Bathroom Remodel Buying Guide: What to Buy and When

How do you plan a bathroom remodel from scratch?

A bathroom remodel looks deceptively simple on a mood board. In practice it is a sequenced construction project where every product selection creates downstream constraints. The toilet you choose affects vanity clearance. The vanity depth affects door swing. The shower niche placement is locked the moment tile goes on the wall. Getting this sequence right the first time is the difference between a smooth eight-week renovation and a three-month ordeal with multiple trips to the plumbing supply house.

This guide walks through every major purchasing decision in the order you need to make it, with the specifications and certifications that actually matter according to published data from the EPA WaterSense program, MaP flush testing, and manufacturer documentation.

What should you buy first when remodeling a bathroom?

Step 1: Measure the rough-in before anything else

The rough-in distance is measured from the finished wall surface (not the stud) to the centerline of the toilet drain flange. Most homes built after 1960 have a 12-inch rough-in. Older homes may have a 10-inch or 14-inch rough-in. Some compact or corner installations require a 10-inch model specifically. Buying a 12-inch toilet for a 10-inch rough-in results in a gap between the tank and the wall, which almost always forces a return.

To measure: remove the toilet, find the center of the drain hole, and measure straight back to the finished wall. If the toilet is still in place, measure from the wall to the center of one of the hold-down bolts at the base, then add 1/2 inch for the flange offset. Write this number down before opening any product page.

Step 2: Choose your toilet

Once you have the rough-in measurement, you can reliably filter to compatible models. At this stage the decisions that matter most are: flush performance, water use, bowl shape, height, and configuration (one-piece vs two-piece).

Flush performance: MaP (Maximum Performance) testing is the most reliable independent measure of toilet flushing ability. MaP scores represent the maximum grams of soybean paste a toilet can flush in a single attempt. A score of 500g is the minimum acceptable for residential use. A score of 800g to 1,000g means the toilet will handle heavy waste without issue. The TOTO Drake II achieves 1,000g in MaP testing at 1.28 GPF. The American Standard Champion 4 also earns a 1,000g MaP score. These scores are published at map-testing.com and are updated regularly as new models are submitted.

Water use: Standard toilets use 1.6 gallons per flush (GPF). High-efficiency toilets (HETs) use 1.28 GPF or less. EPA WaterSense-certified toilets must use no more than 1.28 GPF and must achieve a minimum MaP score of 350g to earn the label. Toilets that meet both WaterSense and high MaP scores represent the best practical value. The TOTO Drake, TOTO Aquia IV (0.8/1.0 GPF dual flush), Kohler Cimarron 1.28 GPF, and American Standard Cadet 3 1.28 GPF all carry WaterSense certification.

Bowl shape: Elongated bowls measure approximately 18.5 inches from seat bolt holes to the front rim. Round bowls measure approximately 16.5 inches. Elongated bowls are generally more comfortable for adults; round bowls save 2 inches of depth, which matters in bathrooms under 60 inches in length. Confirm actual bowl projection dimensions from the manufacturer specification sheet, not just the nominal "round" or "elongated" label.

Height: Standard height toilet seats sit 14 to 15 inches from floor to seat top. Comfort height (sometimes called chair height or ADA height) seats sit 16 to 18 inches from floor to seat top. Comfort height is easier for most adults to use and is required for ADA-compliant bathrooms. TOTO labels its comfort height as "Universal Height." Kohler uses "Comfort Height." Both refer to the same 16-to-18-inch seat range.

The best flushing toilets guide covers the top performers across all categories with MaP scores and certifications listed side by side.

What is the right order to buy bathroom fixtures?

Step 3: Select the vanity

Vanity selection requires knowing three numbers: the space available between the toilet and the nearest wall or obstacle, the plumbing rough-in height for the drain (usually 18 to 22 inches from the floor to the center of the drain pipe for a standard pedestal or vanity cabinet), and whether the space calls for a single sink or double sink vanity.

The NKBA (National Kitchen and Bath Association) recommends a minimum of 15 inches of clearance from the centerline of the toilet to any side obstacle and 21 inches of clearance in front of the toilet bowl. These clearances should be confirmed against your chosen toilet's footprint dimensions before ordering a vanity. Standard vanity depths run 18 to 21 inches for smaller bathrooms and 21 to 24 inches for master baths.

Vanity material matters for durability in high-humidity environments. Solid wood and plywood boxes outperform particleboard in moisture resistance. Look for dovetail or dowel joinery in the drawer boxes and full-extension undermount slides. Soft-close hinges are worth specifying; they add minimal cost at purchase and prevent the cabinet box from racking over years of use.

Step 4: Choose the sink and faucet together

The faucet must be bought alongside the sink because the number of holes in the sink deck determines which faucet configurations are compatible. A single-hole sink requires a single-hole faucet or a deck plate adapter. A three-hole sink (4-inch or 8-inch center spread) requires a centerset or widespread faucet that matches the spread. Buying these separately and then discovering a mismatch is one of the most common remodel delays.

