Capacity planning: how much work can you actually take on
Most building firms answer "can you fit us in?" with a feeling. The feeling says yes, because saying no to work is painful. Then three jobs collide in October, quality slips, a client is let down, and the winter pipeline is empty because nobody quoted while everyone firefought. Capacity is a number. Here is how to know yours.
Why gut feel fails at exactly the wrong moment
Gut feel works when you are small enough to hold every job in your head. It breaks the moment there are two crews, a dozen live enquiries and jobs that each run eight to twelve weeks. The failure is always in the same direction: builders overcommit, because the cost of saying no is immediate and visible, while the cost of overbooking arrives months later, spread across late finishes, weekend working, rushed snagging and a reputation dent you cannot invoice for.
The fix is not heroic scheduling software. It is one honest unit of measurement: the crew week.
Count your crew weeks
A crew week is one crew working one week. A firm with two crews has, on paper, 104 crew weeks a year. In practice it has far fewer, and the gap is where overbooking hides:
| Line | Two-crew example |
|---|---|
| Paper capacity, 2 crews x 52 weeks | 104 crew weeks |
| Holidays, bank holidays, sickness | minus 12 |
| Weather, drying time, inspection waits | minus 8 |
| Snagging, callbacks, warranty visits | minus 5 |
| Moves between sites, setup, strike-down | minus 4 |
| Realistic sellable capacity | about 75 crew weeks |
As a rule of thumb, realistic sellable capacity lands around 70 to 80 percent of paper capacity for most small firms. Plan at 100 percent and every small delay cascades into every following job. The buffer is not slack, it is shock absorption.
Price jobs in crew weeks, not just pounds
Every quote you send is a claim on future capacity, so every quote should carry two numbers: the price, and the crew weeks it consumes. A £60,000 extension at ten crew weeks and a £18,000 refurb at two crew weeks are different animals: the refurb earns less but fills awkward gaps; the extension pays more but swallows a whole crew for a season.
This is easier when your quotes are built from measured quantities, because labour hours fall out of the bill naturally. A proper bill of quantities, the kind QS Quoter generates from a description or drawings at your own rates, is effectively a duration estimate wearing a price tag: the labour lines tell you the crew weeks before you commit to them. Programme length also feeds back into the price itself, a loop we cover in how programme length quietly changes your price.
Match the pipeline to the capacity
Once you know sellable crew weeks, the quoting pipeline stops being "quote everything, hope for the best" and becomes a supply line you can steer:
- Work out your win rate. If you win roughly one quote in three, filling 20 crew weeks of forward work needs about 60 crew weeks of live quotes out.
- Keep quoting when you are busy. The empty-January problem is caused in September, when firms stop quoting because they are flat out. Quote for start dates, not for now. Fast quoting matters here: a twenty-minute quote is one you will still send in a busy week, which is the argument of first back wins.
- Sell the start date honestly. "We can start in February, and here is a proper measured quote today" beats a vague "we're pretty booked". Serious clients wait for builders who look organised. The quote arriving fast while the start date is far away is exactly the combination that signals a well-run firm.
- Say not yet, rather than yes to a collision. Overbooking punishes your best clients, the ones already signed, to please a stranger.
A simple monthly capacity review
This does not need software to start. One page, once a month:
- Crew weeks already committed for the next six months, from signed jobs.
- Sellable crew weeks over the same window.
- The gap, in crew weeks and in start-date terms.
- Live quotes out, converted to expected crew weeks using your win rate.
- Decision: quote harder, hold steady, or raise prices because demand exceeds capacity.
That last option deserves emphasis. When the pipeline consistently overfills your capacity, the correct response is usually not a third crew, it is higher margins on the same two. Growth in headcount multiplies risk; growth in margin multiplies sleep. Larger firms juggling several estimators and dozens of live quotes usually need this wired into their systems properly. That is the point where an installed estimating and pipeline setup pays for itself, which is what AGMM builds for commercial clients: the shape of that engagement is on the commercial page.
The blunt summary
Capacity planning for a building firm is three honest numbers: sellable crew weeks, crew weeks committed, and crew weeks in the quote pipeline adjusted for win rate. Keep the first ahead of the second, keep the third topped up even in busy months, and treat every quote as a claim on your calendar, not just an invoice-in-waiting. Firms that know these numbers say no rarely, but they say it at the right moments, and that is what keeps quality, clients and cash flow intact.
Put capacity thinking inside your estimating
AGMM installs commercial estimating systems inside building firms: discovery call, business case, install, pilot. Onboarding 2,000 to 10,000 GBP by scope, plus 10 percent of tracked value created.
Book a discovery call