Once you start collecting proposals, you may notice they do not all use the same pricing method. Some offer a single set price. Others bill actual costs plus a fee. Understanding DADU contract pricing helps you compare these approaches on equal terms.

Each structure handles risk, changes and paperwork differently. Neither one is right for every homeowner or every project. The better fit depends on your plans, your comfort with uncertainty and how you like to track spending.

This article explains both approaches in plain language. It is general information, not legal advice. Before signing any construction contract, consider asking a qualified attorney to review it.

What a Fixed Price Contract Means

Under a fixed price contract, the builder agrees to complete a defined scope for a set amount. You know the total for that scope before work begins.

In general, this approach works best when the plans and specifications contain plenty of detail. The clearer the scope, the more confidently a builder can price it. However, anything outside that scope usually becomes a change with its own price.

Because the builder carries more of the cost risk, the price may include room for that risk. In return, the owner gains a clearer starting number.

What a Cost Plus Contract Means

Under a cost plus contract, you pay the actual cost of the work plus a fee for the builder. Depending on the agreement, the fee might be a flat amount or a percentage.

In contrast, this approach offers more visibility into what things really cost. It can also allow work to start while you still decide on some details. On the other hand, the final total is less certain at the outset.

For this reason, some cost plus agreements add a cap or a target figure to limit that uncertainty. The terms vary widely, so read them closely.

How DADU Contract Pricing Handles Changes

Changes happen on almost every project. The way a contract manages them matters as much as the starting price.

In a fixed price contract, written change orders usually manage changes. Each change order describes the new work and its price, and both parties sign before the work proceeds.

In a cost plus contract, changes may simply flow into the running cost. Even so, a good agreement still records changes in writing. That way, you can see how each decision affects the total.

Allowances in DADU Contract Pricing

Both contract types often use allowances for items you have not selected yet. Tile, fixtures, lighting and appliances are common examples.

In a fixed price contract, the allowance is a placeholder inside the set price. If your final choice costs more or less, the contract explains how to handle the difference. In a cost plus contract, the actual cost simply becomes part of the bill.

Either way, realistic allowances prevent unpleasant surprises. Our guide to how finish allowances work covers this topic in more depth.

Documentation and Transparency

Good records help any contract work well, whichever structure you choose. They also make it easier to resolve questions before they grow.

• Scope documents. Plans, specifications and a clear list of inclusions and exclusions.
• Payment schedule. When payments are due and what work each one covers.
• Change records. Signed change orders or a written change log.
• Cost backup. For cost plus work, invoices and receipts that support each charge.

Washington’s Department of Labor and Industries also recommends that you put the agreement in writing and understand its terms. Its guide to hiring a contractor covers other helpful steps too.

Payment Schedules and Cash Flow

Pricing structure also shapes how money moves during the project. A fixed price contract often ties payments to milestones, such as foundation, framing or final completion. As a result, you can plan cash flow around those stages.

A cost plus contract may bill at regular intervals based on actual costs. Therefore, payment amounts can vary from one period to the next. If you use a construction loan, your lender may also set its own draw process.

In either case, ask for a written schedule before work begins. That way, you know when each payment is due and what it covers.

Weighing Tradeoffs in DADU Contract Pricing

Of course, it is natural to want a simple answer about which approach is best. In reality, each one fits different situations.

A fixed price structure may appeal to owners who value a clear starting number and have detailed plans. A cost plus structure may appeal to owners who want more visibility and expect to make decisions as work progresses. Many projects also use a blend of both ideas.

Ultimately, the key is to match the contract to your project and your priorities. Then make sure the terms are clear and fair to both sides.

Questions to Ask Before You Sign

Before you sign, ask the same core questions so you can compare proposals fairly.

• What exactly does the scope include, and what does it leave out?
• How do you request, price and approve changes?
• How does the builder set allowances, and what happens if selections differ?
• Who holds the contingency, and who decides when to release it?
• What records will you receive, and how often?

Our articles on reading a construction estimate and planning a contingency reserve can help you prepare for these conversations.

Choose Clarity Over Labels

In the end, the label on a contract matters less than the details inside it. Clear scope, honest allowances and a sound change process protect both sides.

With a solid grasp of DADU contract pricing, you can read proposals with more confidence. Take your time, ask questions and seek professional review where needed before you commit.