For faucets, look for NSF/ANSI 61 certification (which confirms the faucet's contact surfaces meet drinking water safety standards) and EPA WaterSense certification if water efficiency is a priority. WaterSense bathroom faucets use no more than 1.2 gallons per minute (GPM) at 60 PSI. Standard faucets use 1.5 to 2.2 GPM. At 20 uses per day, a WaterSense faucet saves approximately 700 gallons per year per fixture compared to a 2.2 GPM model.

Step 5: Plan the shower or tub

Shower and tub selection is the most layout-constrained decision in the entire remodel. The rough opening dimensions must match the unit or the tile layout before any waterproofing work begins. If you are tiling a shower surround, the shower valve rough-in height (typically 48 inches from the floor to the center of the valve), the showerhead rough-in height (typically 72 to 80 inches from the floor), and the niche location must all be marked before cement board goes up.

For shower valves, pressure-balancing valves are required by code in most jurisdictions (they prevent scalding when a toilet is flushed). Thermostatic valves offer more precise temperature control and are worth considering for households with young children or elderly users. Both valve types should carry ASSE 1016 certification.

If a bathtub is included in the scope, confirm that the floor framing can support the filled weight. A standard 60x30-inch tub holds 40 to 50 gallons of water, which adds approximately 400 pounds of dynamic load to the floor. Freestanding soaking tubs can hold 80 to 100 gallons and should prompt a structural check of the floor joist span.

Which toilet brands offer the best reliability for a remodel?

Here is a summary of the top toilet models by category relevant to remodel selection:

The TOTO Drake II consistently appears at the top of both MaP test data and aggregated owner review analysis. Its G-Max flushing system uses a 3-inch flush valve and a large siphon jet to generate 1,000g MaP performance at 1.28 GPF. The two-piece configuration keeps the purchase price lower than one-piece equivalents while delivering the same flush system. For most bathroom remodels, the Drake II represents the highest combination of verified flush performance, water efficiency, and long-term owner satisfaction in its price range.

For those who want a one-piece configuration with the same flush engine, the TOTO UltraMax II delivers identical MaP performance in a seamless one-piece body that is easier to clean and has a more contemporary profile.

The American Standard Champion 4 takes a different engineering approach: its 4-inch flush valve is the largest in the residential market, producing exceptional raw flushing force. It runs at 1.6 GPF rather than 1.28 GPF, so it does not qualify for WaterSense. For households with frequent clogging history or heavy use, the additional water per flush is often considered acceptable given the reduction in plunger use and maintenance.

What certifications should you look for when buying bathroom fixtures?

EPA WaterSense: what it means in practice

The EPA WaterSense program, launched in 2006, is a voluntary partnership program that certifies products meeting water efficiency and performance standards. For toilets, the standard requires both water use no greater than 1.28 GPF and a minimum flush performance of 350 grams on the MaP test. Products that carry the WaterSense label have been independently tested by a third-party laboratory and confirmed to meet both criteria.

In practical terms, WaterSense certification on a toilet means: the product uses at least 20 percent less water than the federal standard of 1.6 GPF; it has cleared an independent flush performance test; and it qualifies for utility rebate programs in most water districts across the country. Many municipal water utilities offer rebates of $50 to $150 per WaterSense toilet replaced, which can offset a significant portion of the purchase price.

The list of WaterSense-certified products is maintained at epa.gov/watersense and is searchable by product category, brand, and model number. Cross-referencing this list with MaP scores from map-testing.com gives a complete picture of each model's efficiency and flush performance before purchase.

ADA compliance in bathroom remodels

If the bathroom will be used by anyone with mobility limitations, or if you are building for aging-in-place, ADA compliance affects multiple purchasing and installation decisions. Key requirements include: toilet seat height between 17 and 19 inches from the floor (all comfort-height models qualify); 60 inches of clear floor space alongside the toilet for a wheelchair turning radius; and grab bars rated to support 250 pounds installed into blocking or studs.

The blocking for grab bars should be installed during framing or when the walls are open, even if the bars themselves are not installed until later. Adding 2x10 or 3/4-inch plywood blocking inside the wall framing at heights of 33 to 36 inches from the floor costs almost nothing during construction and costs several hundred dollars in drywall repair if done afterward. This is a decision worth making at the framing stage regardless of current need.

For a deeper look at toilet specifications for mobility and aging-in-place, the ADA-compliant toilet guide covers dimensional requirements, model recommendations, and installation considerations in detail.

Comparing flush types for a remodel

Most residential bathroom remodels should default to gravity-flush toilets with large trapways and high MaP scores. Gravity flush is the most proven residential technology, requires no electricity, and has the simplest maintenance profile. Pressure-assisted flush adds flush power by using compressed air in the tank but produces more noise and requires specialty parts for repairs. Dual-flush toilets (like the TOTO Aquia IV with 0.8/1.0 GPF) offer the most water savings but require the household to consistently use the half-flush button for liquid waste to realize the projected savings.

