPE, accreditation transfer and health and safety — all of which benefit from specialist accountancy and legal advice alongside general business sale expertise.
Key takeaways
Owner dependency is the single biggest value risk in a trades business — reduce it before marketing.
CIS compliance and VAT domestic reverse charge treatment are high-priority due diligence items; clean records are essential.
Job-costing records demonstrate margin visibility and give buyers confidence in the profitability of different work types.
Individual-level accreditations (Gas Safe, NICEIC) do not transfer — identify which registrations are personal and plan accordingly.
Subcontractor arrangements must be correctly documented — misclassification risk is a real buyer concern.
Vehicles and plant need a clear ownership and finance schedule.
Pipeline visibility — committed and quoted work — materially supports the sale price.
A written handover plan covering client relationships, accreditations, staff and systems is essential.
Related resources
Important disclaimer
Buy a Business Ltd is a marketplace, not a broker. Information, guides, checklists and examples on this site are for general guidance only and do not constitute legal, tax, financial, investment, valuation, employment, licensing, health and safety, data protection, brokerage or regulated advice.
Buying or selling a business involves risk. You should seek independent professional advice before buying, selling, valuing, financing or completing a business purchase.
Sources and useful references
GOV.UK: CIS — Construction Industry Scheme
GOV.UK: VAT domestic reverse charge for building and construction services
HSE: CDM Regulations 2015
GOV.UK: Gas Safe Register
Companies House: Get information about a company
ICO: Data sharing due diligence