- Built to code · fixed price
Deck Railing Installation & Replacement in Northern Virginia, Maryland and DC
FIXO handles deck railing installation, replacement and repair on decks and porches across Northern Virginia, Maryland and Washington, DC at one fixed price. We install wood, aluminum, composite and cable railings at code height and baluster spacing, with posts through-bolted to the frame so the rail doesn’t move when you lean on it. Most decks take one day.
G4.9 ★★★★★14 Google reviews
14 reviews · read them
Virginia · Maryland · Washington, D.C.
The number you sign is the number you pay
Express measurement within 48 hours
- The three specs that matter
Deck Railing Installation to Code: Height, Spacing and Post Strength
A railing is a safety system that happens to look nice. These are the numbers a building inspector checks. They come from the International Residential Code (IRC), which the 2021 Virginia Residential Code and Maryland’s county codes are built on.
Guard Height: 36 Inches Minimum
A deck or porch more than 30 inches above the ground needs a guard at least 36 inches tall, measured from the deck surface (IRC R312.1). Guards along a stair can be 34 inches, measured from the stair nosings. The 42-inch figure you’ll see online is the commercial building code, not a house.
Baluster Spacing: The 4-Inch Sphere Rule
No opening in the guard may let a 4-inch sphere pass, including the gap under the bottom rail. On the open side of a stair the limit is 4-3/8 inches, and the triangle formed by the tread, riser and bottom rail can be up to 6 inches (IRC R312.1.3). Wide-spaced decorative balusters fail this.
- Cable rails are tensioned so a 4-inch sphere can’t pass between the cables.
Post Strength: 200 Pounds at the Top
The code designs guards for a single 200-pound load at the top rail (IRC Table R301.5). That takes through-bolts into blocked joists, not screws into the rim joist.
- Post anchoring hardware is itemized on every railing quote.
- How it works
Deck Railing Installation in Three Steps
One visit to measure the frame, one fixed number, and new rails in a day.
Tell us about the deck
Call, text or book online with a rough length of railing and the look you want. We book a measurement within 48 hours.
- Same day
Express measurement, fixed price
A carpenter measures every run, pushes on every post, checks the rim joist, shows you system samples and hands you one written price.
- Within 48 hrs
Rails off, rails on
Old rails come off and are hauled away. Posts are anchored or replaced. New rail sections, balusters or cables, and caps go on level and tight.
- 1 day
- Straight talk
Deck Railing Repair, Replacement or a New Railing?
Deck railing repair fixes a solid system with a few loose or broken parts. Deck railing replacement swaps the whole system when it is rotted, dated or below code. New deck railing installation adds a guard where there wasn’t one, or a new style on sound posts. We tell you which one your deck needs after we push on every post.
| Repair | Replacement | New installation | |
|---|---|---|---|
| Fits when | A loose post, a few broken balusters or a cracked cap on a sound system | Rails rotting, wobbling everywhere or under 36 inches | A deck or porch with no guard, or a new style on solid posts |
| Posts | Re-bolted or blocked | Checked, re-bolted or replaced | New posts bolted into blocked joists |
| Often called | Deck railing repair, porch railing repair | Wood deck railing replacement, porch railing replacement | Porch railing installation, deck railing installation |
- Code-checked
What We Check on Every Railing
The rail is only as solid as the post under it. These four checks decide repair or replace.
- Every post pushed at the top for movement
- Guard height measured from the deck surface
- Gaps tested against the 4-inch sphere rule
- Rim joist and blocking checked where posts attach
Your price at measurementFixed · all-in
Where we talk you out of it: new rails on posts that are rotten at the base. The post is the rail. We replace it, or we don’t do the job.
- What it costs
Deck Railing Installation Cost and Replacement Cost
Short answer: deck railing replacement cost runs about $50 to $250 per linear foot installed, according to Fixr, depending on the system. Aluminum averages about $80 per linear foot installed (HomeAdvisor). At that rate, 40 feet of aluminum railing comes to roughly $3,200. Replacing only part of a railing (about a quarter to a third) runs $400 to $500, per HomeGuide.
Deck Railing Cost by Job
| Railing job | Typical national price | Source |
|---|---|---|
| Deck railing replacement, all systems | $50 – $250 per linear ft | Fixr |
| Aluminum deck railing installation | About $80 per linear ft installed | HomeAdvisor |
| Wood railing | $40 – $50 per linear ft (materials) | HomeAdvisor |
| Partial railing repair (25–30% of rails) | $400 – $500 | HomeGuide |
National cost-guide ranges. Your FIXO number is one written, fixed price, given at the measurement.
Cable Deck Railing Cost
Cable deck railing cost has the widest range: $50 to $200 per linear foot, depending on post material and design (HomeAdvisor). Stainless posts and corners sit at the top of that range.
- System by system
Wood, Aluminum, Composite or Cable Railing?
Four good systems. Pick by maintenance, look and budget.
- Where we won’t recommend it
Rails that fail the 4-inch rule
Wide-spaced balusters, horizontal “ladder” infill a child can climb, and guards under 36 inches.
