Design Fees vs Construction Cost: Who Pays for What

Comprehensive service in Miami, meaning design plus construction management plus furnishings, is quoted at $200 to $350 per square foot all in.

If you want a single number to plan against, that is the one. A design fee alone tells you almost nothing about what the project costs, and the fee structures themselves are covered in detail separately.

Worth stating plainly, because this is the source of nearly every misunderstanding:

• Construction labour and materials
• Furniture, appliances and fixtures
• Municipal permits and permit expediting
• The structural engineer's letter your board requires
• Association review fees, $500 to $2,500
• Elevator deposits, $500 to $1,500
• Security deposits against common-area damage
• Freight, delivery, receiving, storage and installation of goods
• Any building-imposed cost such as a special assessment

Several of these are unavoidable in a tower and none belong to the designer.

The one owners get wrong most often: the designer does not control the construction cost. They influence it enormously through specification, but the price comes from the contractor.

Rough shape, not a rule:

Phase 1, design. Retainer to the designer. Concept, planning, preliminary drawings. This is where a flat fee of $5,000 to $15,000 typically sits for a luxury project.

Phase 2, documentation. Further design fee payments. Full drawings, specification, millwork detailing. Nothing has been built and nothing has been bought.

Phase 3, approvals and bidding. Board submission, permits, contractor bids. The first real construction number appears here, and this is the moment owners are surprised if nobody prepared them.

Phase 4, procurement. Deposits on long-lead items. Stone, custom millwork and imported furniture run months, so money leaves early.

Phase 5, construction. Contractor payments against progress. The largest outflow.

Phase 6, installation and closeout. Balance of furnishings, delivery, installation, final design fee payment, deposit returned.

The planning consequence: significant money leaves in phase 4, before anything looks different. Owners who budget as though spending starts with demolition find themselves short.

Ask them before signing anything.

1. Is this fee for design only, or does it include procurement and construction management? The single most important question in the entire process.

2. What is your estimate of total project cost, including construction and furnishings? A designer who has worked in your building can give you a range. If they will not estimate at all, that is worth noting.

3. Who purchases the furnishings, and what is the markup? If cost plus, ask whether trade discount is passed through.

4. What is excluded? Ask for it in writing. Permits, engineer's letter, association fees, freight, storage, installation.

5. How are revisions handled? Reasonable revisions included, substantial redirections billed, is the standard fair position. It should be written down.

The design fee is the smallest number and the one that most affects the other two. A well-specified project avoids rework that costs more than the entire fee.

Every discussion of budget assumes the project goes as planned. The agreements that matter most are the ones nobody reads until it does not.

Damage during construction. The contractor carries general liability insurance, and in a condominium the association will require a certificate naming the association as additional insured before work starts. If a crew damages a corridor or floods the unit below, that is the contractor's insurance, not yours and not the designer's. This is the single strongest argument for verifying insurance before mobilisation rather than after: an uninsured contractor transfers the entire risk to you silently.

Damage to goods in transit or storage. This one surprises owners. Furniture damaged in freight is a claim against the freight carrier, and the window to file is short. If the designer manages procurement, they handle the claim. If you purchased directly, you handle it, and you discover the deadline at the moment you miss it. Receiving goods at a professional warehouse rather than the job site exists for precisely this reason: inspection happens on arrival, when a claim is still possible.

Defective work. The contractor warrants their labour, typically for a defined period after completion. Manufacturers warrant their products. Neither warrants a decision you insisted on against advice, which is why written advice matters more than it seems at the time.

Specification errors. If a drawing is wrong and the wrong thing gets built, that is the designer's error and reputable firms correct it. The practical question is not whether they will, it is whether the error is discoverable before the tile is set. This is what construction administration buys, and it is why excluding it to save fee is frequently a false economy.

The building's own failures. A special assessment, a leak from the unit above, a structural repair the association orders mid-project. None of these belong to anyone on your team, and all of them can stop your work. This risk is carried entirely by the owner, and it is the strongest reason to hold contingency rather than spend it early.

Almost every serious dispute in a renovation traces back to something agreed verbally and remembered differently. Five documents prevent nearly all of them, and none is difficult to obtain.

The signed scope, with exclusions. Discussed above and worth repeating because it is the foundation. Everything else refers back to it.

Approved drawings, dated. The version the contractor builds from must be identifiable. "The latest set" is not a version. When a question arises about whether something was in scope, a dated drawing answers it in seconds and a memory does not.

Written change orders, before the work. Every change priced and approved in writing before it is executed. This is the discipline owners most often skip because it feels bureaucratic mid-project, and it is the one that most reliably prevents an invoice nobody expected.

The board approval letter. Keep it. It states what was approved, and boards change composition. A new board that questions completed work is answered by the letter the previous board issued.

Delivery and inspection records. Photographs at receiving, noted damage, dates. This is what makes a freight claim possible and what settles the question of whether a scratch arrived or was created.

None of this requires an adversarial posture. It is ordinary project hygiene, and on a well-run project you will never look at most of it. The documents exist for the project that does not go as planned, and you cannot create them retroactively once the disagreement has already started.

Every figure above holds for a house. In a tower, a layer of cost sits on top that has nothing to do with design or construction quality, and it is the layer owners never budget for.

Access is metered. The service elevator is booked in slots. Most buildings restrict work to weekday business hours, which means a crew of four sits idle if the elevator was booked by another unit. That is paid labour producing nothing, and it lands in the construction number.