For a detailed comparison of all flush types and their real-world performance, see the flush type guide which covers gravity, pressure-assist, dual-flush, and tornado/cyclone systems with MaP data for each.

Remodel Fixture Buying Timeline

The table below shows a recommended buying timeline for a complete bathroom gut remodel. Fixtures purchased too early may sit in boxes and sustain damage; purchased too late, they delay the tradesperson who needs them on site.

Custom vanities, special-order tile, and non-stock fixtures can have lead times of 6 to 12 weeks. If your project has any custom element, begin shopping and ordering at the design phase, before demo has even started. Plumbers and tile installers typically charge a standby fee if they arrive on site and the materials are not ready.

Ventilation: the most overlooked purchase

Bathroom exhaust fan selection is almost always an afterthought, but inadequate ventilation is the leading cause of mold growth, paint failure, and deteriorating grout in bathrooms. The Home Ventilating Institute (HVI) recommends a minimum of 1 CFM per square foot of bathroom floor space, or 50 CFM total for bathrooms under 50 square feet. Bathrooms with a separate toilet compartment or a jetted tub require additional capacity.

When walls are open, the opportunity exists to run dedicated duct to the exterior through a short, direct path. A fan rated at 80 to 110 CFM with a sone rating below 1.5 will provide strong, quiet ventilation. HVI-certified fans carry a published CFM rating that has been independently verified. Look for the HVI certification mark and the ENERGY STAR certification to confirm both airflow performance and energy efficiency.

Humidity-sensing fans that run automatically when relative humidity exceeds a set threshold are worth the modest price premium in any bathroom without natural ventilation. They remove the behavioral dependency of someone having to remember to turn on the fan, which is the primary reason manual fans fail to control moisture in practice.

Lighting decisions during remodel

Bathroom lighting is governed by NEC (National Electrical Code) wet and damp location ratings. Any fixture within 3 feet horizontally and 8 feet vertically of the shower or tub must be rated for wet locations (direct water contact). Fixtures outside that zone but inside the bathroom must be rated for damp locations. Purchasing a fixture without checking the wet/damp rating is one of the most common electrical code violations found during inspection.

For task lighting at the vanity, side-mounted sconces at eye level (approximately 60 to 65 inches from the floor to the center of the fixture) produce more even, shadow-free illumination than a single overhead bar. If only an overhead position is possible, a fixture with shielded bulbs pointed upward toward a white ceiling minimizes the shadows that cause difficulty with grooming tasks.

LED fixtures rated at 90 CRI or higher produce color rendering close to natural light and are worth specifying in any new installation. At 2700K to 3000K color temperature, they provide warm, flattering light appropriate for a bathroom environment without the greenish cast of lower-CRI options.

Tile selection and layout decisions

Tile decisions have the most visible long-term impact of any material choice in a bathroom remodel. Key specifications to evaluate: slip resistance (required coefficient of friction rating for floor tile is DCOF 0.42 or higher for wet areas per ANSI A137.1), water absorption rating (porcelain tile with less than 0.5 percent absorption outperforms ceramic in wet areas), and grout joint width (smaller joints mean more grout lines to maintain; 1/16-inch rectified porcelain tile minimizes this).

Large-format tiles (24x24 inches and larger) require a flatter substrate than small mosaic tiles. ANSI specifications require no more than 1/8-inch variation over 10 feet and 1/16-inch variation over 2 feet for large-format tile. If the floor or wall framing does not meet this flatness standard, a self-leveling compound or additional substrate layer is needed before tile can be set.

Grout color is a design decision with maintenance consequences. Light grout shows mold and discoloration more readily in high-moisture zones. Epoxy grout is significantly more stain- and mold-resistant than cement-based grout but is harder to install and more expensive. For shower floors and wet walls, specifying an epoxy or modified polymer grout adds initial cost but reduces maintenance significantly over the life of the bathroom.

Accessories and finishing hardware

Towel bars, toilet paper holders, robe hooks, and mirror hardware should all come from the same finish family. Mixing finishes (brushed nickel vanity faucet with chrome towel bar and matte black accessories) produces a visually fragmented result that is hard to correct without replacing pieces. Select all accessory finishes before ordering anything.

Towel bar mounting into drywall using only the supplied plastic anchors is a common failure point. Towel bars absorb significant lateral load when used by children or when towels are removed with one hand. Mounting directly to studs or into properly installed wall anchors rated for at least 25 pounds each is the standard that prevents bars from pulling out of the wall within two to three years of installation.

Toilet paper holders and robe hooks can be mounted to drywall with appropriate expansion anchors if stud locations do not align with desired placement. Toggle bolt-style anchors rated for 50 pounds are generally sufficient for these lower-load applications. Again, the supplied anchors in most accessory packages are marginal quality and worth replacing with heavier hardware.