- Fail inspection and come up at home sale
- Horizontal designs are climbable
- Short guards on decks over 30 inches
- Where it works best
Four systems we install
All built to current code across Northern Virginia, Maryland and DC.
- Wood: lowest cost, matches a wood deck, needs finishing
- Aluminum: powder-coated, no painting
- Composite: matches Trex decks, wash only
- Cable: open views, stainless hardware, highest cost
to measurement
fixed price
day to install
Railing Systems Compared
| System | Upkeep | Look | Typical price (national) |
|---|---|---|---|
| Wood | Paint or stain every few years | Matches a wood deck | $40 – $50 per linear ft, materials (HomeAdvisor) |
| Aluminum | None: powder-coated | Slim posts, black, white or bronze | About $80 per linear ft installed (HomeAdvisor) |
| Composite | Wash only | Matches a Trex or composite deck | $15 – $30 per linear ft, materials (HomeAdvisor) |
| Cable | Re-tension now and then | Open view | $50 – $200 per linear ft (HomeAdvisor) |
Aluminum Deck Railing Installation
Aluminum is the workhorse: no painting, no rot, and posts that mount to the frame with structural brackets. Black, white, bronze and textured finishes are available in most systems, and samples come to the measurement.
Cable Railing Installation
Cable gives you the view, but it is the least forgiving system to install. End and corner posts carry the cable tension, so they need solid blocking in the frame. The cables are tensioned to the maker’s spec and checked so a 4-inch sphere can’t pass.
- Stairs
Deck Handrail Installation on Stairs
A stair with four or more risers needs a graspable handrail 34 to 38 inches above the stair nosings (IRC R311.7.8). That’s separate from the guard. A wide, flat 2×6 cap doesn’t count, because a hand can’t wrap around it. Deck handrail installation is quoted on the same visit as the rails. If the stairs themselves are uneven or soft, see deck stair replacement.
- Clients love us
What homeowners in Northern Virginia, Maryland & D.C. say
Every review below is a real Google review, quoted word for word.
G Google · Verified
“Fast, professional, and very transparent pricing. They replaced our old living room carpet with LVP and it looks stunning.”
LVP · living room
G Google · Verified
“If you need a flooring contractor in Fairfax, these are your guys. They installed lvp in our entire basement. No mess left behind, and the price was very fair.”
Fairfax, VA · LVP · basement
G Google · Verified
“Fantastic experience! We wanted to replace the old carpet in our home with LVP. The team was punctual, and the floors look incredible. Highly recommend their installation services.”
LVP · carpet replacement
- Where we work
Deck Railing Contractors for Northern Virginia, Maryland and DC
FIXO’s carpenters handle deck railing installation in Alexandria, Arlington, Fairfax, McLean, Great Falls, Vienna, Oakton, Falls Church, Tysons, Reston, Herndon, Ashburn, Centreville, Clifton and Burke, Virginia, Bethesda and Silver Spring, Maryland, and Washington, DC. If you searched for deck railing installation near me from any of those areas, the carpenter who measures your posts is the one who installs your rails.
Permit rules differ by county. Prince William County requires a building permit to replace a guardrail on an existing deck. Montgomery County’s permitting office says guardrail and stair replacement need one. Fairfax County requires a permit to alter an existing deck. We check your address and pull the permit where it’s required.
- FAQ
Deck Railing Installation: Questions We Get Every Week
Straight answers. If yours isn’t here, call (757) 589-6859 — an installer picks up.
About $50 to $250 per linear foot nationally, depending on the system (Fixr). Aluminum averages about $80 per linear foot installed. FIXO gives you one fixed price after a free measurement.
Often, yes. Prince William County requires a permit for guardrail replacement on an existing deck, and Montgomery County requires one for guardrail replacement. Fairfax County requires a permit to alter an existing deck. We confirm the rule for your address and handle the permit.
At least 36 inches above the deck surface when the deck is more than 30 inches off the ground (IRC R312.1). The 42-inch number applies to commercial buildings.
Yes, if the posts and top rail are solid and at code height. We check at the measurement and quote the smaller job when it makes sense.
Yes. Any walking surface more than 30 inches above the ground needs a guard, and we bolt new posts into blocked joists to add one.
Yes. Porch railing installation, repair and replacement follow the same height, spacing and post rules as a deck.
Black, white, bronze and textured finishes in most systems. Samples come to the measurement.
Most decks take one day for rails. Add half a day for stair rails and handrails.
Yes. The number you sign is the number you pay, including any posts we listed for replacement.
- Ready when you are
Get Your Fixed Price for Deck Railing Installation
Book a free express measurement and an installer hands you one written number within 48 hours.
- Prefer to talk first?
Let's talk about your railings.
Leave four details and an installer calls you back within business hours, usually inside the hour. No sales script, no pressure, no showroom visit.
- Call or text(757) 589-6859
- Emailinfo@fixodmv.com · replies within a few hours
- HoursMon–Sat 8am–8pm · Sun closed
- ServingNorthern Virginia, Maryland & Washington, D.C.
The person who measures your home is the person who installs it.
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