Protection is mandatory. Corridors, elevator cabs and lobbies must be protected before anything moves. It is a real cost, it is charged to you, and it appears in no cost guide written for houses.

Deposits are held, not spent. Elevator deposits and common-area damage deposits are returned if nothing is damaged, but they leave your account at the start and sit there for the duration of the project. Money you cannot use is a cash flow problem even when it is not an expense.

Review has a fee and a calendar. Association review costs money and, more importantly, costs time. A board that meets monthly can add weeks; a board that meets quarterly can reshape your entire schedule.

The structural letter is yours. The engineer's letter your board requires is an owner cost. The designer and contractor coordinate it. Neither pays for it.

This is the reason the same apartment costs materially more to renovate than the equivalent square footage in a house, and why cost guides written for houses under-budget tower projects every time.

Nobody prices delay into a budget, and delay is where budgets die. It is worth knowing which delays cost money and which only cost patience.

Delays that cost real money. A crew mobilised for a start date that slips is a crew you may pay to hold or lose to another project. Long-lead goods that arrive before the space is ready go into storage, and storage is billed monthly. A permit that expires has to be repulled.

Delays that mostly cost time. Waiting for a board meeting. Waiting for a decision you have not made. These are frustrating and they are not, by themselves, expensive, which is exactly why they are underestimated: nothing hurts until the cumulative slip pushes you into a season where the building restricts work, or pushes a long-lead order past a price increase.

Who absorbs what. The contractor holds the schedule and absorbs the consequences of their own sequencing errors. The owner absorbs delays caused by decisions not made, because no contract in this industry makes a designer or contractor responsible for an owner's indecision. The designer absorbs rework caused by their own documentation errors.

The practical protection is to make the slow decisions early. Stone, custom millwork and imported furniture are the long-lead categories. Deciding them in phase two rather than phase four removes the most common cause of expensive delay, and it costs nothing to decide early except the discomfort of committing.

A fair question, since the design fee is a real number and skipping it is a real option. It is the right choice for some projects. Here is what actually changes.

The specification work does not disappear, it moves. Someone still selects every finish, fixture, tile, stone, paint colour and piece of hardware, and resolves how they meet each other. Without a designer, that person is you or your contractor. A contractor is good at building and is not paid to spend three weeks resolving a millwork detail.

The decisions arrive out of order. The single most expensive pattern in renovation is deciding late what should have been decided early. Choosing a freestanding tub after the plumbing is roughed in is a change order. Choosing it in design is a line in a schedule.

Nobody holds the whole. Individually reasonable decisions made two weeks apart produce a room that does not resolve. This is the failure owners describe as "it looks fine but it does not look finished", and it is almost always a coordination failure rather than a taste failure.

Where skipping the designer genuinely makes sense: a cosmetic refresh, a single room, or a project where you already have a clear and consistent vision and the scope does not touch layout, plumbing or millwork. There is no honour in paying for coordination that a project does not need.

Where it usually costs more than it saves: anything that touches layout, anything in a building with a review board, and anything where long-lead goods and construction have to be sequenced against each other. In those projects, the fee is frequently smaller than the rework it prevents.

Owners bring every cost question to the designer, including the ones only the contractor can answer. Directing them correctly is the fastest way to get a real number.

"Is this a fixed price or an estimate?" The distinction is everything. A fixed price transfers risk to the contractor and is priced accordingly. An estimate is a forecast, and the final figure is whatever the work turns out to require. Both are legitimate. Confusing them is how an owner ends up feeling misled by a number nobody promised.

"What allowances are in this number?" An allowance is a placeholder for something not yet selected: a tile allowance, a plumbing fixture allowance. If the allowances are low, the bid looks competitive and the final cost is not. Comparing two bids without comparing their allowances compares nothing.

"What is excluded?" The same question that matters on the design proposal matters here, and for the same reason. Permits, protection, debris removal, after-hours labour, association fees.

"How are change orders priced?" Agree the mechanism before there is a change, because negotiating it afterwards is negotiating from the weakest possible position: work has stopped and you need it to restart.

"What in this scope worries you?" The most useful question in the entire process and the one almost nobody asks. An experienced contractor has walked the building, seen the risers and knows where the surprises live. Asking directly is the cheapest risk assessment available, and the quality of the answer tells you what kind of contractor you are hiring.

The pattern underneath all five: the designer owns the specification, the contractor owns the price and the means. Asking each of them what they actually control produces answers you can plan against.

The structure does not. Three budgets, three parties, the same order of payment. What changes is the building stock, and that changes which of the three dominates.

Broward has a higher proportion of low and mid-rise buildings and waterfront single-family homes than the Miami condominium market. In a low-rise, the tower access costs described above largely disappear: no service elevator to book, no elevator deposit, less corridor protection. That removes a layer of construction cost that has nothing to do with finish quality.

Waterfront homes move the weight in the other direction. Exposure drives specification toward materials and hardware that survive salt air, and the furnishings budget carries more of the total because there is simply more square footage to furnish.

The practical takeaway for an owner comparing the two markets: do not assume a per square foot figure travels between them. Ask what the number assumes about the building, and read it against the property you actually own.

Want to know what your project actually costs, all in?

Tell us the building, the approximate square footage, and whether you are furnishing, renovating or both. We will lay out the three budgets so there are no surprises at bid stage.

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Figures are published market ranges for South Florida gathered in 2026, not any single firm's pricing. Jorge Castillo Design offers both hourly and flat rate design fees.

Jorge Castillo Design designs high-end residential interiors across South Florida.